According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Act-On Software is the email service provider (ESP) for 460 domains — 0.07% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Act-On Software is a marketing automation platform and email service provider that enables organisations to manage and send email campaigns, conduct lead nurturing, and automate marketing workflows. It delivers these messages through its own hosted infrastructure, which organisations authorise via email authentication mechanisms like SPF.
Act-On's footprint in email infrastructure is concentrated among smaller and mid-market organisations rather than enterprise brands, predominantly in the .com domain space. It frequently appears in email authentication records alongside Microsoft 365, reflecting adoption by organisations that integrate marketing automation with Microsoft's productivity platform.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.2% |
| Top 10,000 | 3 | 0.7% |
| Top 100,000 | 53 | 11.5% |
| Top 1,000,000 | 371 | 80.7% |
| Unranked | 32 | 7.0% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 341 | 74.1% | |
| .org | 65 | 14.1% | |
| .net | 11 | 2.4% | |
| .ca | 7 | 1.5% | |
| .co.uk | 6 | 1.3% | |
| .edu | 6 | 1.3% | |
| .co.nz | 3 | 0.7% | |
| .com.au | 2 | 0.4% | |
| .de | 2 | 0.4% | |
| .ch | 2 | 0.4% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 460 domains.
| Type | Service | Domains | Share of Act-On Software users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 226 | 49.1% |
| Mailbox | Google Workspace | 59 | 12.8% |
| Mailbox | Mimecast | 52 | 11.3% |
| Mailbox | Unknown / Other | 27 | 5.9% |
| Mailbox | Proofpoint | 26 | 5.7% |
| Mailbox | Barracuda | 21 | 4.6% |
| ESP | Salesforce | 69 | 15.0% |
| ESP | SendGrid (Twilio) | 60 | 13.0% |
| ESP | Mimecast | 55 | 12.0% |
| ESP | Amazon SES | 49 | 10.7% |
Act-On Software appears in domain SPF records as an authorised external sender, permitting Act-On's infrastructure to send email on behalf of customer domains—typically marketing campaigns and automated sequences. This means a domain's email reputation is partly dependent on Act-On's operational standing, and issues with Act-On's sending practices or infrastructure reputation can directly affect deliverability of mail sent through it.
See the full Act-On Software data page (KPI cards, trend, sample domains) →
Act-On Software is a marketing automation and email service provider used by organisations to send campaigns and automated email sequences. Its infrastructure appears in SPF authentication records as an authorised sender on behalf of customer domains.
460 domains in the Tranco top-1M use Act-On Software as their email service provider (ESP) as of July 13, 2026 (0.07% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Act-On Software accounts for 0.07% 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.
Act-On Software's largest TLD is .com (74.1% of its domains); it appears across 23 TLDs in total.