Amazon SES
6.19%
AWS Simple Email Service — high-volume cloud email backbone for AWS workloads.
SaaS & ESP senders portfolio
← Back to landingCatalogue of SPF-side senders authorised to send mail on behalf of domains in the Tranco top-1M: marketing ESPs, SaaS apps, security gateways and forwarders. Click a card for the detailed analysis; mini-charts show share dynamics over past snapshots.
472senders in current scan
416catalogued (with description)
72.28%of all SPF-domains covered
2026-09-13scan date · 628,913 SPF domains
SendGrid (Twilio)
4.64%
Twilio SendGrid — transactional and marketing email API used by SaaS apps worldwide.
Mailgun
4.01%
Sinch Mailgun — developer-first transactional/relay email service.
3.77%
Enterprise customer support platform.
Mailchimp
3.57%
Intuit Mailchimp — newsletter and marketing automation, dominant SMB ESP in North America and EU.
Mandrill
3.25%
Mailchimp transactional add-on (formerly standalone).
HubSpot
3.12%
HubSpot CRM/Marketing Hub email — popular SMB inbound marketing platform.
Salesforce
2.55%
Salesforce CRM transactional/sales sends.
Mailjet (Sinch)
2.12%
France-origin transactional+marketing ESP, now Sinch group.
Cloudflare Email Routing
1.95%
Cloudflare free email forwarding (route#.mx.cloudflare.net + spf.mx.cloudflare.net).
Brevo (ex-Sendinblue)
1.48%
French SMB ESP (rebranded from Sendinblue), strong in EU mid-market.
Mimecast
1.35%
UK-origin enterprise email security gateway (Permira-owned).
Namecheap Forwarding
1.22%
Namecheap registrar inbound email forwarding (efwd.registrar-servers.com).
MailerLite
1.03%
Email marketing platform using mlsend.com for SPF authentication.
MailChannels
1.01%
Canadian outbound relay used by Cloudflare and many hosting providers.
Proofpoint
0.91%
Proofpoint — leading enterprise email security gateway providing inbound filtering and outbound DLP.
0.86%
Shopify — Canadian e-commerce platform sending order, shipping and customer notifications from merchant storefronts.
0.74%
Salesforce Marketing Cloud Account Engagement (formerly Pardot) — B2B marketing automation tightly integrated with Salesforce CRM.
Elastic Email
0.70%
Canadian low-cost email API and marketing platform.
Polish CodeTwo email-signature management for Microsoft 365 (emailsignatures365.com).
Unisender (RU)
0.58%
Unisender — Russian email and SMS marketing platform, one of the most popular ESPs in the RU/CIS market.
Constant Contact
0.57%
US small-business newsletter platform.
Campaign Monitor
0.55%
Australia-origin newsletter ESP (Marigold), popular with agencies.
0.53%
KnowBe4 — security awareness training and simulated phishing platform, the largest vendor in that category.
Marketo (Adobe)
0.51%
Adobe Marketo Engage — B2B marketing automation, enterprise-grade.
Zoho Campaigns
0.50%
Zoho Campaigns marketing automation (zcsend.net).
Postmark
0.47%
Transactional email service known for high deliverability and developer UX.
Emsd1 (transactional)
0.46%
Generic transactional/marketing infra (emsd1.com).
SendPulse
0.45%
Ukrainian/UA-origin multi-channel marketing platform.
Exclaimer (signatures)
0.42%
UK-headquartered email-signature management (Insight Partners).
SparkPost
0.42%
MessageBird-owned high-volume transactional email backbone.
Zoho ZeptoMail
0.40%
Zoho transactional email API (transmail.net / zoho-mail.com).
Help Scout
0.35%
US helpdesk SaaS sending customer-support emails.
Salesforce Marketing Cloud
0.34%
Salesforce ExactTarget — enterprise marketing automation suite.
Barracuda Essentials
0.33%
Barracuda Essentials cloud email security gateway.
0.32%
Atlassian Statuspage — hosted incident-communication and uptime status page service for SaaS companies.
MailerSend
0.31%
Transactional email API by MailerLite team.
0.29%
Trustpilot — Danish consumer review platform that sends review-invitation emails on behalf of merchants.
0.29%
Firebase — Google mobile and web app backend platform sending auth, password-reset and project notification emails.
0.28%
BigCommerce — US SaaS e-commerce platform sending order, shipping and account emails for merchant stores.
Atlassian — Australian maker of Jira, Confluence and Bitbucket, sending issue and collaboration notifications.
Hornetsecurity
0.27%
German cloud email security (Vade group).
No historical data yet.
RD Station (BR)
0.26%
Brazilian leading marketing automation (RD Station, by Resultados Digitais).
No historical data yet.
Freshdesk
0.25%
Freshworks customer support helpdesk.
Trend Micro Email Security
0.25%
Trend Micro Email Security (TMES) cloud gateway.
No historical data yet.
SMTP.com
0.24%
Long-running US SMTP relay service for marketers.
No historical data yet.
MailUp
0.24%
Italian marketing automation, enterprise B2C.
SpamExperts (AntiSpamCloud)
0.23%
SpamExperts AntiSpamCloud filter.
StackMail
0.22%
UK shared webmail used by registrars/resellers.
No historical data yet.
0.20%
Lark (Feishu in China) — ByteDance collaboration suite combining chat, docs, calendar and email for enterprises.
SMTP2GO
0.19%
New Zealand transactional email service.
Infomaniak (CH)
0.18%
Geneva-based Swiss hosting/cloud with mail.
0.18%
Sage Intacct — cloud financial management and accounting software for mid-market companies, owned by UK-based Sage.
0.18%
Oracle NetSuite — cloud ERP, financials and CRM suite sending invoices, statements and workflow notifications.
SALESmanago (PL)
0.17%
Krakow-based marketing automation (Benhauer).
No historical data yet.
Locaweb (BR)
0.17%
Locaweb Brazilian hosting/mail outbound.
eSputnik (UA)
0.17%
Ukrainian multi-channel marketing automation (Promodo group).
No historical data yet.
0.17%
Oracle Cloud Email — transactional and marketing email services within the Oracle Cloud Infrastructure stack.
0.17%
Qualtrics — experience-management platform that sends survey invitations and feedback requests on customer domains.
Blackbaud
0.16%
US fundraising / nonprofit CRM (outboundmail.blackbaud.net).
No historical data yet.
Proofpoint Essentials
0.16%
Proofpoint Essentials cloud gateway for SMB (ppe-hosted.com).
No historical data yet.
Turbo-SMTP
0.16%
Italian SMTP relay service.
No historical data yet.
0.16%
WordPress.com and WP Cloud (Automattic) — managed WordPress hosting that sends site, comment and subscriber emails.
IPzMarketing
0.15%
US deliverability + ESP infrastructure.
No historical data yet.
AuthSMTP
0.15%
UK SMTP relay for SMB outbound.
0.15%
SAP SuccessFactors — HR cloud.
0.15%
Docebo — Canadian cloud LMS for enterprise learning, sending course enrollment and reminder notifications.
Zoho Mail EU (sender)
0.14%
Zoho Mail EU residency outbound (zohomail.eu).
No historical data yet.
Mailendo
0.14%
Polish marketing email platform.
No historical data yet.
EmailLabs (PL)
0.14%
Polish transactional email platform (Vercom group).
No historical data yet.
SenderSRV
0.13%
Generic sender service (sendersrv.com).
No historical data yet.
Freshworks Freshmarketer
0.13%
Freshworks Freshmarketer — marketing automation.
No historical data yet.
ZeptoMail (Zoho)
0.13%
ZeptoMail — Zoho transactional email API.
No historical data yet.
ImprovMX
0.13%
Free email forwarding for custom domains.
No historical data yet.
0.13%
Oracle Cloud — Oracle public-cloud platform whose services send account, billing and operational notifications.
Mailspike
0.12%
Portuguese reputation/anti-spam service.
No historical data yet.
MailHostBox
0.12%
Indian Directi MailHostBox shared mail platform.
SMTP.BZ
0.12%
Low-cost transactional SMTP relay.
No historical data yet.
Exclaimer
0.12%
Exclaimer — email signature management; rewrites outgoing mail.
No historical data yet.
Repica WebCAS
0.12%
Repica WebCAS — Japanese email marketing platform.
No historical data yet.
SpamExperts (SolarWinds)
0.12%
SolarWinds-owned SpamExperts white-label cloud filter.
Kagoya (JP, sender)
0.11%
Kagoya Japan rental hosting outbound (kagoya.net).
BizMatrix
0.11%
BizMatrix Vail — Japanese marketing email platform.
No historical data yet.
Zoho Mail 360
0.11%
Zoho Mail 360 — multi-tenant business email API.
No historical data yet.
Flowmailer
0.11%
Dutch transactional email platform, B2B-leaning.
No historical data yet.
UniSender
0.11%
UniSender — CIS email marketing platform.
No historical data yet.
Emma
0.11%
US SMB+mid-market newsletter platform (CM Group).
No historical data yet.
DashaMail (RU)
0.11%
Russian email marketing platform (DashaMail).
No historical data yet.
KMITD (TH)
0.11%
Thai academic / govt mail (Knowledge Management IT).
No historical data yet.
0.11%
Zoho Books — invoicing/accounting; sends invoice emails on customer behalf.
0.11%
AFAS Online — Dutch ERP/HR cloud.
Newsletter2Go (Brevo)
0.10%
Newsletter2Go — German SMB ESP, now part of Brevo.
No historical data yet.
Sendsay
0.10%
Sendsay — Russian email marketing platform with surveys + automation.
No historical data yet.
GetResponse
0.10%
Polish-origin email marketing, widely used in EU SMB.
No historical data yet.
SecureMX
0.10%
SecureMX — Japanese email security gateway.
No historical data yet.
Mindbox
0.10%
Mindbox — Russian CDP + email/SMS/push marketing automation.
No historical data yet.
Netcore Cloud (Pepipost)
0.10%
Netcore Cloud — customer engagement and email API.
No historical data yet.
Sailthru
0.10%
Marigold Sailthru — publisher-focused personalisation ESP.
FSI Email Security
0.10%
FSI — Japanese managed email security.
No historical data yet.
0.10%
Greenhouse — applicant tracking system widely used by mid-market and enterprise recruiters in North America.
Klaviyo
0.09%
E-commerce-focused marketing automation, dominant on Shopify.
No historical data yet.
Intercom
0.09%
Customer messaging platform — transactional + lifecycle email.
No historical data yet.
emBlue
0.09%
Argentinian/Latin-America marketing automation.
No historical data yet.
0.09%
PayPal Braintree — payments gateway sending receipt, dispute and payout notifications to merchants and buyers.
0.09%
ClickDimensions — marketing automation platform built natively on top of Microsoft Dynamics 365 CRM.
Zoho Campaigns (IN)
0.08%
Zoho Campaigns India residency.
No historical data yet.
Mailtrap
0.08%
Mailtrap — email testing & sending API.
No historical data yet.
HDEMS
0.08%
HDEMS — outsourced email marketing operations.
No historical data yet.
Cuenote
0.08%
Cuenote (Toban) — Japanese email marketing platform.
No historical data yet.
0.08%
UKG (Ultimate Kronos Group) — US HCM and workforce-management suite formed from the Ultimate Software and Kronos merger.
Forcepoint MailControl
0.07%
Forcepoint MailControl — enterprise email security.
No historical data yet.
MessageGears
0.07%
Enterprise on-premise/hybrid email engine.
No historical data yet.
Customer.io
0.07%
Lifecycle marketing automation for product teams.
Sophos Email (EU)
0.07%
Sophos Email — Hydra cloud gateway, EU central region.
No historical data yet.
Act-On Software
0.07%
Act-On — mid-market marketing automation platform.
No historical data yet.
SmartEmailing
0.07%
SmartEmailing — Czech SMB email marketing platform.
No historical data yet.
NGP VAN
0.07%
US Democratic-party fundraising/CRM platform.
No historical data yet.
0.07%
Autotask PSA — professional services automation platform for MSPs, originally Datto and now sold alongside ConnectWise tooling.
0.07%
TOPdesk — service desk and ITSM cloud.
0.07%
FormAssembly — enterprise web-form and data-collection platform with strong Salesforce integration.
0.07%
Odoo — Belgian open-source ERP and business-apps suite covering CRM, accounting, ecommerce and HR.
0.07%
Zimpel (Cision Germany) — PR distribution.
0.07%
ConnectWise — US suite of PSA, RMM and remote-support tools for managed service providers.
0.07%
Shoptet — leading Czech e-commerce platform powering tens of thousands of small and mid-size online shops.
Adestra (MessageFocus)
0.06%
Adestra MessageFocus — UK enterprise email platform (now Upland).
No historical data yet.
ActiveGate
0.06%
ActiveGate — Japanese email security gateway.
No historical data yet.
Q-Send
0.06%
Q-Send — Japanese email delivery service.
No historical data yet.
NewsMAN
0.06%
NewsMAN — Romanian email marketing service.
No historical data yet.
SolarWinds MailLogin
0.06%
SolarWinds MailLogin — outbound mail signing.
No historical data yet.
Doppler
0.06%
Doppler — LATAM email marketing, strong in Argentina.
No historical data yet.
APSIS
0.06%
APSIS — Swedish ESP, strong Nordic SMB presence.
No historical data yet.
Autopilot HQ
0.06%
Visual marketing-automation builder (now Ortto).
No historical data yet.
Stibee
0.06%
Stibee — Korean newsletter platform.
No historical data yet.
iCoreMail
0.06%
iCoreMail — Indian email marketing platform.
No historical data yet.
Freshservice — IT service desk by Freshworks.
0.06%
HappyFox — cloud helpdesk and ticketing software for customer support teams, headquartered in California.
0.06%
ecbeing — Japanese e-commerce SaaS platform.
No historical data yet.
Barracuda Email Security
0.05%
Barracuda Email Security Service (UK PoP).
No historical data yet.
Forward Email
0.05%
Forward Email — open-source email forwarding service.
No historical data yet.
CrmStyle
0.05%
CrmStyle — Italian email marketing platform.
No historical data yet.
GMO Lolipop (JP)
0.05%
GMO Pepabo Lolipop! shared hosting outbound mail.
No historical data yet.
Combell MailProtect (BE)
0.05%
Belgian Combell group email security (mailprotect.be).
No historical data yet.
Keap (Infusionsoft)
0.05%
CRM + email marketing for very-small businesses.
No historical data yet.
Liana Technologies
0.05%
Liana Technologies — Finnish marketing automation suite.
No historical data yet.
Benchmark Email
0.05%
Polyglot small-business newsletter platform.
No historical data yet.
Host-H (BG)
0.05%
Bulgarian Host-H shared hosting outbound.
Porkbun
0.05%
Porkbun registrar SPF and email forwarding.
No historical data yet.
Net-Results EmailCampaigns
0.05%
Net-Results marketing automation (emailcampaigns.net).
No historical data yet.
UniOne
0.05%
UniOne (UniSender) — Russian transactional email API.
No historical data yet.
Carts Guru
0.05%
French ecommerce abandoned-cart automation.
No historical data yet.
Blackbaud Luminate (Convio)
0.05%
Blackbaud Luminate Online — nonprofit fundraising + email.
No historical data yet.
Sophos Email
0.05%
Sophos Email (Hydra) — cloud security gateway.
No historical data yet.
Tipimail (Sinch)
0.05%
French transactional ESP, part of Sinch / Mailjet group.
No historical data yet.
Masterbase
0.05%
Chilean marketing automation, LatAm reach.
No historical data yet.
Cisco IronPort (ICPbounce)
0.05%
Cisco IronPort — bounce-handling SPF domain.
No historical data yet.
Sendergen
0.05%
Sendergen — bulk email service, India-based.
No historical data yet.
AWeber
0.05%
Veteran small-business newsletter platform.
No historical data yet.
Alibaba DirectMail
0.05%
Alibaba Cloud DirectMail (DM) transactional/marketing email (CN+APAC).
No historical data yet.
Emarsys (SAP)
0.05%
Vienna-origin enterprise marketing platform, now SAP CX.
Microsoft 365 US Gov
0.05%
Microsoft 365 — US Government Community Cloud.
No historical data yet.
Vade EdgePilot
0.05%
Vade SafeSend / EdgePilot product line.
No historical data yet.
A Random Server (parking)
0.05%
Generic SafeNames-style parking SPF.
0.05%
Blackboard — LMS for higher-ed; course notification email.
0.05%
MakeShop — Japanese e-commerce store builder.
No historical data yet.
0.05%
Workspace.com / k.io — collaboration platform.
0.05%
Swiss HR talent management (Haufe-umantis).
0.05%
Ex Libris — academic library cloud (ProQuest).
No historical data yet.
0.05%
Chargebee — subscription billing and revenue management platform, dual-headquartered in San Francisco and Chennai.
0.05%
Czech helpdesk SaaS for SMB customer support.
0.05%
Danish/European hosting (Group.ONE, _custspf.one.com).
0.05%
Kommo (formerly amoCRM) — Russian/CIS sales pipeline CRM.
0.05%
Danish customer-service / conversation platform.
MailGaner
0.04%
MailGaner — Russian email marketing platform.
No historical data yet.
Heureka Mailing (CZ)
0.04%
Czech price-comparison portal sending merchant notifications.
No historical data yet.
ContactPigeon
0.04%
Greek omnichannel marketing automation (Athens).
No historical data yet.
CARMA Mail
0.04%
CARMA — niche US ESP (carmamail.com SPF infra).
No historical data yet.
Acumbamail (ES)
0.04%
Spanish SMB email marketing platform.
No historical data yet.
LogicBoxes OrderBox
0.04%
LogicBoxes OrderBox storefront SPF for resellers.
No historical data yet.
Eloqua (Oracle)
0.04%
Oracle Eloqua — enterprise B2B marketing automation.
No historical data yet.
Engaging Networks
0.04%
Engaging Networks — nonprofit advocacy email.
No historical data yet.
SecondStreet
0.04%
US promotions/loyalty platform with email engine (secondstreetmail.com).
No historical data yet.
KingHost (BR)
0.04%
Brazilian shared hosting outbound (kinghost.net).
WiLL Mail
0.04%
WiLL Mail — Japanese email delivery service.
No historical data yet.
Vade Secure Cloud
0.04%
French Vade Secure (Hornetsecurity group) AI-driven security.
No historical data yet.
edrone
0.04%
edrone — Polish e-commerce CRM/email.
No historical data yet.
ActiveTrail
0.04%
Israeli email marketing automation, popular in MENA/EU.
No historical data yet.
PR Newswire
0.04%
Cision-owned press release distribution.
No historical data yet.
Tapfiliate
0.04%
Dutch affiliate-marketing SaaS sending tracked notifications.
No historical data yet.
IAI-Shop (PL)
0.04%
IAI ecommerce platform sending merchant notifications (iai-sa.com).
No historical data yet.
All-In Mail
0.04%
All-In Mail — Brazilian email marketing platform.
No historical data yet.
Flexmail
0.04%
Flexmail — Belgian email marketing.
No historical data yet.
UzmanPosta (TR)
0.04%
Turkish METU foundation corporate mail (UzmanPosta).
No historical data yet.
MailPlus
0.04%
MailPlus — Dutch email marketing service.
No historical data yet.
Fortinet FortiMail
0.04%
FortiMail Cloud — Fortinet email security gateway.
No historical data yet.
0.04%
ServiceNow — ITSM enterprise platform.
No historical data yet.
0.04%
Gannett media group (USA Today, local newsrooms) marketing/notifications.
0.04%
Sabre SynXis — hospitality CRS.
No historical data yet.
0.04%
Russian/CIS retail CRM for ecommerce merchants.
0.04%
Pittsburgh-based pair Networks shared hosting outbound (pair.com).
0.04%
D2L Brightspace LMS — Canadian higher-ed/K-12 platform.
0.04%
MerchantPro — Romanian e-commerce platform.
No historical data yet.
0.04%
Tipalti — global payables automation; sends payment notification email.
No historical data yet.
0.04%
DocuClass — document management SaaS.
No historical data yet.
0.04%
Alchemer (formerly SurveyGizmo) — survey platform.
No historical data yet.
0.04%
rexx systems — German HR cloud.
No historical data yet.
Clean MX
0.03%
Clean MX — Portuguese email security gateway.
No historical data yet.
Endurance/Newfold Cloudfilter
0.03%
Newfold Digital (Endurance) Cloudfilter mail security.
No historical data yet.
Scaleway TEM
0.03%
Scaleway Transactional Email Manager (FR cloud).
No historical data yet.
Salsa Labs
0.03%
Salsa Labs — nonprofit advocacy + email engagement.
No historical data yet.
Wild West Domains Forwarder
0.03%
Wild West Domains (GoDaddy reseller) email forwarding.
No historical data yet.
Cybermail
0.03%
CyberMail — Japanese email marketing system.
No historical data yet.
Adestra MessageProvider
0.03%
Adestra MessageProvider — UK enterprise email infrastructure.
No historical data yet.
Smaily
0.03%
Estonian newsletter ESP (Tallinn).
No historical data yet.
ZXCS (NL gateway)
0.03%
Dutch Stichting DIGI NL spam filter.
No historical data yet.
Symantec MTA Routes
0.03%
Symantec/Broadcom MTA Routes — outbound delivery.
No historical data yet.
SuperCP
0.03%
SuperCP control-panel hosting outbound (supercp.com).
Tricorn
0.03%
Tricorn — Chinese marketing automation/email platform.
No historical data yet.
Spotler
0.03%
Spotler — UK marketing automation platform.
No historical data yet.
Mailkit
0.03%
Mailkit — Czech enterprise email marketing.
No historical data yet.
InterNetX SMTP
0.03%
InterNetX (Munich) SMTP relay used by registrar customers.
No historical data yet.
SecureMailGate
0.03%
SecureMailGate — German email security gateway.
No historical data yet.
Maropost
0.03%
Maropost — Canadian marketing cloud, B2C focus.
No historical data yet.
DynDNS Mailhop
0.03%
Dyn Mailhop — email forwarder/relay.
No historical data yet.
Mailinblack
0.03%
Mailinblack — French email security gateway.
No historical data yet.
Retarus (DE gateway)
0.03%
Munich enterprise messaging gateway (transactional + secure email).
No historical data yet.
Alibaba DirectMail (APAC)
0.03%
Alibaba DirectMail Singapore region.
No historical data yet.
SendClean
0.03%
Indian transactional+marketing email API (sendclean.net).
No historical data yet.
emailsys (artegic, DE)
0.03%
artegic emailsys — Bonn-based enterprise CRM/email platform.
No historical data yet.
Evalanche / SC-Networks
0.03%
German B2B marketing-automation by SC-Networks (Evalanche, scnem.com).
No historical data yet.
IP Made (CDP)
0.03%
Transactional Mail (Japan) — JP transactional email API.
No historical data yet.
LibraESVA
0.03%
Libra Esva — email security gateway (cloud).
No historical data yet.
MailWise (mwprem)
0.03%
Shared MailEnable/IceWarp cluster (mwprem.net).
No historical data yet.
Sophos Email (US)
0.03%
Sophos Email — Hydra cloud gateway, US west region.
No historical data yet.
FireEye / Trellix
0.03%
FireEye Email Security (now Trellix).
No historical data yet.
Webempresa Mail
0.03%
Webempresa hosting outbound mail.
Egress Defend (UK)
0.03%
UK Egress (KnowBe4 group) inbound defense.
No historical data yet.
Paubox
0.03%
Paubox — HIPAA-compliant email gateway.
No historical data yet.
Selzy
0.03%
Selzy — email marketing platform (formerly Estismail).
No historical data yet.
Newsweaver (NE16)
0.03%
Newsweaver NE16 — secondary sending domain.
No historical data yet.
Qualtrics Mail
0.03%
Qualtrics XM survey/email infra (qemailserver.com).
No historical data yet.
Neon One
0.03%
Neon One — nonprofit CRM email.
No historical data yet.
FreshMail (PL)
0.03%
Polish newsletter and automation ESP (Krakow).
No historical data yet.
Microsoft Defender for Office 365
0.03%
Microsoft 365 EOP / Defender — primary M365 mail security.
No historical data yet.
Skymail (BR)
0.03%
Brazilian Skymail (SkyOne) outbound.
No historical data yet.
0.03%
Microsoft Dynamics 365 Marketing.
No historical data yet.
0.03%
Esker — document automation cloud.
No historical data yet.
0.03%
Groove — SMB shared inbox / helpdesk.
0.03%
Autodoc — European auto-parts e-commerce.
No historical data yet.
0.03%
Zoho Invoice — sends invoice/payment emails on customer behalf.
No historical data yet.
0.03%
User.com (UserEngage) — marketing automation.
No historical data yet.
0.03%
Ellucian — higher-education ERP cloud.
No historical data yet.
0.03%
pair Networks mailing list service.
No historical data yet.
0.03%
SolarWinds Service Desk (Samanage) — ITSM cloud.
No historical data yet.
0.03%
UNAS — Hungarian e-commerce platform.
No historical data yet.
0.03%
Cvent — event management platform.
No historical data yet.
0.03%
Freshsales — sales CRM by Freshworks, an Indian-founded SaaS company now headquartered in San Mateo.
0.03%
Naviga — media publishing cloud.
No historical data yet.
0.03%
Sparkasse Emma — German banking customer email.
No historical data yet.
0.03%
Amadeus — travel/hospitality reservation cloud.
No historical data yet.
0.03%
Neto (now Maropost Commerce) — Australian e-commerce platform.
No historical data yet.
0.03%
Transact CashNet — higher-ed payments.
No historical data yet.
0.03%
Robin — customer support platform (Robin HQ).
No historical data yet.
0.03%
Tray — Brazilian e-commerce platform.
No historical data yet.
Cafe24 (Gabia, KR)
0.02%
Cafe24 hosting outbound (Gabia infra).
No historical data yet.
TouchNet (FIS)
0.02%
FIS-owned higher-education payments / billing platform.
YMLP
0.02%
Your Mailing List Provider — Belgian newsletter ESP.
No historical data yet.
Informz (Higher Logic)
0.02%
Higher Logic Informz — association email marketing.
No historical data yet.
Letsignit
0.02%
Letsignit — email signature management.
No historical data yet.
Microsoft 365 China
0.02%
Microsoft 365 — China (operated by 21Vianet).
No historical data yet.
Message Business (Sendethic)
0.02%
Message Business — French email marketing platform.
No historical data yet.
BeSender
0.02%
BeSender — Japanese email marketing service.
No historical data yet.
Netcore Cloud
0.02%
India-origin marketing automation, strong in APAC.
No historical data yet.
Synergy Wholesale (AU)
0.02%
Australian wholesale registrar with mailbox bundle.
No historical data yet.
QuickPivot
0.02%
QuickPivot — multichannel marketing automation.
No historical data yet.
Rule
0.02%
Rule — Swedish marketing automation.
No historical data yet.
emSMTP
0.02%
emSMTP — transactional/marketing relay.
No historical data yet.
Pinpointe
0.02%
Pinpointe — B2B email marketing platform.
No historical data yet.
Signature365
0.02%
Signature365 — email signature management.
No historical data yet.
MTARGET
0.02%
MTARGET — Indonesian email/SMS marketing.
No historical data yet.
JangoMail (Email Galaxy)
0.02%
JangoMail / Email Galaxy — high-volume bulk email.
No historical data yet.
Masiv
0.02%
Masiv — Colombian SMS/email marketing.
No historical data yet.
Synergy! Marketing
0.02%
Synergy! Marketing — Japanese marketing cloud.
No historical data yet.
Treasure Ship
0.02%
Treasure Ship — Japanese email marketing service.
No historical data yet.
Akna
0.02%
Akna — Brazilian email marketing platform.
No historical data yet.
ReSender (RU)
0.02%
ReSender — Russian email distribution platform.
No historical data yet.
ESP1
0.02%
ESP1 — Korean email service provider.
No historical data yet.
Maileroo
0.02%
Australian transactional email API and SMTP relay.
No historical data yet.
Paloma
0.02%
Paloma — Swedish email marketing platform.
No historical data yet.
SafeWebServices
0.02%
SafeWebServices — managed email security.
No historical data yet.
DitoMail
0.02%
Dito — Brazilian CDP and email marketing.
No historical data yet.
EBlastEngine
0.02%
EBlastEngine — bulk email service.
No historical data yet.
Inforu (INFORU)
0.02%
Inforu — Israeli SMS/email marketing.
No historical data yet.
SendCloud (China)
0.02%
SendCloud (Sohu) — Chinese transactional email.
No historical data yet.
Logix InfoSec
0.02%
Logix Infosecurity — Indian email gateway.
No historical data yet.
AppRiver (Zix)
0.02%
AppRiver (Zix/OpenText) — secure email + spam filter.
No historical data yet.
Contactlab
0.02%
Contactlab — Italian customer engagement platform.
No historical data yet.
Copernica
0.02%
Copernica — Dutch email marketing software.
No historical data yet.
Send-Box
0.02%
Send-Box — Russian email marketing platform.
No historical data yet.
Fidelizador
0.02%
Fidelizador — Chilean email marketing platform.
No historical data yet.
MailSwitch
0.02%
MailSwitch — Dutch email security gateway.
No historical data yet.
Microsoft 365 Germany
0.02%
Microsoft 365 — Germany cloud (deprecated tenant).
No historical data yet.
Perfit
0.02%
Perfit — Argentinian email marketing.
No historical data yet.
SNDR (Norway)
0.02%
SNDR — Norwegian email distribution.
No historical data yet.
DNSExit
0.02%
DNSExit — DNS + email forwarding service.
No historical data yet.
SpamHero
0.02%
SpamHero — email security gateway.
No historical data yet.
Securence (SolarWinds)
0.02%
Securence — SolarWinds email security service.
No historical data yet.
Sendios
0.02%
Lifecycle and transactional email platform.
No historical data yet.
Bullhorn
0.02%
Bullhorn — recruitment CRM with built-in email.
No historical data yet.
IS.CC Relay
0.02%
IS.CC — generic SMTP relay service.
No historical data yet.
Kirim.Email
0.02%
Indonesian email-marketing and automation platform.
No historical data yet.
Newsweaver
0.02%
Newsweaver — Irish enterprise newsletter ESP.
No historical data yet.
Splio
0.02%
French customer-marketing and loyalty automation platform.
No historical data yet.
0.02%
EventsAir — event management platform.
No historical data yet.
0.02%
PowerSchool SchoolMessenger — K-12 parent communications.
0.02%
Transsmart — Dutch shipping platform.
No historical data yet.
0.02%
Crescendo Interactive — planned-giving fundraising.
No historical data yet.
0.02%
Toast — restaurant POS and digital ordering.
No historical data yet.
0.02%
PR TIMES — Japanese press release distribution.
No historical data yet.
0.02%
UserVoice — product feedback / customer support SaaS.
0.02%
Yardi — real-estate property management cloud.
No historical data yet.
0.02%
Stova (formerly Aventri) — event management cloud.
No historical data yet.
0.02%
Cadmium — event/conference content management.
No historical data yet.
0.02%
CashEdge (Fiserv) — financial data + payments platform.
No historical data yet.
0.02%
Chargify (Maxio) — subscription billing platform.
No historical data yet.
0.02%
Newsquest — UK regional news media.
No historical data yet.
0.02%
Gorgias — helpdesk built for Shopify and other e-commerce stores, founded in Paris and now based in San Francisco.
0.02%
Webropol — Finnish survey & analytics platform.
No historical data yet.
0.02%
Ingenie — French SaaS.
No historical data yet.
0.02%
Cegedim — French healthcare data and software.
No historical data yet.
0.02%
Shop-Pro (GMO) — Japanese e-commerce platform.
No historical data yet.
0.02%
Watermark Insights — higher-ed assessment cloud.
No historical data yet.
0.02%
Echobox — AI-driven publishing tool for media.
No historical data yet.
0.02%
The Access Group — UK business management cloud.
No historical data yet.
0.02%
Extole — referral marketing platform.
No historical data yet.
0.02%
easybill — German invoicing SaaS.
No historical data yet.
0.02%
Givex — gift card and loyalty cloud.
No historical data yet.
0.02%
Pearl — UK loyalty cloud.
No historical data yet.
0.02%
Freshservice — Freshworks ITSM ticketing.
No historical data yet.
0.02%
MsgApp — messaging API platform.
No historical data yet.
0.02%
WeFact — Dutch invoicing software.
No historical data yet.
0.02%
Microsoft SharePoint Online — collaboration notifications.
0.02%
Mirabel — magazine/media management cloud.
No historical data yet.
0.02%
MiniCRM — Hungarian CRM platform.
No historical data yet.
0.02%
SecuTix — Swiss ticketing platform.
No historical data yet.
0.02%
ADP — payroll and HR platform.
No historical data yet.
0.02%
Logicalware MailManager — UK helpdesk cloud.
No historical data yet.
0.02%
ClickFunnels — sales funnel builder.
No historical data yet.
0.02%
Visualsoft — UK e-commerce platform.
No historical data yet.
0.02%
Everbridge — critical event management.
No historical data yet.
0.02%
Hivebrite — community platform.
No historical data yet.
0.02%
Netigate — Swedish survey platform.
No historical data yet.
0.02%
Convento — German PR distribution.
No historical data yet.
0.02%
TravelClick (Amadeus Hospitality) — hotel CRM.
No historical data yet.
0.02%
WiseStamp — cloud email-signature management with a server-side stamping and relay service.
No historical data yet.
0.02%
GreenGeeks — web-hosting provider authorizing outbound mail from bundled hosting mailboxes.
No historical data yet.
0.02%
Kayako — customer service helpdesk.
No historical data yet.
0.02%
ReCharge — Shopify subscription billing.
No historical data yet.
0.02%
SuperOffice — Scandinavian CRM.
No historical data yet.
0.02%
CI Solution — German marketing software.
No historical data yet.
Mailigen (Pipedrive)
0.01%
Mailigen — Latvian SMB ESP, acquired by Pipedrive.
No historical data yet.
Zix SMB Hosted
0.01%
Zix (OpenText) — SMB email encryption + security.
No historical data yet.
MailGuard
0.01%
MailGuard — Australian email security gateway.
No historical data yet.
OxiMailing
0.01%
French newsletter and campaign-mailing platform.
No historical data yet.
Cyberimpact
0.01%
Canadian email-marketing platform focused on SMB and compliance.
No historical data yet.
Reply.io
0.01%
Reply.io — Ukrainian sales engagement and cold-email automation.
No historical data yet.
SqualoMail
0.01%
Italian email-marketing and automation platform.
No historical data yet.
Q4 Inc
0.01%
Q4 — investor-relations communications and IR press distribution.
No historical data yet.
Remarkety
0.01%
E-commerce email and SMS marketing automation.
No historical data yet.
Useinbox
0.01%
Useinbox — Turkish SMB email marketing platform.
No historical data yet.
FeedBlitz
0.01%
Newsletter and RSS-to-email delivery platform.
No historical data yet.
Constant Contact (CCSend)
0.01%
Constant Contact — US SMB newsletter ESP, decades-old leader.
No historical data yet.
Resulticks (Falconide)
0.01%
Resulticks Falconide — APAC marketing automation.
No historical data yet.
EuroMessage
0.01%
Turkey-origin omnichannel marketing and email platform.
No historical data yet.
Pepipost (Netcore)
0.01%
Pepipost — transactional email API by Netcore Cloud.
No historical data yet.
Data Driven Email
0.01%
Data Driven Email — analytics-led email service.
No historical data yet.
McAfee MxLogic
0.01%
McAfee MxLogic — legacy hosted email security.
No historical data yet.
Sophos Reflexion
0.01%
Sophos Reflexion (acquired) — anti-spam + total control email.
No historical data yet.
Theeml (RU-CENTER)
0.01%
Theeml — RU-CENTER email marketing platform.
No historical data yet.
Ontraport
0.01%
Ontraport — SMB CRM + marketing automation.
No historical data yet.
Get-N-Post
0.01%
Get-N-Post — Russian newsletter service.
No historical data yet.
ConvertKit
0.01%
Creator-focused newsletter platform (rebranded to Kit).
No historical data yet.
Zoho Campaigns (EU)
0.01%
Zoho Campaigns EU residency.
No historical data yet.
0.01%
Zoho Creator — low-code application platform sending workflow and application notifications.
No historical data yet.
0.01%
VoterVoice — grassroots advocacy platform.
No historical data yet.
0.01%
ClearSlide — sales engagement and content delivery.
No historical data yet.
0.01%
Adobe Workfront — work management platform.
No historical data yet.
0.01%
Pantheon — managed WordPress and Drupal hosting platform whose local MTA can send site email.
No historical data yet.
0.01%
Zoho Analytics — business-intelligence platform sending scheduled reports and data alerts.
No historical data yet.
0.01%
LiveAgent (Quality Unit) — helpdesk SaaS.
No historical data yet.
0.01%
Acquia — Drupal cloud platform (CMS notification email).
0.01%
Email signature management with server-side email routing.
No historical data yet.
0.01%
Digital Insight — NCR online banking platform.
No historical data yet.
0.01%
Hobsons — higher-ed CRM and student engagement.
No historical data yet.
Automattic — WordPress.com, Akismet, Jetpack notification email.
No historical data yet.
Pipedrive
0.00%
Estonia-origin sales CRM.
No historical data yet.
Veridyen
0.00%
Veridyen — Turkish anti-spam / email security gateway.
No historical data yet.
SiteSell SBI!
0.00%
SiteSell Solo Build It! — affiliate marketing newsletter platform.
No historical data yet.
Omnisend
0.00%
Lithuanian e-commerce marketing automation.
No historical data yet.
Braze
0.00%
Customer engagement platform popular with consumer apps.
No historical data yet.
Beehiiv
0.00%
Newsletter platform popular with creators and media.
No historical data yet.
MailPoet
0.00%
WordPress-native newsletter plugin (Automattic-owned).
No historical data yet.
Dotdigital
0.00%
UK marketing automation, enterprise B2C.
No historical data yet.
Markum
0.00%
Markum — Turkish web hosting + protection.
No historical data yet.
ActiveCampaign
0.00%
CRM + marketing automation for SMBs.
No historical data yet.
Flodesk
0.00%
Design-first newsletter for creators and small biz.
No historical data yet.
Zoho (campaigns)
0.00%
Zoho generic campaign SPF.
No historical data yet.
Mailtrap (testing)
0.00%
Email-testing sandbox + transactional sending.
No historical data yet.
SpamExperts
0.00%
SpamExperts SolarWinds white-label filter.
No historical data yet.
Iterable
0.00%
Cross-channel growth marketing platform (mid-market).
No historical data yet.
Moosend
0.00%
Greek SMB newsletter ESP (Sitecore group).
No historical data yet.
0.00%
InSales — Russian e-commerce platform; order notification email.
0.00%
Dutch SMB ERP sending invoices/notifications on customer behalf.
Shift4Shop (3dcart)
0.00%
Shift4Shop (3dcart) — e-commerce platform; order notification email.
No historical data yet.
GetCourse
0.00%
GetCourse — Russian online-course platform; learner notification email.
Megagroup
0.00%
Megagroup — Russian website builder.
0.00%
Box — US enterprise cloud content management and file-sharing platform sending share and collaboration notifications.
No historical data yet.
0.02%
Uncatalogued sender — description coming.
0.02%
Uncatalogued sender — description coming.
0.01%
Uncatalogued sender — description coming.
0.01%
Uncatalogued sender — description coming.
0.01%
Uncatalogued sender — description coming.
No historical data yet.
0.01%
Uncatalogued sender — description coming.
No historical data yet.
PayPal
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Apollo.io
0.00%
Uncatalogued sender — description coming.
No historical data yet.
SAP
0.00%
Uncatalogued sender — description coming.
No historical data yet.
ShipStation
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Yotpo
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Zoom
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Okta
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Wix
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Basecamp
0.00%
Uncatalogued sender — description coming.
Front
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Lemlist
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Atlassian
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Auth0 (Okta)
0.00%
Uncatalogued sender — description coming.
Calendly
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Freshworks
0.00%
Uncatalogued sender — description coming.
No historical data yet.
PandaDoc
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Bazaarvoice
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Outreach
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Slack
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Volusion
0.00%
Uncatalogued sender — description coming.
No historical data yet.
WeTransfer
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Webex (Cisco)
0.00%
Uncatalogued sender — description coming.
Asana
0.00%
Uncatalogued sender — description coming.
No historical data yet.
BambooHR
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Canvas LMS (Instructure)
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Dropbox
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Gong
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Kustomer
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Lever
0.00%
Uncatalogued sender — description coming.
No historical data yet.
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Webflow
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Wrike
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Adobe Acrobat Sign
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Duo Security (Cisco)
0.00%
Uncatalogued sender — description coming.
No historical data yet.
GitHub
0.00%
Uncatalogued sender — description coming.
No historical data yet.
GitLab
0.00%
Uncatalogued sender — description coming.
No historical data yet.
HelloSign (Dropbox Sign)
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Hotjar
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Insightly CRM
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Monday.com
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Moodle
0.00%
Uncatalogued sender — description coming.
No historical data yet.
RingCentral
0.00%
Uncatalogued sender — description coming.
No historical data yet.
SignNow
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Teamwork
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Thinkific
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Trello (Atlassian)
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Twilio
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Typeform
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Workable
0.00%
Uncatalogued sender — description coming.
No historical data yet.
Workday
0.00%
Uncatalogued sender — description coming.
No senders match the filter.
Source: OpenINTEL forward-DNS Tranco snapshot (2026-09-13).
Sender patterns: dictionaries/esps.py + dictionaries/saas_senders.py.
Descriptions: dictionaries/saas_meta.py.
Sparklines render only for senders tracked in history.json; new
senders will start appearing as future scans accumulate.