According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Zendesk is the SaaS sender for 35 domains — 0.01% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Zendesk is a cloud-based customer support and ticketing platform operated by Zendesk, Inc. It provides helpdesk functionality, live chat, email support, and case management tools for organisations managing customer communications. The platform sends transactional notifications and routed customer replies on behalf of client domains, requiring DNS-level authorisation via SPF.
Across the Tranco top-1 million website list, Zendesk's SPF presence clusters in smaller and mid-market organisations rather than global enterprises, with particular concentration in .com registrations. The platform appears frequently in environments also running Microsoft 365, reflecting adoption patterns in organisations assembling heterogeneous cloud stacks. For email infrastructure operators, Zendesk therefore represents a common secondary sender in mixed-platform configurations.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 5 | 14.3% |
| Top 1,000,000 | 30 | 85.7% |
| Unranked | 0 | 0.0% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 25 | 71.4% | |
| .co.uk | 2 | 5.7% | |
| .org | 1 | 2.9% | |
| .nl | 1 | 2.9% | |
| .com.br | 1 | 2.9% | |
| .edu | 1 | 2.9% | |
| .at | 1 | 2.9% | |
| .jp | 1 | 2.9% | |
| .co | 1 | 2.9% | |
| .co.il | 1 | 2.9% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 35 domains.
| Type | Service | Domains | Share of Zendesk users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 20 | 57.1% |
| Mailbox | Google Workspace | 4 | 11.4% |
| Mailbox | Proofpoint | 3 | 8.6% |
| Mailbox | Mimecast | 3 | 8.6% |
| Mailbox | Self-Hosted | 1 | 2.9% |
| Mailbox | Servicio de Correo (Arsys, ES) | 1 | 2.9% |
Zendesk requires organisations to publish SPF include mechanisms (typically include:zendesk.com or service-specific variants) in their domain's DNS to authorise Zendesk's sending infrastructure. This adds a sender-authorisation entry to any existing SPF record, increasing policy complexity when combined with other SaaS platforms. Proper SPF setup is foundational; receiving systems may reject or flag Zendesk-originated mail from a domain lacking the corresponding include, making DNS validation a routine part of Zendesk deployment audits.
See the full Zendesk data page (KPI cards, trend, sample domains) →
Yes — Zendesk requires an SPF include mechanism in your domain's DNS to authorise its sending servers. Without it, mail from Zendesk may be rejected or flagged as suspicious by recipient systems.
35 domains in the Tranco top-1M use Zendesk as their SaaS sender as of July 13, 2026 (0.01% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Zendesk 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.
Zendesk's largest TLD is .com (71.4% of its domains); it appears across 10 TLDs in total.