Matrix Synapse

Version: 1.138.0
Required minimum memory: 512MB
Last updated 10 Sep 2025
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Recent Changes

  • Update synapse to 1.138.0

  • Full Changelog

  • Support for the stable endpoint and scopes of MSC3861 & co. (#18549)

  • Improve database performance of MSC4293 - Redact on Kick/Ban. (#18851)

  • Do not throw an error when fetching a rejected delayed state event on startup. (#18858)

  • Fix worker documentation incorrectly indicating all room Admin API requests were capable of being handled by workers. (#18853)

  • Instrument _ByteProducer with tracing to measure potential dead time while writing bytes to the request. (#18804)

  • Switch to OpenTracing's ContextVarsScopeManager instead of our own custom LogContextScopeManager. (#18849)

  • Trace how much work is being done while "recursively fetching redactions". (#18854)

  • Link upstream Twisted bug tracking the problem that explains why we have to use a Producer to write bytes to the request. (#18855)

  • Introduce EventPersistencePair type. (#18857)

This package only provides the Matrix backend. A variety of clients are available here. Riot is a popular web frontend for Matrix and is available as a separate app.

About

Matrix is an ambitious new ecosystem for open federated Instant Messaging and VoIP.

Matrix specifies a set of pragmatic RESTful HTTP JSON APIs as an open standard, which handle:

  • Creating and managing fully distributed chat rooms with no single points of control or failure
  • Eventually-consistent cryptographically secure synchronisation of room state across a global open network of federated servers and services
  • Sending and receiving extensible messages in a room with (optional) end-to-end encryption[1]
  • Inviting, joining, leaving, kicking, banning room members
  • Managing user accounts (registration, login, logout)
  • Using 3rd Party IDs (3PIDs) such as email addresses, phone numbers, Facebook accounts to authenticate, identify and discover users on Matrix.
  • Placing 1:1 VoIP and Video calls

What is Synapse?

Synapse is a reference "homeserver" implementation of Matrix from the core development team at matrix.org, written in Python/Twisted.

Install Matrix Synapse in a few minutes on your server with Cloudron. To install Cloudron first, follow our setup steps.
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