LaunchDarkly

LaunchDarkly is a feature management platform that lets engineering teams decouple deploying code from releasing features. Developers wrap changes in feature flags, then turn them on or off, target specific users or segments, and roll out gradually — all without redeploying. If something goes wrong, a flag can be flipped off instantly, turning risky releases into controlled, reversible ones and reducing the blast radius of any change. The platform spans the full release lifecycle. Percentage rollouts and targeting rules control who sees what; prerequisites and dependencies manage complex flag relationships; and Guarded Releases monitor metrics to automatically roll back a flag if it degrades performance. LaunchDarkly also includes experimentation (A/B/n testing tied to flags) and workflow controls, approvals, and audit logs for governance. SDKs for dozens of languages evaluate flags with low latency, and a streaming architecture keeps flag changes near-instant across clients and servers. LaunchDarkly serves software teams from startups to large enterprises that release frequently and need safety and control, with SSO, roles, and compliance for regulated buyers. Pricing centers on usage and platform tiers: a free Developer plan with unlimited seats and flags, a usage-priced Foundation plan (by service connections and client-side MAU), and custom Enterprise and Guardian tiers. It competes with Statsig, Optimizely, Split, and open-source options like Flagsmith and GrowthBook, differentiating on reliability, scale, and governance.