Hornetsecurity email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 16, 2026), Hornetsecurity is the email service provider (ESP) for 1,742 domains — 0.27% of 634,905 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 1,742 domains in the Tranco top-1M use Hornetsecurity (0.27% of SPF-publishing domains).
- Snapshot date: 2026-09-16 — recomputed every day.
- Strongest TLD: .de (39.6% of its domains).
- Region skew: Germany.
- Most co-used service: Hornetsecurity.
- Directory category: email security gateway.
Why Hornetsecurity appears in this category
German cloud email security (Vade group).
We classify it as a email security gateway 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.
Hornetsecurity is an email service provider serving smaller and mid-market organisations, predominantly in German-speaking regions. Its infrastructure is visible in the SPF records of domains using its platform, where it is listed as an authorised sender of mail.
Hornetsecurity's customer concentration sits in the long tail of smaller organisations rather than the largest global brands, with particularly strong presence in Germany and neighbouring markets. For deliverability teams and email administrators, Hornetsecurity is a regular fixture in the DACH region's email infrastructure, and understanding its role helps clarify authentication patterns and routing behaviour in those geographies.
Where Hornetsecurity sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 3 | 0.2% |
| Top 10,000 | 8 | 0.5% |
| Top 100,000 | 165 | 9.5% |
| Top 1,000,000 | 1,552 | 89.1% |
| Unranked | 14 | 0.8% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .de | 690 | 39.6% | |
| .com | 464 | 26.6% | |
| .fr | 136 | 7.8% | |
| .at | 46 | 2.6% | |
| .net | 41 | 2.4% | |
| .ch | 38 | 2.2% | |
| .co.uk | 38 | 2.2% | |
| .org | 36 | 2.1% | |
| .es | 30 | 1.7% | |
| .eu | 21 | 1.2% |
What Hornetsecurity users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 1,742 domains.
| Type | Service | Domains | Share of Hornetsecurity users |
|---|---|---|---|
| Mailbox | Hornetsecurity | 1,193 | 68.5% |
| Mailbox | Microsoft 365 | 179 | 10.3% |
| Mailbox | Hornetsecurity (AntispamEurope) | 142 | 8.2% |
| Mailbox | Unknown / Other | 71 | 4.1% |
| Mailbox | Google Workspace | 33 | 1.9% |
| Mailbox | Self-Hosted | 24 | 1.4% |
| ESP | Mailjet (Sinch) | 184 | 10.6% |
| ESP | Amazon SES | 147 | 8.4% |
| ESP | Brevo (ex-Sendinblue) | 116 | 6.7% |
| ESP | Constant Contact | 110 | 6.3% |
SPF authentication and regional infrastructure patterns
Hornetsecurity authorises its mail servers via SPF records published by customer domains, making it visible to anyone inspecting DNS configuration in the DACH region. The concentration of this SPF footprint in German-speaking markets reflects Hornetsecurity's customer base distribution. For organisations troubleshooting delivery or analysing infrastructure in those regions, recognising Hornetsecurity's infrastructure helps explain authentication signatures and regional routing behaviour.
See the full Hornetsecurity data page (KPI cards, trend, sample domains) →
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Frequently asked questions
What is Hornetsecurity and why does it appear in email infrastructure?
Hornetsecurity is an email service provider primarily serving smaller organisations in German-speaking markets; it appears in infrastructure via SPF records as an authorised sender, and is a common fixture in the DACH region's email ecosystem.
How many domains use Hornetsecurity?
1,742 domains in the Tranco top-1M use Hornetsecurity as their email service provider (ESP) as of September 16, 2026 (0.27% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is Hornetsecurity common enough to affect email deliverability testing?
Hornetsecurity accounts for 0.27% 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 Hornetsecurity most?
Hornetsecurity's largest TLD is .de (39.6% of its domains); it appears across 87 TLDs in total.