LaunchDarkly
The runtime control plane for feature management and experimentation
Founded
2014
Starting Price
$0
Category
Developer Tools
Last updated April 27, 2026
About LaunchDarkly
LaunchDarkly is a feature management platform that enables engineering teams to release software features safely with feature flags, progressive rollouts, and instant kill switches. It provides runtime control over deployed code, allowing teams to manage release risk, run experiments, and deliver targeted user experiences without redeployment.
Pros & Cons
Pros
- Industry-leading feature flag platform with proven scale (20 trillion flag evaluations daily)
- Intuitive interface that simplifies feature management and enables quick rollouts
- Extensive SDK support for 25+ languages and frameworks
- Strong experimentation capabilities for data-driven feature decisions
- Excellent customer support with high responsiveness
Key Features
Feature Flags
Create and manage feature flags to control feature rollouts with granular targeting rules
Progressive Rollouts
Gradually release features to increasing percentages of users with automated guardrails
Experimentation
Run A/B tests and multivariate experiments to measure the impact of feature changes
AI Configs
Runtime control of AI prompts and model configurations without code changes
Feature-Level Monitoring
Real-time observability into how features perform with automated anomaly detection
Instant Kill Switches
Immediately disable problematic features in production without deploying new code
User Targeting
Target specific user segments based on attributes, cohorts, or custom rules
Pricing
Developer
$0
- 1 project
- 3 environments
- Feature flags
- Experimentation basics
- Community support
Best For
Progressive Feature Rollouts
Gradually release new features to increasing user percentages while monitoring for issues, with instant rollback capability
A/B Testing & Experimentation
Run controlled experiments on feature variations to measure impact on key metrics before full release
Technology Migration
Safely migrate between systems or architectures by using flags to gradually shift traffic and instantly revert if needed
Targeted User Experiences
Deliver personalized experiences by controlling feature access based on user segments, permissions, or subscription tiers
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