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Home / Migrations / LaunchDarkly → Unleash

LaunchDarkly → Unleash

medium

Unleash is the open-source LaunchDarkly. Free to self-host, same feature flag concepts, much cheaper at scale.

Estimated: 4-8h · 5 steps

Progress0%

Step 1: Deploy Unleash

Docker Compose or Unleash Cloud.

docker run -d --name unleash -p 4242:4242 unleashorg/unleash-server:latest

Step 2: Recreate flags

Manually recreate your LaunchDarkly feature flags in Unleash. Match flag keys exactly to minimize code changes.

Step 3: Install Unleash SDK

npm uninstall launchdarkly-node-client-sdk && npm install unleash-client

Step 4: Update flag evaluation

LaunchDarkly: client.variation('flag', context, false). Unleash: client.isEnabled('flag', context, false). Map user attributes to Unleash context.

Step 5: Test rollout

Verify gradual rollout, user targeting, and kill switches work correctly.

✓ All feature flags evaluate correctly, no regressions