esp
According to Live Direct Marketing's daily Tranco top-1M scan (July 26, 2026), Mailchimp is the email service provider (ESP) for 23,344 domains — 3.70% of 630,738 SPF-publishing domains. Its share has been stable over the last 30 days. Its strongest TLD is .com (50.7% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-07-26 DNS snapshot.
Intuit Mailchimp — newsletter and marketing automation, dominant SMB ESP in North America and EU.
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.
Across 321 distinct TLDs its top three are .com (50.7%), .org (9.0%), .nl (2.7%) — together 62.4% of the 23,344 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Google Workspace (Mailbox, 9,255 domains, 39.6% of them), followed by Microsoft 365 (32.2%). Its share of SPF-publishing domains has not moved measurably in 30 days. Year-over-year the share is -0.37 pp, so the 30-day move is consistent with the longer trend. 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 (2026-07-26); 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.
What else the same 23,344 domains use — cross-tabulated from the same daily snapshot (2026-07-26).
| Type | Service | Domains | Share of Mailchimp users |
|---|---|---|---|
| Mailbox | Google Workspace | 9,255 | 39.6% |
| Mailbox | Microsoft 365 | 7,528 | 32.2% |
| Mailbox | Self-Hosted | 1,418 | 6.1% |
| Mailbox | Unknown / Other | 1,027 | 4.4% |
| Mailbox | Mimecast | 708 | 3.0% |
| Mailbox | Proofpoint | 455 | 1.9% |
| ESP | Mandrill | 4,559 | 19.5% |
| ESP | Amazon SES | 3,298 | 14.1% |
| ESP | SendGrid (Twilio) | 3,148 | 13.5% |
| ESP | Zendesk | 3,030 | 13.0% |
23,344 domains in the Tranco top-1M use Mailchimp as their email service provider (ESP) as of July 26, 2026, according to Live Direct Marketing's daily DNS scan.
Mailchimp holds 3.70% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-07-26). The number is recomputed every day.
Mailchimp's share has been stable over the last 30 days (±0.01 pp).
The largest email service provider (ESP)s in the same category by Tranco top-1M share are: Amazon SES, SendGrid (Twilio), Mailgun, Zendesk, Mandrill (as of 2026-07-26).
Amazon SES (6.17%) · SendGrid (Twilio) (4.76%) · Mailgun (4.11%) · Zendesk (3.83%) · Mandrill (3.36%) · HubSpot (3.19%) · Salesforce (2.62%) · Mailjet (Sinch) (2.13%) · Cloudflare Email Routing (1.82%) · Brevo (ex-Sendinblue) (1.45%)
Showing 100 of 23,344 domains.