🚀 DevCycle is Now Part of Dynatrace! [Learn more](https://blog.devcycle.com/devcycle-is-now-part-of-dynatrace/)

Enterprise-Grade, Easy-To-Implement

# Open Source SDKs Built for OpenFeature

Our SDKs are well documented, open source, and built for the OpenFeature standard. Use DevCycle anywhere across your stack.

## Open Source SDKs Built for Open Standards

# OpenFeature-Native SDKs for Every Language

Community-backed, open-source SDKs with no vendor lock-in. Built transparently and compliant with the OpenFeature standard.

**JavaScript SDK**
Client-side JavaScript SDK with OpenFeature compliance](https://docs.devcycle.com/sdk/client-side-sdks/javascript/)

**React SDK**
React hooks and components for seamless feature flag integration](https://docs.devcycle.com/sdk/client-side-sdks/react/)

**Next.js SDK**
Server-side rendering and static generation support](https://docs.devcycle.com/sdk/client-side-sdks/nextjs/)

**Angular SDK**
TypeScript-first framework SDK for Angular applications](https://docs.devcycle.com/sdk/client-side-sdks/angular/)

**React Native SDK**
Cross-platform mobile development with React Native](https://docs.devcycle.com/sdk/client-side-sdks/react-native/)

**Android SDK**
Native Android development with Kotlin and Java support](https://docs.devcycle.com/sdk/client-side-sdks/android/)

**iOS SDK**
Native iOS development with Swift and Objective-C support](https://docs.devcycle.com/sdk/client-side-sdks/ios/)

**Flutter SDK**
Cross-platform mobile development with Dart and Flutter](https://docs.devcycle.com/sdk/client-side-sdks/flutter/)

**Roku SDK**
BrightScript SDK for Roku streaming applications](https://docs.devcycle.com/sdk/client-side-sdks/roku/)

**Node.js SDK**
Server-side JavaScript with enterprise-grade performance](https://docs.devcycle.com/sdk/server-side-sdks/node/)

**NestJS SDK**
Progressive Node.js framework for scalable server-side applications](https://docs.devcycle.com/sdk/server-side-sdks/nestjs/)

**Go SDK**
High-performance server-side SDK for Go applications](https://docs.devcycle.com/sdk/server-side-sdks/go/)

**Java SDK**
Enterprise Java applications with Spring Boot integration](https://docs.devcycle.com/sdk/server-side-sdks/java/)

**.NET SDK**
C# and .NET Core applications with ASP.NET support](https://docs.devcycle.com/sdk/server-side-sdks/dotnet/)

**Python SDK**
Django, Flask, and FastAPI framework integrations](https://docs.devcycle.com/sdk/server-side-sdks/python/)

**Ruby SDK**
Ruby on Rails and Sinatra application support](https://docs.devcycle.com/sdk/server-side-sdks/ruby/)

**PHP SDK**
Laravel, Symfony, and Vanilla PHP application support](https://docs.devcycle.com/sdk/server-side-sdks/php/)

## Comprehensive SDK Features To Power Your Releases

DevCycle's OpenFeature-native SDKs provide enterprise-grade capabilities across all programming languages

[**Realtime Updates**
Instantly push feature flag changes to all SDKs using server-sent events without app restarts.
LEARN MORE](https://docs.devcycle.com/sdk/features/#realtime-updates)

[**SDK Bootstrapping**
Eliminate initial load delays with pre-loaded configurations for instant flag evaluations.
LEARN MORE](https://docs.devcycle.com/sdk/server-side-sdks/node/node-bootstrapping/)

[**Local & Cloud Bucketing**
Choose between lightning-fast local evaluations or edge-based cloud bucketing for advanced features like EdgeDB.
LEARN MORE](https://docs.devcycle.com/sdk/features#local-and-cloud-bucketing)

[**Custom Event Tracking**
Track user interactions and business metrics for A/B testing and feature impact analysis.
LEARN MORE](https://docs.devcycle.com/sdk/features#tracking-custom-events)

[**Intelligent Caching**
Smart caching ensures your apps work even with poor connectivity.
LEARN MORE](https://docs.devcycle.com/sdk/features#caching-of-configurations)

[**Advanced User Targeting**
Target users with custom properties, private data, and dynamic user identification.
LEARN MORE](https://docs.devcycle.com/sdk/features#identifying-a-user-or-setting-properties)

[**Custom Domains**
Reduce the impact of adblockers by being able to CNAME client side endpoints to your domain to reduce adblock risk.
LEARN MORE](https://docs.devcycle.com/sdk/features#custom-domains)

## OpenFeature SDK FAQs

Everything you need to know about DevCycle's comprehensive OpenFeature SDK collection and how to implement feature flags with the OpenFeature standard.

What are OpenFeature SDKs?+

Which OpenFeature SDKs does DevCycle support?+

How do DevCycle's OpenFeature providers compare to other providers?+

Are DevCycle's OpenFeature SDKs open source?+

How do I migrate from proprietary feature flag SDKs to OpenFeature?+

What performance benefits do DevCycle's OpenFeature SDKs provide?+

Do OpenFeature SDKs support all DevCycle features?+

Can I use OpenFeature SDKs for mobile app development?+

How do OpenFeature hooks work with DevCycle SDKs?+

What is bootstrapping in OpenFeature SDKs?+

How do I implement OpenFeature SDKs in microservices?+

Do OpenFeature SDKs work with poor connectivity?+