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LaunchDarkly

Freemium
launchdarkly.com
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Feature management and experimentation platform allowing development teams to decouple software deployment from feature release.

About LaunchDarkly

LaunchDarkly is the pioneer in enterprise feature management, empowering engineering and product teams to safely control software delivery at scale. By wrapping code changes in dynamic feature flags, LaunchDarkly decouples code deployments from feature releases, enabling developers to push code to production continuously while toggling visibility for specific user cohorts on demand.

The platform incorporates automated experimentation, targeted rollouts, and instant kill switches that allow engineers to deactivate malfunctioning features in milliseconds without redeploying code. LaunchDarkly is reinforced by AI-driven release monitoring and contextual flags, allowing organizations to run canary rollouts, validate infrastructure migrations, and conduct controlled beta tests across millions of active users.

LaunchDarkly operates via global edge architectures that evaluate flag statuses in single-digit milliseconds, supported by SDKs for over 25 client-side and server-side programming languages. It provides a free starter plan for small teams alongside enterprise tiers with advanced governance, audit logs, and compliance integrations.

Key Features

Core capabilities and technical highlights of LaunchDarkly

Ultra-low latency flag evaluation engine operating across global edge networks with real-time streaming updates.
Targeted progressive rollouts enabling granular percentage-based and attribute-based audience segmentation.
Instant emergency kill switches capable of disabling broken features in production within milliseconds.
Comprehensive experimentation suite tracking conversion metrics, regression rates, and statistically significant results.

Popular Use Cases

How teams, developers, and creators get value from LaunchDarkly

1Roll out new software features progressively to 1% of users before safely scaling to the entire global audience.
2Disable a failing microservice or third-party integration instantaneously using a global kill switch during an outage.
3Conduct multivariate A/B testing on live user interfaces to measure conversion impact before full adoption.
4Grant early beta access to specific enterprise customer accounts based on custom targeting rules and attributes.

Frequently Asked Questions

Common questions and answers regarding LaunchDarkly

Does LaunchDarkly offer a free tier?
Yes, LaunchDarkly offers a free Starter plan for small teams with core feature flagging capabilities, with paid plans available for advanced experimentation and governance.
How fast do feature flag updates propagate?
LaunchDarkly uses streaming server-sent events to propagate flag changes to connected SDKs in under 200 milliseconds globally.
What happens if LaunchDarkly experiences downtime?
LaunchDarkly SDKs evaluate flags locally using cached rules and default fallback values, ensuring zero downtime for your applications.
Does LaunchDarkly support A/B testing?
Yes, LaunchDarkly Experimentation allows teams to test multiple feature variations and measure their direct statistical impact on business metrics.
Which programming languages are supported?
LaunchDarkly provides official SDKs for more than 25 environments, including JavaScript, React, Node.js, Python, Java, Go, iOS, Android, and .NET.

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Tool Specifications

Pricing Modelfreemium
Owner VerifiedNo
Listed DateOct 11, 2026