According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), ConvertKit is the email service provider (ESP) for 41 domains — 0.01% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
ConvertKit is an email service provider that powers campaigns for creators, online coaches, and independent business owners. In practice, it sits behind the infrastructure of smaller and mid-market digital-first sites, concentrated in the .com domain space rather than among the largest global brands.
For email teams and senders, ConvertKit's presence in the infrastructure layer means understanding its SPF practices is most relevant when your audience includes creators and independent professionals—a segment that does not define global email traffic but is disproportionately important for certain sender demographics. Knowing where ConvertKit sits in the email ecosystem helps both senders and mail administrators gauge deliverability context appropriately.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 6 | 14.6% |
| Top 1,000,000 | 32 | 78.0% |
| Unranked | 3 | 7.3% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 33 | 80.5% | |
| .org | 3 | 7.3% | |
| .co.uk | 1 | 2.4% | |
| .co | 1 | 2.4% | |
| .team | 1 | 2.4% | |
| .de | 1 | 2.4% | |
| .io | 1 | 2.4% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 41 domains.
| Type | Service | Domains | Share of ConvertKit users |
|---|---|---|---|
| Mailbox | Google Workspace | 29 | 70.7% |
| Mailbox | Self-Hosted | 6 | 14.6% |
| Mailbox | Hostinger | 1 | 2.4% |
| Mailbox | Unknown / Other | 1 | 2.4% |
| Mailbox | ProtonMail | 1 | 2.4% |
| Mailbox | 1&1 IONOS | 1 | 2.4% |
| ESP | Amazon SES | 10 | 24.4% |
| ESP | Mailgun | 4 | 9.8% |
| ESP | SendGrid (Twilio) | 4 | 9.8% |
| ESP | Freshdesk | 4 | 9.8% |
ConvertKit appears in SPF records across smaller sites in the .com space, where it serves as an authentication vector for creators and independent professionals sending mail. Understanding ConvertKit's SPF footprint is relevant not because it represents a majority of global email, but because correctly interpreting those records matters when evaluating authentication chains and sender reputation in contexts where your audience or policy scope includes smaller digital-first businesses.
See the full ConvertKit data page (KPI cards, trend, sample domains) →
Test against ConvertKit if your audience includes creators and independent professionals, though it is less critical than testing against major consumer platforms. For mail administrators, understanding its SPF practices is relevant when validating sender authentication chains in creator-focused contexts.
41 domains in the Tranco top-1M use ConvertKit as their email service provider (ESP) as of July 13, 2026 (0.01% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
ConvertKit accounts for 0.01% of SPF-publishing domains in the top 1M. Whether you should seed a test mailbox there depends on how much of your audience it represents — the co-usage table above shows the services it appears alongside most.
ConvertKit's largest TLD is .com (80.5% of its domains); it appears across 7 TLDs in total.