esp
According to Live Direct Marketing's daily Tranco top-1M scan (July 26, 2026), Zendesk is the email service provider (ESP) for 24,151 domains — 3.83% of 630,738 SPF-publishing domains. Over the last 30 days its share declined by 0.03 pp, and -0.17 pp year-over-year. Its strongest TLD is .com (59.0% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-07-26 DNS snapshot.
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.
Across 340 distinct TLDs its top three are .com (59.0%), .de (3.2%), .co.uk (2.5%) — together 64.7% of the 24,151 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, 11,221 domains, 46.5% of them), followed by Microsoft 365 (29.1%). 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 -0.17 pp, so the 30-day move is consistent with 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 (2026-07-26); 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.
What else the same 24,151 domains use — cross-tabulated from the same daily snapshot (2026-07-26).
| Type | Service | Domains | Share of Zendesk users |
|---|---|---|---|
| Mailbox | Google Workspace | 11,221 | 46.5% |
| Mailbox | Microsoft 365 | 7,028 | 29.1% |
| Mailbox | Unknown / Other | 900 | 3.7% |
| Mailbox | Mimecast | 795 | 3.3% |
| Mailbox | Self-Hosted | 770 | 3.2% |
| Mailbox | Proofpoint | 728 | 3.0% |
| ESP | Amazon SES | 4,448 | 18.4% |
| ESP | SendGrid (Twilio) | 4,011 | 16.6% |
| ESP | HubSpot | 3,289 | 13.6% |
| ESP | Mandrill | 3,058 | 12.7% |
24,151 domains in the Tranco top-1M use Zendesk as their email service provider (ESP) as of July 26, 2026, according to Live Direct Marketing's daily DNS scan.
Zendesk holds 3.83% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-07-26). The number is recomputed every day.
Zendesk's share declined by 0.03 percentage points over the last 30 days (as of July 26, 2026).
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 2026-07-26).
Amazon SES (6.17%) · SendGrid (Twilio) (4.76%) · Mailgun (4.11%) · Mailchimp (3.70%) · Mandrill (3.36%) · HubSpot (3.19%) · Salesforce (2.62%) · Mailjet (Sinch) (2.13%) · Cloudflare Email Routing (1.82%) · Brevo (ex-Sendinblue) (1.45%)
Showing 100 of 24,151 domains.