#feature-toggles

DevCycle - Python Server SDK

LaunchDarkly Server-Side SDK for Erlang/Elixir

Server-Sent Events client for Ruby

Types and eval logic for LaunchDarkly Rust SDKs

Izanami is a centralized versatile feature flag solution, well suited for micro service architectures.

Unleash Toolbar for frictionless local development

Server Side Events client and server for Go

An OpenFeature provider for the LaunchDarkly Ruby server SDK.

Server-sent events (SSE) client implementation for Rust

LaunchDarkly Server-side AI SDK for Go

Redis integration for the LaunchDarkly SDK for Server-side Go (with Redigo client)

:zap: GrowthBook Proxy Server - Caching, Streaming, Security, and Scalability

Redis integration for the LaunchDarkly SDK for Server-side PHP using predis

DevCycle - .NET Server SDK

DevCycle - PHP Server SDK

An OpenFeature provider for the LaunchDarkly dotnet server SDK.

Local OpenFeature provider with JSON/YAML snapshot validation, environment overrides, and redacted audit logs.

ConfigCat SDK for Rust. ConfigCat is a hosted feature flag service: https://configcat.com. Manage feature toggles across frontend, backend, mobile, desktop apps. Alternative to LaunchDarkly. Management app + feature flag SDKs.

Production intelligence layer for feature flags at scale — blast radius gating, circuit-breaker auto-rollback, Merkle-linked audit log, incident correlation, and Knight Capital–style tombstoning. Go + Python + TypeScript polyglot monorepo.

Feature flags as a Convex component — variants, targeting, percentage rollouts, and per-subject overrides, evaluated on the backend and streamed live to clients.

Official Zenmanage feature flags SDK for PHP

Redux SDK client for Split Software

Official Zenmanage feature flags SDK for Laravel

ConfigCat SDK for Elixir. ConfigCat is a hosted feature flag service: https://configcat.com. Manage feature toggles across frontend, backend, mobile, desktop apps. Alternative to LaunchDarkly. Management app + feature flag SDKs.