Sailthru email provider statistics and deliverability context
← Email Stats homeesp
According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), Sailthru is the email service provider (ESP) for 620 domains — 0.10% of 637,420 SPF-publishing domains. Its strongest TLD is .com (78.9% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-24 DNS snapshot.
What Sailthru represents in this dataset
Marigold Sailthru — publisher-focused personalisation ESP.
Directory category: Esp. The classification comes from include: mechanisms in the SPF record. It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
What the 2026-09-24 snapshot shows about Sailthru
Across 37 distinct TLDs its top three are .com (78.9%), .org (5.0%), .co.uk (3.4%) — together 87.3% of the 620 domains, which makes the footprint narrow — three TLDs cover most of it, which is typical of a regional or single-market operator. The service most often observed on the same domains is Google Workspace (Mailbox, 296 domains, 47.7% of them), followed by Microsoft 365 (26.3%). Directly comparable by the same detection rule: Amazon SES, SendGrid (Twilio), Mailgun. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-09-24); a domain appears here when its published records match the include: mechanisms in the SPF record rule, which is an infrastructure fact, not a commercial relationship.
Commonly used together with Sailthru
What else the same 620 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of Sailthru users |
|---|---|---|---|
| Mailbox | Google Workspace | 296 | 47.7% |
| Mailbox | Microsoft 365 | 163 | 26.3% |
| Mailbox | Mimecast | 51 | 8.2% |
| Mailbox | Proofpoint | 42 | 6.8% |
| Mailbox | Unknown / Other | 20 | 3.2% |
| Mailbox | Self-Hosted | 8 | 1.3% |
| ESP | Amazon SES | 96 | 15.5% |
| ESP | Mandrill | 91 | 14.7% |
| ESP | SendGrid (Twilio) | 88 | 14.2% |
| ESP | Mailchimp | 73 | 11.8% |
TLD distribution (top 30 of 37)
Frequently asked questions
How many domains use Sailthru?
620 domains in the Tranco top-1M use Sailthru as their email service provider (ESP) as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is Sailthru's market share?
Sailthru holds 0.10% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-24). The number is recomputed every day.
What are the biggest alternatives to Sailthru?
The largest email service provider (ESP)s in the same category by Tranco top-1M share are: Amazon SES, SendGrid (Twilio), Mailgun, Zendesk, Mailchimp (as of 2026-09-24).
Largest email service provider (ESP)s in this category
Amazon SES (6.23%) · SendGrid (Twilio) (4.68%) · Mailgun (4.01%) · Zendesk (3.77%) · Mailchimp (3.61%) · Mandrill (3.26%) · HubSpot (3.18%) · Salesforce (2.57%) · Mailjet (Sinch) (2.14%) · Cloudflare Email Routing (1.96%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 620 domains.