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Sliding Sync Proxy

Standalone sync proxy enabling fast Matrix clients

Matrix & XMPP Archived ★ 280 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.

The Sliding Sync Proxy is a standalone server that implements the MSC3575 sliding sync protocol in front of a Matrix homeserver. It enables fast, modern clients like Element X before native homeserver support.

Official siteSource code

Key features

  • Implements sliding sync protocol
  • Enables fast Element X clients
  • Sits in front of any homeserver
  • Postgres-backed state

Pros & cons

Strengths

  • Released under the Apache-2.0 license
  • First-class Docker support for quick deployment
  • Written in Go
  • Tiny footprint — runs in 256 MB RAM

Trade-offs

  • Being superseded by native support
  • Extra component to run

Is Sliding Sync Proxy secure?

OSV.dev has no published security advisories for Sliding Sync Proxy'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.

Health badge

Maintain Sliding Sync Proxy? Add its health score to your README. The badge links back to this page.

SelfHostIndex: 15 · archived

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   :alt: SelfHostIndex health score for Sliding Sync Proxy
   :target: https://selfhostindex.com/app/communication-matrix-sliding-sync/

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

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