HubSpot email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 12, 2026), HubSpot is the email service provider (ESP) for 19,596 domains — 3.11% of 629,828 SPF-publishing domains. Its share has been stable over the last 30 days. Its strongest TLD is .com (65.1% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-12 DNS snapshot.
What HubSpot represents in this dataset
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.
What the 2026-09-12 snapshot shows about HubSpot
Across 282 distinct TLDs its top three are .com (65.1%), .org (4.7%), .io (3.9%) — together 73.7% of the 19,596 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, 9,550 domains, 48.7% of them), followed by Microsoft 365 (32.9%). Its share of SPF-publishing domains has not moved measurably in 30 days. 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 (2026-09-12); 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 HubSpot
What else the same 19,596 domains use — cross-tabulated from the same daily snapshot (2026-09-12).
| Type | Service | Domains | Share of HubSpot users |
|---|---|---|---|
| Mailbox | Google Workspace | 9,550 | 48.7% |
| Mailbox | Microsoft 365 | 6,455 | 32.9% |
| Mailbox | Mimecast | 767 | 3.9% |
| Mailbox | Proofpoint | 458 | 2.3% |
| Mailbox | Self-Hosted | 393 | 2.0% |
| Mailbox | Unknown / Other | 373 | 1.9% |
| ESP | Amazon SES | 3,524 | 18.0% |
| ESP | SendGrid (Twilio) | 3,234 | 16.5% |
| ESP | Zendesk | 3,220 | 16.4% |
| ESP | Salesforce | 2,535 | 12.9% |
TLD distribution (top 30 of 282)
Frequently asked questions
How many domains use HubSpot?
19,596 domains in the Tranco top-1M use HubSpot as their email service provider (ESP) as of September 12, 2026, according to Live Direct Marketing's daily DNS scan.
What is HubSpot's market share?
HubSpot holds 3.11% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-12). The number is recomputed every day.
Is HubSpot growing or declining?
HubSpot's share has been stable over the last 30 days (±0.01 pp).
What are the biggest alternatives to HubSpot?
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 2026-09-12).
Largest email service provider (ESP)s in this category
Amazon SES (6.18%) · SendGrid (Twilio) (4.63%) · Mailgun (4.01%) · Zendesk (3.76%) · Mailchimp (3.57%) · Mandrill (3.25%) · Salesforce (2.55%) · Mailjet (Sinch) (2.12%) · Cloudflare Email Routing (1.94%) · Brevo (ex-Sendinblue) (1.49%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 19,596 domains.