esp
According to Live Direct Marketing's daily Tranco top-1M scan (July 12, 2026), ConvertKit is the email service provider (ESP) for 41 domains — 0.01% of 617,244 SPF-publishing domains. Its strongest TLD is .com (80.5% of its domains). Detection: include: mechanisms in the SPF record.
What else the same 41 domains use — cross-tabulated from the same daily snapshot (2026-07-12).
| Type | Service | Domains | Share of ConvertKit users |
|---|---|---|---|
| Mailbox | Google Workspace | 29 | 70.7% |
| Mailbox | Self-Hosted | 6 | 14.6% |
| Mailbox | ProtonMail | 1 | 2.4% |
| Mailbox | 1&1 IONOS | 1 | 2.4% |
| Mailbox | Namecheap PrivateEmail | 1 | 2.4% |
| Mailbox | Cloudflare Email Routing | 1 | 2.4% |
| ESP | Amazon SES | 10 | 24.4% |
| ESP | Freshdesk | 4 | 9.8% |
| ESP | Postmark | 4 | 9.8% |
| ESP | Mailgun | 4 | 9.8% |
41 domains in the Tranco top-1M use ConvertKit as their email service provider (ESP) as of July 12, 2026, according to Live Direct Marketing's daily DNS scan.
ConvertKit holds 0.01% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-07-12). The number is recomputed every day.
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 2026-07-12).
Amazon SES (6.21%) · SendGrid (Twilio) (4.75%) · Mailgun (4.11%) · Zendesk (3.87%) · Mailchimp (3.69%) · Mandrill (3.36%) · HubSpot (3.18%) · Salesforce (2.62%) · Mailjet (Sinch) (2.13%) · Cloudflare Email Routing (1.80%)
Showing 41 of 41 domains.