Haraka vs Postal
| Tagline | Fast, highly extensible event-driven SMTP server in Node.js | Self-hosted mail delivery platform, a SendGrid/Mailgun alternative |
| Category | Email & Newsletters | Email & Newsletters |
| Replaces | SendGrid | SendGrid |
| GitHub stars | 5.6k | 17k |
| Language | JavaScript | Ruby |
| License | MIT | MIT |
| Self-host difficulty | 4/5 Involved | 4/5 Involved |
| Deploy options | Docker Manual | Docker Docker Compose Manual |
| Managed hosting | ||
| Last updated | 8 days ago | 5 days ago |
| View repo | View repo |
Where each falls short
The honest trade-offs — what you give up with each, versus the proprietary tools they replace.
Haraka
- Low-level MTA — no web UI, dashboards, or campaign tooling
- Requires writing/configuring plugins for real-world setups
- No built-in analytics, tracking, or template management
- Deliverability and reputation management are entirely on you
Postal
- You are responsible for IP reputation, warmup, and deliverability
- Requires MariaDB, RabbitMQ, and DNS/DKIM configuration to run
- No marketing-campaign UI — it is a delivery engine, not a newsletter builder
- Less hand-holding than managed providers for spam/blocklist issues
Bottom line
Both are a similar lift to self-host; choose Postal for the larger community and ecosystem. Postal has seen more recent development. Open each guide below for deploy steps and the full feature gap.