# Sōzu

HTTP and TCP reverse proxy written in Rust that accepts configuration changes at runtime and upgrades without dropping connections.


Source: https://findsoftware.frbit.cloud/sozu/
Last reviewed: 2026-10-30
Listed since: 2026-10-30

## Record

### Links

- home: https://www.sozu.io
- repository: https://github.com/sozu-proxy/sozu
- docs: https://github.com/sozu-proxy/sozu/blob/main/doc/README.md

### Identity

- status: active
- maintainer: Clever Cloud SAS
- maintainerType: company
- parent: unknown
- firstRelease: 2017
- hqCountry: FR

### Kind

- category: web-server
- hosting: binary
- language: rust
- runtime: binary
- runtimeMin: unknown
- basedOn: unknown

### Content

- contentStore: not applicable
- databases: not applicable
- adminUi: not applicable
- headlessApi: not applicable
- templating: not applicable
- i18n: not applicable

### Rendering and deploy

- runsAs: always-on
- renderingModes: not applicable
- installMethod: prebuilt-binary-tarball

### License

- licenseModel: open-source
- license: AGPL-3.0, LGPL-3.0

### Releases

- currentMajor: 2
- latestReleaseDate: 2026-10-19

### Adoption

- githubStargazers: 3752
- packagistDownloads: not applicable
- npmWeeklyDownloads: not applicable
- contributors: 58
- pluginCount: unknown
- packagistMonthlyDownloads: unknown
- ecosystemsMonthlyDownloads: unknown
- httpArchiveSites: unknown
- wordpressActiveInstalls: unknown
- dependentRepos: unknown
- dependentPackages: unknown

### Sources

- name: https://www.sozu.io/ (read 2026-10-30)
- urls: https://api.github.com/repos/sozu-proxy/sozu (read 2026-10-30)
- urls: https://api.github.com/repos/sozu-proxy/sozu (read 2026-10-30)
- urls: https://github.com/sozu-proxy/sozu/blob/main/README.md (read 2026-10-30)
- maintainer: https://www.sozu.io/legal-notice/ (read 2026-10-30)
- maintainer: https://github.com/sozu-proxy/sozu/blob/main/README.md (read 2026-10-30)
- maintainerType: https://www.sozu.io/legal-notice/ (read 2026-10-30)
- hqCountry: https://www.sozu.io/legal-notice/ (read 2026-10-30)
- category: https://www.sozu.io/ (read 2026-10-30)
- category: https://www.sozu.io/ (read 2026-10-30)
- language: https://api.github.com/repos/sozu-proxy/sozu (read 2026-10-30)
- runtime: https://github.com/sozu-proxy/sozu/blob/main/README.md (read 2026-10-30)
- license: https://api.github.com/repos/sozu-proxy/sozu (read 2026-10-30)
- license: https://github.com/sozu-proxy/sozu/blob/main/README.md (read 2026-10-30)
- licenseModel: https://www.sozu.io/about (read 2026-10-30)
- currentMajor: https://github.com/sozu-proxy/sozu/releases/tag/2.3.3 (read 2026-10-30)
- latestReleaseDate: https://github.com/sozu-proxy/sozu/releases/tag/2.3.3 (read 2026-10-30)
- firstRelease: https://github.com/sozu-proxy/sozu/tree/0.1.0 (read 2026-10-30)
- githubStargazers: https://api.github.com/repos/sozu-proxy/sozu (read 2026-10-30)
- contributors: https://api.github.com/repos/sozu-proxy/sozu/contributors (read 2026-10-30)
- installMethod: https://github.com/sozu-proxy/sozu/blob/main/README.md (read 2026-10-30)
- installMethod: https://github.com/sozu-proxy/sozu/blob/main/README.md (read 2026-10-30)
- installMethod: https://github.com/sozu-proxy/sozu/blob/main/README.md (read 2026-10-30)
- runsAs: https://github.com/sozu-proxy/sozu/blob/main/README.md (read 2026-10-30)

## Notes

Sōzu is a reverse proxy written in Rust that routes HTTP and TCP traffic to backend servers. It accepts configuration changes at runtime without a reload, and it upgrades itself while still processing requests, so the proxy stays up during updates. The [repository](https://github.com/sozu-proxy/sozu) ships pre-built Linux binaries with each tagged release, a Docker image on Docker Hub, and a source build with cargo. Clever Cloud SAS, a company in Nantes, France, maintains the project.

## Worth knowing

The main program is licensed under AGPL-3.0 and the command library under LGPL-3.0. The project's about page says a business building on Sōzu should contribute back or agree a separate business arrangement with Clever Cloud.

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Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Attributes are recorded, never scored; absent means unknown.
Credit, in full: FindSoftware, CC BY 4.0