Keap (Infusionsoft) email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 12, 2026), Keap (Infusionsoft) is the email service provider (ESP) for 332 domains — 0.05% of 629,828 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 332 domains in the Tranco top-1M use Keap (Infusionsoft) (0.05% of SPF-publishing domains).
- Snapshot date: 2026-09-12 — recomputed every day.
- Strongest TLD: .com (74.4% of its domains).
- Most co-used service: Google Workspace.
- Directory category: email service provider.
Why Keap (Infusionsoft) appears in this category
CRM + email marketing for very-small businesses.
We classify it as a email service provider from include: mechanisms in the SPF record matching a maintained provider rule. This is infrastructure attribution from public DNS, not evidence of a direct contract or exclusive use.
Keap (formerly Infusionsoft) is an email service provider and customer relationship management platform operated by Keap Inc., designed to centralise customer communications and sales automation for small to mid-market businesses.
Keap's observable footprint in the email infrastructure landscape concentrates among smaller organisations within the .com namespace, where it frequently appears alongside Google Workspace. For those managing email deliverability, this distribution pattern indicates that Keap-hosted infrastructure is a regular presence in business communications outside the largest enterprise segment.
Where Keap (Infusionsoft) sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 30 | 9.0% |
| Top 1,000,000 | 300 | 90.4% |
| Unranked | 2 | 0.6% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 247 | 74.4% | |
| .net | 20 | 6.0% | |
| .org | 16 | 4.8% | |
| .co.uk | 8 | 2.4% | |
| .com.au | 8 | 2.4% | |
| .it | 7 | 2.1% | |
| .edu | 5 | 1.5% | |
| .org.uk | 2 | 0.6% | |
| .nl | 2 | 0.6% | |
| .no | 2 | 0.6% |
What Keap (Infusionsoft) users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 332 domains.
| Type | Service | Domains | Share of Keap (Infusionsoft) users |
|---|---|---|---|
| Mailbox | Google Workspace | 172 | 51.8% |
| Mailbox | Microsoft 365 | 78 | 23.5% |
| Mailbox | Self-Hosted | 22 | 6.6% |
| Mailbox | Unknown / Other | 12 | 3.6% |
| Mailbox | Barracuda | 9 | 2.7% |
| Mailbox | Mimecast | 6 | 1.8% |
| ESP | Zendesk | 52 | 15.7% |
| ESP | SendGrid (Twilio) | 48 | 14.5% |
| ESP | HubSpot | 40 | 12.0% |
| ESP | Mailgun | 38 | 11.4% |
SPF includes and multi-tenant mail infrastructure
Keap appears in email authentication records through SPF include mechanisms, which indicate when organisations authorise Keap to send email on their behalf. The concentration of these authorisations among smaller sites, predominantly within the .com space, reflects Keap's market positioning as a unified email and CRM service for mid-market and small-business customers seeking integrated communications and sales tools.
See the full Keap (Infusionsoft) data page (KPI cards, trend, sample domains) →
Run a free inbox-placement test across Gmail, Outlook, Yahoo and more — see exactly where your mail lands and why.
Frequently asked questions
What is Keap and why does it appear in email SPF records?
Keap (formerly Infusionsoft) is an email service provider and CRM platform that hosts email infrastructure for small to mid-market businesses. It appears in SPF records when customers authorise Keap to send email on their behalf, as part of their broader sales and customer communications automation.
How many domains use Keap (Infusionsoft)?
332 domains in the Tranco top-1M use Keap (Infusionsoft) as their email service provider (ESP) as of September 12, 2026 (0.05% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is Keap (Infusionsoft) common enough to affect email deliverability testing?
Keap (Infusionsoft) accounts for 0.05% 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.
Which countries or TLDs use Keap (Infusionsoft) most?
Keap (Infusionsoft)'s largest TLD is .com (74.4% of its domains); it appears across 24 TLDs in total.