Open Source · Self-Hosted · Zero Dependencies
Flagbase
Feature flag management for modern teams. Ship dark, control rollouts, target users — all without a backend.
Multi-Environment Flags
Manage flags independently across development, staging, and production. Each environment has its own state.
Targeting Strategies
Default on/off, gradual rollout by percentage, or exact user ID allowlists — all configurable per environment.
Drop-in SDK
One class, zero dependencies. Paste the snippet and start gating features in any JS project instantly.
Backed by Firebase Realtime DB · Shared public workspace