SHSelfHostIndex
SP

Spectrum 2

Transport and gateway framework for messaging networks

Chat & Communication ★ 421 stars Hard setup GPL-3.0

Spectrum 2 is an open-source transport framework that bridges XMPP and other messaging networks such as IRC, Slack, and Telegram. It lets users access multiple chat networks through a single client.

Official siteSource code

Key features

  • Bridges XMPP to other networks
  • IRC, Slack, and Telegram support
  • Pluggable backends
  • Web registration interface

Strengths

  • Released under the GPL-3.0 license
  • First-class Docker support for quick deployment
  • Written in C++
  • Tiny footprint — runs in 256 MB RAM

Is Spectrum 2 secure?

OSV.dev has no published security advisories for Spectrum 2's repository. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

Source: OSV.dev, checked 2026-10-14. How this is measured.

Spectrum 2 replaces

Self-hosted Bitlbee alternatives

Health badge

Maintain Spectrum 2? Add its health score to your README. The badge links back to this page.

SelfHostIndex: 60 · good

Markdown
[![SelfHostIndex health score for Spectrum 2](https://selfhostindex.com/badge/spectrum2.svg)](https://selfhostindex.com/app/spectrum2/)
HTML
<a href="https://selfhostindex.com/app/spectrum2/"><img src="https://selfhostindex.com/badge/spectrum2.svg" alt="SelfHostIndex health score for Spectrum 2"></a>
reStructuredText
.. image:: https://selfhostindex.com/badge/spectrum2.svg
   :alt: SelfHostIndex health score for Spectrum 2
   :target: https://selfhostindex.com/app/spectrum2/

The score is recomputed on every nightly rebuild from public repository data — see how it is calculated.

Similar chat & communication apps