Flags for modern software delivery

LaunchDarkly feature flags deliver real-time control, context-aware targeting, and product experimentation.

Cached locally

Once initialized, LaunchDarkly’s SDKs cache all the information they need to process flags, meaning your server can process millions of flag changes or your client-side application can render without suffering latency issues.

Consistent experience

Feature flags let you run canary tests, progressively deliver features, migrate to microservices, and more. These activities cut across teams within your company. Using LaunchDarkly feature flags provides all of them with a single and consistent experience.

SDK-powered

LaunchDarkly’s SDKs make integrating feature flags easy while also providing tons of bonus features like caching, streaming, and more. We support every major programming language across server, client, and mobile applications.

Real-time updates

No need to wait for a redeploy. Our streaming architecture ensures that your applications receive flag changes instantly, with flag updates processing on all connected clients within 200 milliseconds or less.

Do more with feature flags than you ever thought possible.

Beyond the boolean

Handle everything from the basic (but powerful) true-false scenarios to more complex use cases requiring multivariate flags such as strings, numbers, or JSON objects.

A/B testing and experimentation

Knowing a feature works isn’t the same as knowing whether it’s the right feature. A/B testing and experimentation with feature flags allows you to know both, just using a single tool.

Test in production

There’s no better way to ensure the success of a release in production than to test changes in production. Feature flags enable you to do that without impacting your users.

Kill switches

Use feature flags to mitigate the impact of incidents by immediately disabling problematic features, without the delay or negative impact of rollbacks, code changes, or redeploys.

Manage entitlements

Combining feature flags with powerful targeting capabilities makes them the perfect tool for managing entitlements, including anything from beta feature access to full-blown SaaS tenant entitlements.

Release management

LaunchDarkly feature flags give you the tools to manage releases on your terms whether through percentage-based rollouts, targeted audience rollouts, canary releases, or more. ## Effortlessly find, contextualize,
and arrange all your feature flags

Compare and copy

Compare feature flag configuration settings, including targets and variations, between flags set up in two different environments. For example, compare and clone rules from a staging environment into a production environment, without potentially costly manual errors.

Live Events

Live Events shows you a real-time stream of events arriving in LaunchDarkly from your app. Quickly verify that your flags are set up correctly. Live Events will help you collect more data and decide what to do next or even identify flags that are no longer in use.

Audit logs

The audit log in LaunchDarkly keeps a record of every change made to every flag in your codebase, making it easier to maintain regulatory compliance and retain critical contextual information.

Flag defaults

Create flag configurations that embody best practice and then reuse those flag defaults across multiple projects. Speed up flag creation, remove uncertainty, and reduce risk.