Zendesk email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 19, 2026), Zendesk is the email service provider (ESP) for 24,141 domains — 3.76% of 642,799 SPF-publishing domains. Over the last 30 days its share grew by 0.03 pp, and -0.27 pp year-over-year. Its strongest TLD is .com (58.7% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-19 DNS snapshot.
What Zendesk represents in this dataset
Enterprise customer support platform.
Directory category: Saas. The classification comes from include: mechanisms in the SPF record. It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
What the 2026-09-19 snapshot shows about Zendesk
Across 343 distinct TLDs its top three are .com (58.7%), .de (3.2%), .co.uk (2.4%) — together 64.3% of the 24,141 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Google Workspace (Mailbox, 11,241 domains, 46.6% of them), followed by Microsoft 365 (29.3%). Its share of SPF-publishing domains moved +0.03 pp in 30 days — inside the daily noise of list rotation. Year-over-year the share is -0.27 pp, so the 30-day move is against the longer trend. Directly comparable by the same detection rule: Amazon SES, SendGrid (Twilio), Mailgun. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-09-19); a domain appears here when its published records match the include: mechanisms in the SPF record rule, which is an infrastructure fact, not a commercial relationship.
Commonly used together with Zendesk
What else the same 24,141 domains use — cross-tabulated from the same daily snapshot (2026-09-19).
| Type | Service | Domains | Share of Zendesk users |
|---|---|---|---|
| Mailbox | Google Workspace | 11,241 | 46.6% |
| Mailbox | Microsoft 365 | 7,081 | 29.3% |
| Mailbox | Unknown / Other | 834 | 3.5% |
| Mailbox | Self-Hosted | 776 | 3.2% |
| Mailbox | Mimecast | 761 | 3.2% |
| Mailbox | Proofpoint | 750 | 3.1% |
| ESP | Amazon SES | 4,457 | 18.5% |
| ESP | SendGrid (Twilio) | 3,953 | 16.4% |
| ESP | HubSpot | 3,311 | 13.7% |
| ESP | Mandrill | 3,037 | 12.6% |
TLD distribution (top 30 of 343)
Frequently asked questions
How many domains use Zendesk?
24,141 domains in the Tranco top-1M use Zendesk as their email service provider (ESP) as of September 19, 2026, according to Live Direct Marketing's daily DNS scan.
What is Zendesk's market share?
Zendesk holds 3.76% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-19). The number is recomputed every day.
Is Zendesk growing or declining?
Zendesk's share grew by 0.03 percentage points over the last 30 days (as of September 19, 2026).
What are the biggest alternatives to Zendesk?
The largest email service provider (ESP)s in the same category by Tranco top-1M share are: Amazon SES, SendGrid (Twilio), Mailgun, Mailchimp, Mandrill (as of 2026-09-19).
Largest email service provider (ESP)s in this category
Amazon SES (6.20%) · SendGrid (Twilio) (4.65%) · Mailgun (4.00%) · Mailchimp (3.59%) · Mandrill (3.25%) · HubSpot (3.15%) · Salesforce (2.55%) · Mailjet (Sinch) (2.13%) · Cloudflare Email Routing (1.96%) · Brevo (ex-Sendinblue) (1.49%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 24,141 domains.