According to Live Direct Marketing's daily Tranco top-1M scan (July 12, 2026), Zendesk is the email service provider (ESP) for 23,872 domains — 3.87% of 617,244 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Zendesk is a customer-service platform operated by Zendesk, Inc. that manages support ticketing and email-based customer interactions. Organisations deploy Zendesk to handle inbound support requests and send outbound support replies, typically adding Zendesk's SPF include to their DNS records to authorise it as a mail sender from their domain.
In email infrastructure terms, Zendesk's SPF footprint is concentrated in the long tail of smaller and mid-market organisations rather than the largest brands, skews towards the .com domain space, and frequently appears alongside Google Workspace deployments. The platform has been losing market share in recent years relative to competing support platforms.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 117 | 0.5% |
| Top 10,000 | 665 | 2.8% |
| Top 100,000 | 4,504 | 18.9% |
| Top 1,000,000 | 17,239 | 72.2% |
| Unranked | 1,347 | 5.6% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 14,104 | 59.1% | |
| .de | 756 | 3.2% | |
| .co.uk | 586 | 2.5% | |
| .org | 547 | 2.3% | |
| .com.br | 542 | 2.3% | |
| .io | 455 | 1.9% | |
| .fr | 431 | 1.8% | |
| .com.au | 425 | 1.8% | |
| .net | 395 | 1.7% | |
| .nl | 361 | 1.5% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 23,872 domains.
| Type | Service | Domains | Share of Zendesk users |
|---|---|---|---|
| Mailbox | Google Workspace | 11,117 | 46.6% |
| Mailbox | Microsoft 365 | 6,888 | 28.9% |
| Mailbox | Unknown / Other | 932 | 3.9% |
| Mailbox | Mimecast | 787 | 3.3% |
| Mailbox | Self-Hosted | 766 | 3.2% |
| Mailbox | Proofpoint | 693 | 2.9% |
| ESP | Amazon SES | 4,406 | 18.5% |
| ESP | SendGrid (Twilio) | 3,947 | 16.5% |
| ESP | HubSpot | 3,243 | 13.6% |
| ESP | Mandrill | 3,036 | 12.7% |
Zendesk's SPF include represents authorisation for support email sent through the platform using the organisation's own domain. Support ESPs like Zendesk serve transactional mail with different authentication and reputation requirements from marketing ESPs, making them a distinct authorisation vector in an organisation's mail infrastructure.
See the full Zendesk data page (KPI cards, trend, sample domains) →
Zendesk is listed in your SPF record when your organisation sends customer-support replies and notifications through Zendesk using your own domain. The SPF include authorises Zendesk to send mail on your behalf from your domain.
23,872 domains in the Tranco top-1M use Zendesk as their email service provider (ESP) as of July 12, 2026 (3.87% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Zendesk accounts for 3.87% 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.
Zendesk has been stable — its share moved -0.00 pp over the last 30 days (as of July 12, 2026).
Zendesk's largest TLD is .com (59.1% of its domains); it appears across 342 TLDs in total.