Overview

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Welcome to LaunchDarkly docs

Learn how to use LaunchDarkly to release faster, break nothing, and build products customers love.

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Guarded rollouts

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Experimentation

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Product analytics

Start here

Build an application guarded by feature flags and learn how LaunchDarkly supports every step of the development lifecycle

Learn how to incorporate the LaunchDarkly SDKs into your application

Best practices to help everyone succeed with LaunchDarkly

Try the LaunchDarkly sandbox

You can also use the LaunchDarkly demo sandbox

What’s new

Date	Change summary	Affected topics
November 10, 2025	Publishes a topic about different flag types.	Flag types
November 10, 2025	Publishes a topic about progressive rollout health checks.	Progressive rollout health checks
November 7, 2025	Publishes a topic about online evaluations.	Online evaluations in AI Configs
November 6, 2025	Publishes a topic on investigating errors in guarded releases.	Guarded rollout errors

See all updates

Explore our SDKs

Use client-side, server-side, or edge SDKs to evaluate flags. Use AI SDKs to customize AI Configs.

Client-side and mobile SDKs

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Server-side SDKs

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PHP

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Ruby

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AI SDKs

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Python

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Edge SDKs

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Fastly

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OpenFeature providers

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Java

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Observability SDKs

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Android

iOS

Go

JavaScript

Node.js

Python

React Web

React Native

Vue

Additional resources

Learn how to use LaunchDarkly with these other useful resources.

LaunchDarkly community

Join other LaunchDarkly users on Discord.

LaunchDarkly YouTube

Watch videos covering integration demos, SDK overviews, a user interface (Ul) tutorial, and more.

LaunchDarkly Academy

Learn more about LaunchDarkly with recommended courses, live or self- guided training, webinars, and other activities.

LaunchDarkly knowledge base

Find frequently asked questions and ways to contact LaunchDarkly Support.