# proton-bridge

> Updated 2026-09-03 · type: tool · category: email-outbound · status: active · rev 1

~1500 stars; complements hydroxide; Official Proton Mail Bridge; exposes local IMAP/SMTP for standard clients. Auth via Proton login + keychain. Requires paid…

- Open source: yes (GPL-3.0)
- Self-hostable: yes
- Best for: Users who need to connect their Proton Mail account to third-party email clients via local IMAP/SMTP servers.
- Last verified: 2026-09-04

- **Canonical:** https://gtmstacker.com/registry/tool/proton-bridge/
- **Source:** [github · github.com/ProtonMail](https://github.com/ProtonMail/proton-bridge)
- **Tags:** email-outbound, email-providers-protocols
- **Repository:** https://github.com/ProtonMail/proton-bridge

## Is proton-bridge open source?

Yes — GPL-3.0-licensed.

## How much does proton-bridge cost?

It is open source — self-hosting is free; you pay only for your own infrastructure.

## Can I self-host proton-bridge?

Yes — it can be self-hosted.


---

~1500 stars; complements hydroxide; Official Proton Mail Bridge; exposes local IMAP/SMTP for standard clients. Auth via Proton login + keychain. Requires paid Proton plan. No ToS risk (sanctioned).