Sendsay email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 12, 2026), Sendsay is the email service provider (ESP) for 650 domains — 0.10% of 629,828 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 650 domains in the Tranco top-1M use Sendsay (0.10% of SPF-publishing domains).
- Snapshot date: 2026-09-12 — recomputed every day.
- Strongest TLD: .ru (73.8% of its domains).
- Most co-used service: Self-Hosted.
- Directory category: email service provider.
Why Sendsay appears in this category
Sendsay — Russian email marketing platform with surveys + automation.
We classify it as a email service provider from include: mechanisms in the SPF record matching a maintained provider rule. This is infrastructure attribution from public DNS, not evidence of a direct contract or exclusive use.
Sendsay is a Russian email marketing and delivery platform. It provides email campaign management and infrastructure services, and appears in sender authentication records (SPF) when organisations route mail through its systems.
Its footprint is concentrated in the long tail of smaller websites, predominantly in the .ru domain space, and often appears alongside self-hosted mail infrastructure. This regional distribution and hybrid deployment pattern means senders and mailbox providers encounter Sendsay primarily in specific markets rather than across global brands.
Where Sendsay sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 5 | 0.8% |
| Top 10,000 | 20 | 3.1% |
| Top 100,000 | 157 | 24.2% |
| Top 1,000,000 | 468 | 72.0% |
| Unranked | 0 | 0.0% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .ru | 480 | 73.8% | |
| .com | 67 | 10.3% | |
| .online | 10 | 1.5% | |
| .io | 8 | 1.2% | |
| .kz | 8 | 1.2% | |
| .pro | 7 | 1.1% | |
| .net | 7 | 1.1% | |
| .tech | 4 | 0.6% | |
| .by | 4 | 0.6% | |
| .su | 3 | 0.5% |
What Sendsay users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 650 domains.
| Type | Service | Domains | Share of Sendsay users |
|---|---|---|---|
| Mailbox | Self-Hosted | 192 | 29.5% |
| Mailbox | Yandex 360 | 178 | 27.4% |
| Mailbox | Mail.ru for Business | 52 | 8.0% |
| Mailbox | Google Workspace | 51 | 7.8% |
| Mailbox | Unknown / Other | 49 | 7.5% |
| Mailbox | Generic / unmatched (mx*.*) | 39 | 6.0% |
| ESP | Unisender (RU) | 165 | 25.4% |
| ESP | SendPulse | 70 | 10.8% |
| ESP | Mailgun | 68 | 10.5% |
| ESP | Mindbox | 52 | 8.0% |
Regional infrastructure and authentication records
Sendsay is typically detected in email authentication records through SPF include mechanisms, where senders configure include:sendsay.com to authorise the platform's mail servers. Because Sendsay's customer base is concentrated in the Russian-speaking market, its presence in a domain's SPF record is a strong signal of regional sending patterns and can influence how mailbox providers in different regions assess domain reputation and mail routing.
See the full Sendsay data page (KPI cards, trend, sample domains) →
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Frequently asked questions
What is Sendsay and why does it appear in SPF records?
Sendsay is a Russian email marketing platform that delivers mail on behalf of its customers. It appears in SPF records when a sender authorises Sendsay's infrastructure to send mail for their domain; this is normal authentication practice and is not itself a deliverability risk, though regional familiarity with the provider can affect how different mailbox providers handle the mail.
How many domains use Sendsay?
650 domains in the Tranco top-1M use Sendsay as their email service provider (ESP) as of September 12, 2026 (0.10% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is Sendsay common enough to affect email deliverability testing?
Sendsay accounts for 0.10% of SPF-publishing domains in the top 1M. Whether you should seed a test mailbox there depends on how much of your audience it represents — the co-usage table above shows the services it appears alongside most.
Which countries or TLDs use Sendsay most?
Sendsay's largest TLD is .ru (73.8% of its domains); it appears across 54 TLDs in total.