esp
According to Live Direct Marketing's daily Tranco top-1M scan (July 26, 2026), HubSpot is the email service provider (ESP) for 20,129 domains — 3.19% of 630,738 SPF-publishing domains. Over the last 30 days its share declined by 0.03 pp. Its strongest TLD is .com (65.1% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-07-26 DNS snapshot.
HubSpot CRM/Marketing Hub email — popular SMB inbound marketing platform.
Directory category: Esp. 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 291 distinct TLDs its top three are .com (65.1%), .org (4.8%), .io (4.0%) — together 73.9% of the 20,129 domains, which makes the footprint narrow — three TLDs cover most of it, which is typical of a regional or single-market operator. The service most often observed on the same domains is Google Workspace (Mailbox, 9,790 domains, 48.6% of them), followed by Microsoft 365 (32.7%). Its share of SPF-publishing domains moved -0.03 pp in 30 days — inside the daily noise of list rotation. 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 20,129 domains use — cross-tabulated from the same daily snapshot (2026-07-26).
| Type | Service | Domains | Share of HubSpot users |
|---|---|---|---|
| Mailbox | Google Workspace | 9,790 | 48.6% |
| Mailbox | Microsoft 365 | 6,574 | 32.7% |
| Mailbox | Mimecast | 833 | 4.1% |
| Mailbox | Proofpoint | 467 | 2.3% |
| Mailbox | Unknown / Other | 425 | 2.1% |
| Mailbox | Self-Hosted | 400 | 2.0% |
| ESP | Amazon SES | 3,567 | 17.7% |
| ESP | SendGrid (Twilio) | 3,322 | 16.5% |
| ESP | Zendesk | 3,291 | 16.3% |
| ESP | Salesforce | 2,601 | 12.9% |
20,129 domains in the Tranco top-1M use HubSpot as their email service provider (ESP) as of July 26, 2026, according to Live Direct Marketing's daily DNS scan.
HubSpot holds 3.19% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-07-26). The number is recomputed every day.
HubSpot'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, Zendesk, Mailchimp (as of 2026-07-26).
Amazon SES (6.17%) · SendGrid (Twilio) (4.76%) · Mailgun (4.11%) · Zendesk (3.83%) · Mailchimp (3.70%) · Mandrill (3.36%) · Salesforce (2.62%) · Mailjet (Sinch) (2.13%) · Cloudflare Email Routing (1.82%) · Brevo (ex-Sendinblue) (1.45%)
Showing 100 of 20,129 domains.