Best alternatives to LaunchDarkly in 2026

Normally, shipping a new feature to users means deploying new code — and if something goes wrong, the only fix is another deploy, which can take minutes engineers don't have during an outage. LaunchDarkly wraps new features in a switch that can be flipped on or off instantly for any group of users, so a bad release can be turned off in seconds instead of requiring an emergency code rollback. LaunchDarkly is a runtime control platform for feature flags, progressive rollouts, and experimentation, with automated rollbacks tied to error monitoring so a flag reverts itself if it starts causing problems. It has grown into a broader release and AI-control platform for 2026: an "AgentControl" capability lets teams turn AI agents on/off and evaluate their behavior online or offline, an LLM playground supports prompt management and A/B testing, and it runs A/B/n experiments with multi-armed bandits and holdouts. The Developer tier is free with unlimited seats, 10M logs/traces, 5,000 session replays and 5,000 AI runs/month; Foundation is usage-based at $10/service/month or $8.33 per 1,000 client-side MAU; Enterprise and Guardian tiers require custom pricing.