🦔 PostHog is the leading platform for building self-driving products. Our developer tools – AI observability, analytics, session replay, flags, experiments, error tracking, logs, and more – capture all the context agents need to diagnose problems, uncover opportunities, and ship fixes. Steer it all from Slack, web, desktop, or the MCP.

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• Updated Nov 12, 2026
• Python

Open-source feature management platform

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• Updated Nov 12, 2026
• TypeScript

Session replay, cobrowsing and product analytics you can self-host. Best for reproducing issues and iterating on your product.

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• Updated Nov 12, 2026
• TypeScript

Open Source Feature Flags, Experimentation, and Product Analytics

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• Updated Nov 12, 2026
• TypeScript

Production-grade Turborepo template for Next.js apps.

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• Updated May 28, 2026
• TypeScript

Flagsmith is an open-source feature flag platform with remote config, experimentation, and self-hosted or cloud deployment options.

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• Updated Nov 12, 2026
• Python

Countly is a privacy-first, AI-powered analytics and engagement platform for understanding and optimizing customer journeys across digital applications, from desktop and mobile to IoT and connected environments.

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• Updated Nov 12, 2026
• JavaScript

Enterprise-ready, Git native feature management solution

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• Updated Nov 12, 2026
• Go

🐬 Beautiful, performant feature flags for Ruby.

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• Updated Nov 11, 2026
• Ruby

Feature flippers.

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• Updated Oct 29, 2026
• Ruby

Flagr is a feature flagging, A/B testing and dynamic configuration microservice

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• Updated Nov 6, 2026
• Go

A tool for refactoring code related to feature flag APIs

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• Updated Oct 20, 2026
• Rust

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

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• Updated Nov 12, 2026
• Go

Enterprise-grade feature flag platform that you can self-host. Get started - free.

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• Updated Nov 12, 2026
• C#

FeatureProbe is an open source feature management service. 开源的高效可视化『特性』管理平台，提供特性开关、灰度发布、AB实验全功能。

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• Updated Jun 1, 2026
• TypeScript

OpenFeature specification

feature-flags specification openfeature

• Updated Nov 11, 2026
• Gherkin

A feature flipper for Django

feature-flags

• Updated Jun 7, 2026
• Python

Feature Flags/Toggles for Elixir

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• Updated Sep 21, 2025
• Elixir

⛳️ Feature Flags for Next.js

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• Updated Dec 12, 2025
• TypeScript

Feature Flags for the Java platform

java feature-flags feature-toggles

• Updated Nov 6, 2026
• Java