ProtonMail email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), ProtonMail is the mailbox provider for 1,787 domains — 0.26% of 675,489 domains with MX records. Its strongest TLD is .com (41.9% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-09-24 DNS snapshot.
What ProtonMail represents in this dataset
Swiss-based end-to-end encrypted mailbox. Popular with privacy-conscious users.
Directory category: Mailbox. The classification comes from primary MX record (lowest preference). It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
What the 2026-09-24 snapshot shows about ProtonMail
Across 192 distinct TLDs its top three are .com (41.9%), .org (8.8%), .net (7.3%) — together 58.1% of the 1,787 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Mailgun (ESP, 63 domains, 3.5% of them), followed by Amazon SES (3.5%). Directly comparable by the same detection rule: Self-Hosted, Google Workspace, Microsoft 365. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-09-24); a domain appears here when its published records match the primary MX record (lowest preference) rule, which is an infrastructure fact, not a commercial relationship.
Commonly used together with ProtonMail
What else the same 1,787 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of ProtonMail users |
|---|---|---|---|
| ESP | Mailgun | 63 | 3.5% |
| ESP | Amazon SES | 62 | 3.5% |
| ESP | SendGrid (Twilio) | 36 | 2.0% |
| ESP | Mailjet (Sinch) | 31 | 1.7% |
| ESP | MailerLite | 29 | 1.6% |
| ESP | Brevo (ex-Sendinblue) | 28 | 1.6% |
| ESP | Zendesk | 19 | 1.1% |
| ESP | Mailchimp | 17 | 1.0% |
| ESP | MailerSend | 16 | 0.9% |
| ESP | Mandrill | 12 | 0.7% |
TLD distribution (top 30 of 192)
Frequently asked questions
How many domains use ProtonMail?
1,787 domains in the Tranco top-1M use ProtonMail as their mailbox provider as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is ProtonMail's market share?
ProtonMail holds 0.26% of domains with MX records in the Tranco top-1M (snapshot of 2026-09-24). The number is recomputed every day.
What are the biggest alternatives to ProtonMail?
The largest mailbox providers in the same category by Tranco top-1M share are: Self-Hosted, Google Workspace, Microsoft 365, Unknown / Other, Generic / unmatched (mx*.*) (as of 2026-09-24).
Largest mailbox providers in this category
Self-Hosted (22.56%) · Google Workspace (21.58%) · Microsoft 365 (17.03%) · Unknown / Other (6.68%) · Generic / unmatched (mx*.*) (2.53%) · Generic / unmatched (mail.*) (1.93%) · Proofpoint (1.86%) · Cloudflare Email Routing (1.76%) · Yandex 360 (1.67%) · Mimecast (1.47%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 1,787 domains.