LaunchDarkly

LaunchDarkly is the leading feature management platform, enabling teams to wrap features in flags, control rollouts with targeting rules, and run experiments — all without redeploying code. It's the bridge between engineering deployment and product experimentation.

Key Features

Feature flags with granular targeting rules. Percentage-based rollouts and canary releases. Built-in experimentation for measuring flag impact. Instant kill switches for incident response. Multi-environment support. Extensive SDK coverage (25+ languages). Audit logging and approval workflows.

Best For

Engineering teams that want to decouple deployment from release. Organizations practicing progressive delivery. Teams that need instant rollback capabilities for risk management. Companies that want developer-friendly feature flags with enterprise controls.

Limitations

Primarily a feature management tool — experimentation capabilities are less deep than Optimizely or Statsig. Pricing is per-seat plus MAU-based, which can be expensive. Over-reliance on flags can create technical debt if not managed.

Used by

IBM · Atlassian · Square · Honeycomb · CircleCI · Hulu · TripAdvisor · GoDaddy

Use cases

• Rolling out new features gradually to percentages of users
• Creating instant kill switches for risky deployments
• Targeting features to specific user segments or accounts
• Running simple A/B tests tied to feature flag variations

Alternatives

• Optimizely — Enterprise experimentation platform for A/B testing, multivariate testing, and personalization across web, mobile, and server-side. ($50,000/year)
• Statsig — Modern experimentation and feature gate platform with built-in product analytics, designed for high-velocity product teams. (Free)

Visit LaunchDarkly →