Best Open-Source Feature Flag Tools on GitHub (2026)

Q: What is the best open-source feature flag tools on GitHub?

Based on the RepoRadar scoring engine, Flagsmith/flagsmith is currently the top-ranked open-source feature flag tools with 6.4k stars and a score of 83/100.

Q: When was this open-source feature flag tools list last updated?

This list was last updated on 2026-06-19. Data is sourced directly from GitHub's public API.

This list contains the top 8 open-source feature flag tools on GitHub, ranked by the RepoRadar scoring engine across five quality dimensions. The top-ranked repo is Flagsmith/flagsmith with 6.4k stars. Projects span written in Python, TypeScript, Go, Shell. Data last updated 2026-06-19.

Updated 2026-06-19 · 8 repos · Data: GitHub public API

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Flagsmith is an open source feature flagging and remote config service. Self-host or use our hosted version at https://app.flagsmith.com.

★6.4k ⑂ 532 ⚠ 644 Python updated 12 hours ago

cdcicontinuous-integrationdocker

Open Source Feature Flags, Experimentation, and Product Analytics

★7.9k ⑂ 768 ⚠ 757 TypeScript updated 11 hours ago

ab-testingabtestabtestinganalytics

GO Feature Flag is a simple, complete and lightweight self-hosted cloud native feature flag solution 100% Open Source. 🎛️

★2k ⑂ 206 ⚠ 23 Go updated 18 hours ago

beginner-friendlycontinuous-deliverycontinuous-deploymentcontinuous-testing

All Results

A list of practical projects that anyone can solve in any programming language (See solutions). These projects are divided into multiple categories, and each category has its own …

★236 ⑂ 48 ⚠ 4 updated 10 months ago

SwitchFeat is an open source and self-hosted feature flags and A/B testing framework written in Nodejs, Typescript and React.

★205 ⑂ 15 ⚠ 18 TypeScript updated 2 years ago

ab-testingabtestingcontinuous-deliverydocker

# # Automatically generated file; DO NOT EDIT. # OpenWrt Configuration # CONFIG_MODULES=y CONFIG_HAVE_DOT_CONFIG=y # CONFIG_TARGET_sunxi is not set # CONFIG_TARGET_apm821xx is not…

★341 ⑂ 98 ⚠ 40 Shell updated 2 years ago

NOTICE This repository contains the public FTC SDK for the SKYSTONE (2019-2020) competition season. If you are looking for the current season's FTC SDK software, please visit the …

★286 ⑂ 87 ⚠ 22 Java updated 2 years ago

Skip to content github / docs Code Issues 80 Pull requests 35 Discussions Actions Projects 2 Security Insights Merge branch 'main' into 1862-Add-Travis-CI-migration-table 1862-Ad…

★238 ⑂ 0 ⚠ 30 updated 5 years ago

Frequently Asked Questions

What is the best open-source feature flag tools on GitHub?

Based on the RepoRadar scoring engine, Flagsmith/flagsmith is currently the top-ranked option with 6.4k stars and a score of 83/100.

How are open-source feature flag tools repositories ranked?

Repositories are ranked by the RepoRadar score — a composite of five dimensions: Popularity (35%), Freshness (25%), Maintenance (20%), Community (10%), and Completeness (10%). Scores range from 0–100.

When was this list last updated?

This list was last updated on 2026-06-19. Data is sourced directly from GitHub's public API. No cached or fabricated repositories are used.

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