Selzy email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), Selzy is the email service provider (ESP) for 173 domains — 0.03% of 637,420 SPF-publishing domains. Its strongest TLD is .com (35.3% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-24 DNS snapshot.
What Selzy represents in this dataset
Selzy — email marketing platform (formerly Estismail).
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 2026-09-24 snapshot shows about Selzy
Across 42 distinct TLDs its top three are .com (35.3%), .ua (11.0%), .kz (9.2%) — together 55.5% of the 173 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, 75 domains, 43.4% of them), followed by Self-Hosted (19.1%). 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 (2026-09-24); 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 Selzy
What else the same 173 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of Selzy users |
|---|---|---|---|
| Mailbox | Google Workspace | 75 | 43.4% |
| Mailbox | Self-Hosted | 33 | 19.1% |
| Mailbox | Microsoft 365 | 31 | 17.9% |
| Mailbox | Yandex 360 | 6 | 3.5% |
| Mailbox | Unknown / Other | 6 | 3.5% |
| Mailbox | Ukraine.com.ua hosting | 5 | 2.9% |
| ESP | Amazon SES | 25 | 14.5% |
| ESP | SendPulse | 24 | 13.9% |
| ESP | Unisender (RU) | 24 | 13.9% |
| ESP | eSputnik (UA) | 16 | 9.2% |
TLD distribution (top 30 of 42)
Frequently asked questions
How many domains use Selzy?
173 domains in the Tranco top-1M use Selzy as their email service provider (ESP) as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is Selzy's market share?
Selzy holds 0.03% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-24). The number is recomputed every day.
What are the biggest alternatives to Selzy?
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 2026-09-24).
Largest email service provider (ESP)s in this category
Amazon SES (6.23%) · SendGrid (Twilio) (4.68%) · Mailgun (4.01%) · Zendesk (3.77%) · Mailchimp (3.61%) · Mandrill (3.26%) · HubSpot (3.18%) · Salesforce (2.57%) · Mailjet (Sinch) (2.14%) · Cloudflare Email Routing (1.96%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 173 domains.