Superposition is a context-based configuration management system designed to facilitate safe and flexible rollout of config changes

A simple but powerful Rails engine for storing preferences, feature flags, etc. With support for reading/writing values client-side as well!

A lightweight Express.js middleware to help you implement feature flags.

Helps implement feature flags in your PowerShell projects.

flag0ut is a powerful feature flag management tool designed for modern development teams. It provides a centralized dashboard to manage, monitor, and optimize feature rollouts with ease. With features like percentage-based rollouts, role-based targeting, and AI-powered insights, flag0ut empowers developers to ship features fearlessly.

Eliminate Feature Flag Debt and Configuration Drift. FlagWay treats flags as Infrastructure-as-Code. A Build Plugin ("The Reaper") enforces cleanup dates, and a Kubernetes Operator syncs YAML manifests to LaunchDarkly. The "Terraform for Application State."

https://soasap.com is a hosted feature flag service. Ultra-lightweight feature flags SDK for React Native and Expo with instant local evaluation. Features real-time SSE updates, resilient AsyncStorage-backed caching for seamless offline support and fast app launches, and intuitive Hooks/Providers designed for responsive mobile experiences.

https://soasap.com is a hosted feature flag service. Ultra-fast, lock-free feature flags SDK for Node.js and TypeScript with $O(1)$ in-memory evaluation. Features real-time SSE updates, a resilient persistent disk cache for instant cold starts, and a zero-dependency, non-blocking architecture built for high-throughput production environments.

Kill Switch is an enterprise feature flag control plane for managing release switches across projects and environments. It lets teams create one canonical flag per feature, control its development, staging, and production states independently, and expose project-scoped API access for runtime flag evaluation.

https://soasap.com is a hosted feature flag service. Ultra-lightweight, flicker-free feature flags SDK for Angular 17+ with reactive Signals and instant $O(1)$ local evaluation. Features real-time SSE updates, a resilient persistent browser cache for seamless offline support, and a non-blocking standalone architecture built for zero-overhead applic

https://soasap.com is a hosted feature flag service. Ultra-lightweight, flicker-free feature flags SDK for React and Next.js (App & Pages Router) with instant client-side evaluation. Features real-time SSE updates, persistent browser cache for offline support and fast cold starts, and intuitive Hooks/Providers for responsive UI rendering.

Feature Flags as a Service

https://soasap.com is a hosted feature flag service. Ultra-fast, lock-free feature flags SDK for .NET with zero-allocation O(1) reads. Features real-time SSE updates, a resilient persistent disk cache for instant cold starts, non-blocking startup, and memory cap protection. Built for low-latency local evaluation with zero external dependencies

🏁 Implementing a feature flag system

https://soasap.com is a hosted feature flag service. Ultra-fast feature flags SDK for Python with instant $O(1)$ synchronous reads and real-time SSE updates. Features a resilient persistent disk cache for instant cold starts and a lightweight, non-blocking background architecture built for high-throughput production environments.

https://soasap.com is a hosted feature flag service. Ultra-lightweight feature flags SDK for Kotlin and Android with O(1) local evaluation. Features real-time SSE updates, immutable snapshots, resilient persistent disk caching for fast cold starts, non-blocking startup, automatic reconnect, and graceful offline operation.