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MongooseIM

Scalable, robust XMPP messaging platform

Matrix & XMPP ★ 1.8k stars Hard setup GPL-2.0

MongooseIM is an enterprise-grade XMPP server written in Erlang, designed for high scalability and reliability. It supports clustering, REST APIs, and modern messaging extensions.

Official siteSource code

Key features

  • Built for massive scale
  • Clustering and high availability
  • GraphQL and REST admin APIs
  • Modern XEP support

Pros & cons

Strengths

  • Released under the GPL-2.0 license
  • First-class Docker support for quick deployment
  • Active community (1.8k GitHub stars)
  • Written in Erlang

Trade-offs

  • Complex deployment
  • Requires Erlang knowledge to extend

Is MongooseIM secure?

OSV.dev has no published security advisories for MongooseIM'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.

MongooseIM replaces

Self-hosted Slack alternativesSelf-hosted WhatsApp alternatives

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SelfHostIndex: 85 · excellent

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