Reply.io email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), Reply.io is the email service provider (ESP) for 90 domains — 0.01% of 637,420 SPF-publishing domains. Its strongest TLD is .com (81.1% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-24 DNS snapshot.
What Reply.io represents in this dataset
Reply.io — Ukrainian sales engagement and cold-email automation.
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 Reply.io
Across 9 distinct TLDs its top three are .com (81.1%), .co (7.8%), .io (3.3%) — together 92.2% of the 90 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, 79 domains, 87.8% of them), followed by Microsoft 365 (4.4%). 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 Reply.io
What else the same 90 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of Reply.io users |
|---|---|---|---|
| Mailbox | Google Workspace | 79 | 87.8% |
| Mailbox | Microsoft 365 | 4 | 4.4% |
| Mailbox | Mimecast | 3 | 3.3% |
| Mailbox | Self-Hosted | 1 | 1.1% |
| Mailbox | 1&1 IONOS | 1 | 1.1% |
| Mailbox | Trend Micro | 1 | 1.1% |
| ESP | HubSpot | 31 | 34.4% |
| ESP | Zendesk | 18 | 20.0% |
| ESP | Amazon SES | 18 | 20.0% |
| ESP | Mailchimp | 17 | 18.9% |
TLD distribution (top 9 of 9)
Frequently asked questions
How many domains use Reply.io?
90 domains in the Tranco top-1M use Reply.io as their email service provider (ESP) as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is Reply.io's market share?
Reply.io holds 0.01% 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 Reply.io?
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 90 by Tranco rank)
Showing 90 of 90 domains.