ConvertKit email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), ConvertKit is the email service provider (ESP) for 36 domains — 0.01% of 637,420 SPF-publishing domains. Its strongest TLD is .com (80.6% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-24 DNS snapshot.
What ConvertKit represents in this dataset
Creator-focused newsletter platform (rebranded to Kit).
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 ConvertKit
Across 6 distinct TLDs its top three are .com (80.6%), .org (8.3%), .de (2.8%) — together 91.7% of the 36 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, 24 domains, 66.7% of them), followed by Self-Hosted (16.7%). 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 ConvertKit
What else the same 36 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of ConvertKit users |
|---|---|---|---|
| Mailbox | Google Workspace | 24 | 66.7% |
| Mailbox | Self-Hosted | 6 | 16.7% |
| Mailbox | ProtonMail | 1 | 2.8% |
| Mailbox | Cloudflare Email Routing | 1 | 2.8% |
| Mailbox | 1&1 IONOS | 1 | 2.8% |
| Mailbox | Unknown / Other | 1 | 2.8% |
| ESP | Amazon SES | 7 | 19.4% |
| ESP | SendGrid (Twilio) | 4 | 11.1% |
| ESP | Mailgun | 4 | 11.1% |
| ESP | Postmark | 3 | 8.3% |
TLD distribution (top 6 of 6)
Frequently asked questions
How many domains use ConvertKit?
36 domains in the Tranco top-1M use ConvertKit as their email service provider (ESP) as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is ConvertKit's market share?
ConvertKit 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 ConvertKit?
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 36 by Tranco rank)
Showing 36 of 36 domains.