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🚀 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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[**Custom Domains** \
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Reduce the impact of adblockers by being able to CNAME client side endpoints to your domain to reduce adblock risk.\
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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?+