Mailcow vs Mailtrap
A detailed comparison to help you choose between Mailcow and Mailtrap.
Quick Verdict
4.1/5
Mailcow
0 reviews
3.6/5
Mailtrap
0 reviews
Mailcow is rated higher (4.1 vs 3.6). 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. Mailtrap provides a safe sandbox environment to test email functionality during development, plus a transactional email service for production. Designed for developers and QA teams who need reliable email testing without affecting real users.
Mailcow Self-hosted email server with Docker | Mailtrap Email testing and delivery platform for developers | |
|---|---|---|
| Overview | ||
| Rating | 4.1 (0 reviews)✓ | 3.6 (0 reviews) |
| Pricing model | free | freemium |
| Starting price | Free | Free tier available |
| Best for | 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 | Development and QA teams that need a safe sandbox to test transactional email before production, plus a compliance-conscious sending service for small-to-mid volume |
| Specifications (entry plan) | ||
| CPU cores | 1 vCPU | — |
| RAM | 6 GB | — |
| Storage | 20 GB | — |
| Bandwidth | — | — |
| SLA uptime | — | — |
| 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 tieropen sourceself hostable | free tierapi access |
| Visit Mailcow → | Visit Mailtrap → | |
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
Mailtrap
Pros
- + Best-executed email sandbox we have reviewed: header inspection, HTML client previews, spam scoring, bounce simulation, CI integration
- + Genuinely free-forever tiers on all three products (4,000 emails/mo sending, 50 test emails/mo sandbox), no credit card
- + GDPR, ISO 27001, and SOC 2 Type II compliance plus 2FA on every plan including Free
- + Inbound email parsing on every plan, and dedicated IP with auto warm-up included from Business ($85/mo)
Cons
- - Three separately priced products — sandbox testing and production sending are two bills, not one
- - No published uptime SLA or credit-backed availability commitment
- - Short log retention on low tiers (3 days Free, 5 days Basic)
- - Third-party reviews report abrupt compliance-review account suspensions; Email API annual billing requires contacting sales
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