Dev Toolsdocker-ready1-click-deploypermissive-license
Unleash: the best Open Source alternative to LaunchDarkly in 2026
Unleash is an open source feature flag platform with user segmentation, gradual rollouts and SDKs for every popular language, an alternative to LaunchDarkly.
Technical profile
- License
- Apache-2.0
- Category
- Dev Tools
- Replaces
- LaunchDarkly
- Tech stack
- Node.jsPostgreSQL
Preview
Public image provided by Unleash on its own website.
Key features
- Gradual rollouts and segmentation
- SDKs for 20+ languages
- Custom activation strategies
Unleash vs. LaunchDarkly
Pros
- No charge per flag or per evaluated user
Things to consider
- Flag analytics panel is more basic than LaunchDarkly's
Quick Docker installation guide
Copy this docker-compose.yml, adjust the example passwords and run docker compose up -d on your server. See the full step-by-step guide →
docker-compose.yml
version: "3.9"
services:
unleash:
image: unleashorg/unleash-server:latest
restart: unless-stopped
ports:
- "4242:4242"
environment:
- DATABASE_URL=postgres://unleash:unleash@unleash-db:5432/unleash
depends_on:
- unleash-db
unleash-db:
image: postgres:15-alpine
restart: unless-stopped
environment:
- POSTGRES_USER=unleash
- POSTGRES_PASSWORD=unleash
- POSTGRES_DB=unleash
volumes:
- unleash_pg_data:/var/lib/postgresql/data
volumes:
unleash_pg_data: