Unleash

Description

Unleash is an open-source feature management platform, and a self-hosted alternative to LaunchDarkly. Feature flags are controlled by composable activation strategies — percentage rollouts, user or segment targeting, variants for A/B testing — and evaluated inside the application by SDKs, so no user data needs to leave your infrastructure. Environments, change requests, and audit logging support team workflows.

Features

• Activation strategies: Gradual rollout, targeting by user/segment, host/IP, and custom context.
• Local evaluation: SDKs evaluate flags in-process for speed and privacy; no per-request calls.
• A/B testing: Flag variants with weighting, plus impression events for experimentation.
• Environments & approvals: Per-environment configs with change-request review workflows.
• Governance: Full audit log, RBAC, SSO/SAML, and API tokens.
• SDK coverage: 15+ official server and client SDKs, plus Edge and Proxy for frontend apps.

Technology Stack

• TypeScript / Node.js API server
• React admin UI
• PostgreSQL as the only datastore
• Docker images and a Helm chart for deployment

Requirements

• Docker and Docker Compose (or Kubernetes)
• PostgreSQL 13+ database
• ~1 GB RAM for the API server