Runbox email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), Runbox is the mailbox provider for 67 domains — 0.01% of 675,489 domains with MX records. Its strongest TLD is .com (26.9% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-09-24 DNS snapshot.
What Runbox represents in this dataset
Norwegian green-energy mailbox with strong privacy stance.
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 Runbox
Across 32 distinct TLDs its top three are .com (26.9%), .net (14.9%), .org (7.5%) — together 49.3% of the 67 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Amazon SES (ESP, 4 domains, 6.0% of them), followed by Mailgun (4.5%). 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 Runbox
What else the same 67 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of Runbox users |
|---|---|---|---|
| ESP | Amazon SES | 4 | 6.0% |
| ESP | Mailgun | 3 | 4.5% |
| ESP | Mailchimp | 2 | 3.0% |
| ESP | SendGrid (Twilio) | 1 | 1.5% |
| ESP | Help Scout | 1 | 1.5% |
| ESP | Brevo (ex-Sendinblue) | 1 | 1.5% |
| ESP | HubSpot | 1 | 1.5% |
| ESP | Postmark | 1 | 1.5% |
| ESP | SenderSRV | 1 | 1.5% |
TLD distribution (top 30 of 32)
Frequently asked questions
How many domains use Runbox?
67 domains in the Tranco top-1M use Runbox as their mailbox provider as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is Runbox's market share?
Runbox holds 0.01% 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 Runbox?
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 67 by Tranco rank)
Showing 67 of 67 domains.