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Dendrite

Second-generation Matrix homeserver written in Go

Matrix & XMPP Archived ★ 5.6k stars Medium setup Apache-2.0

This project is archived. Upstream development has stopped, so expect no new features or security fixes. Consider an actively maintained matrix & xmpp alternative.

Dendrite is a lightweight, efficient Matrix homeserver written in Go by the Matrix.org team. It is designed to be a more resource-efficient alternative to Synapse while remaining fully compatible with the Matrix protocol.

Official siteSource code

Key features

  • Lower memory footprint than Synapse
  • Federated Matrix protocol
  • End-to-end encryption support
  • Polylith and monolith deployment modes

Pros & cons

Strengths

  • Much lighter than Synapse
  • Active development by Matrix.org

Trade-offs

  • Some Synapse features still missing
  • Less battle-tested at large scale

Is Dendrite secure?

3 known vulnerabilities affect Dendrite's latest release (v0.13.8) according to OSV.dev; the most severe is rated high.

Affecting v0.13.8

AdvisorySeveritySummary
CVE-2026-63095HighDendrite 0.13.8 Improper Authorization via POST account/3pid/delete Endpoint
CVE-2026-63096MediumDendrite 0.13.8 SSRF via Unauthenticated Legacy Media Download Endpoint
CVE-2026-63097MediumDendrite 0.13.8 syncapi /context Endpoint Post-Leave State Exposure
  • Most recent fixed advisory CVE-2022-39200, published 2022-09-12 (1493 days ago), fixed in 0.9.8

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

Dendrite replaces

Self-hosted Slack alternativesSelf-hosted Discord alternatives

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