3 self-hosted Mailgun alternatives

Mailgun is a popular proprietary tool in the mail servers space. These open-source apps let you replace Mailgun with software you host and control yourself.

Best self-hosted Mailgun alternatives

Postal

Mail Servers

Complete mail delivery platform for outgoing email

Replaces SendGrid, Mailgun

★ 16.7k Hard setup MIT

Haraka

Mail Servers

High-performance, pluggable SMTP server in Node.js

Replaces SendGrid, Mailgun

★ 5.6k Medium setup MIT

Cuttlefish

Mail Servers

Transactional email server with click and open tracking

Replaces Mailgun, SendGrid

★ 1.6k Medium setup AGPL-3.0

Compare Mailgun alternatives

Switching from Mailgun

Moving off Mailgun means trading a managed subscription for a service you run yourself. The payoff is ownership: no per-seat pricing, no vendor lock-in, and full control of your data. Start with the option above that matches your setup-difficulty comfort level — every app links to a detailed specs page and head-to-head comparisons.