Mailgun vs Mailcow
A detailed comparison to help you choose between Mailgun and Mailcow.
Quick Verdict
3.7/5
Mailgun
0 reviews
4.1/5
Mailcow
0 reviews
Mailcow is rated higher (4.1 vs 3.7). Mailgun is a developer-focused email API service owned by Sinch. Inbound email parsing, email validation API, and detailed analytics. Popular for startups building email features into their apps. Mailcow is a free, open source email server suite running on Docker. Complete mail server with anti-spam, anti-virus, webmail, SOGo, and admin panel. Self-host on any VPS.
Mailgun Email API for developers — by Sinch | Mailcow Self-hosted email server with Docker | |
|---|---|---|
| Overview | ||
| Rating | 3.7 (0 reviews) | 4.1 (0 reviews)✓ |
| Pricing model | freemium | free |
| Starting price | Free tier available | Free |
| Best for | Developers and SaaS teams sending transactional email from applications who also need inbound email parsing, validation, and deliverability tooling | Sysadmins and small organisations who want self-hosted, sovereign email on their own server with full groupware, and who can operate a Docker-based mail stack |
| Specifications (entry plan) | ||
| CPU cores | — | 1 vCPU |
| RAM | — | 6 GB |
| Storage | — | 20 GB |
| Bandwidth | — | — |
| SLA uptime | 99.99% | — |
| Data-center count | — | — |
| €/vCPU/mo | — | €0.00 |
| €/GB RAM/mo | — | €0.00 |
| Features | ||
| IPv6 | ||
| DDoS protection | ||
| Automated backups | ||
| Snapshots | ||
| Managed option | ||
| Bare metal | ||
| GPU available | ||
| S3-compatible | ||
| Hourly billing | ||
| Free tier | ||
| Data-center locations | ||
| Regions | — | Not applicable — self-hosted; managed mailcow runs in Germany |
| Tags | ||
| Tags | free tierapi access | free tieropen sourceself hostable |
| Visit Mailgun → | Visit Mailcow → | |
Mailgun
Pros
- + Inbound email parsing on every plan, including Free — the strongest developer-side feature in this category
- + Published four-tier pricing with explicit overage rates ($15/$35/$90 per month tiers)
- + Credit-backed 99.99% availability SLA on API, SMTP, and outbound delivery
- + US or EU (Ireland) sending regions per account, with GDPR/HIPAA/SOC/ISO 27001 compliance paperwork
Cons
- - One day of log retention on Free and Basic — debugging old delivery issues is impossible without exporting logs
- - Chat and phone support only on the $90/month Scale tier; support quality under Sinch ownership draws community criticism
- - Dedicated IPs cost extra below high volumes (third-party listings quote ~$59/IP/month)
- - US operating entity under a Swedish parent — CLOUD Act exposure remains for privacy-sensitive EU buyers
Mailcow
Pros
- + Free GPLv3 suite with the full mail stack (groupware, ActiveSync, Rspamd, ClamAV) — no seats, no volume caps
- + Specific, credible hardware requirements and detailed ops documentation
- + Active monthly release train with prompt security patches (e.g. CVE-2026-33278 fix in May 2026, forced 2FA in March 2026)
- + Vendor-backed escape hatches: shared mailcow from EUR 8.90/mo and managed mailcow from EUR 54.90/mo in Germany
Cons
- - Needs real server management skills (Docker, DNS, PTR, firewall chains, updates)
- - 6 GiB RAM minimum rules out the cheapest VPS tiers
- - IP reputation and deliverability are entirely self-managed on the free tier
- - Community-only support with no SLA behind the open-source software
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