FeatBit
Feature flag service with a web portal and SDKs for releasing features step by step.
- Replaces
-
Paid feature flag services, such as LaunchDarkly.
All open-source alternatives to LaunchDarkly
- Difficulty
-
Difficulty: Medium
4 services (1 database or broker: postgres), 2 volume mounts, 1 env value to set, no elevated host access. Heuristic score 5 of 11: medium. A source checkout is needed, so the rating is at least medium.
- Stack
C# (language), PostgreSQL (database)
- Deployment
docker_compose
- Requirements
Not stated.
- License
-
MIT(OSI-approved open source) - Business model
-
Unknown
The README at the pinned commit does not state a business model, so it stays unknown.
Source: github.com/featbit/featbit/blob/1483cb9/README.md, read on .
- Repository
GitHub stats
- Stars
- 1,946
- Forks
- 151
- Open issues and pull requests
- 46
- Last push
- 2026-10-22
- Latest release
- 6.0.1
- Released
- 2026-10-14
From the GitHub API on . These numbers are a snapshot, not live. GitHub detected the license as MIT.
Compose file
name: featbit
services:
ui:
image: featbit/featbit-ui:${FEATBIT_VERSION:?FEATBIT_VERSION is required}
environment:
- API_URL=http://localhost:5000
- DEMO_URL=https://featbit-samples.vercel.app
- EVALUATION_URL=http://localhost:5100
- BASE_HREF=/
depends_on:
- api-server
ports:
- "8081:80"
networks:
- featbit-network
api-server:
image: featbit/featbit-api-server:${FEATBIT_VERSION:?FEATBIT_VERSION is required}
environment:
- DbProvider=Postgres
- MqProvider=Postgres
- CacheProvider=None
- Postgres__ConnectionString=Host=postgresql;Port=5432;Username=postgres;Password=please_change_me;Database=featbit
- Jwt__Algorithm=HS256
- Jwt__Key=please_change_me_to_a_secure_secret_key
depends_on:
- postgresql
ports:
- "5000:5000"
networks:
- featbit-network
evaluation-server:
image: featbit/featbit-evaluation-server:${FEATBIT_VERSION:?FEATBIT_VERSION is required}
environment:
- DbProvider=Postgres
- MqProvider=Postgres
- CacheProvider=None
- Postgres__ConnectionString=Host=postgresql;Port=5432;Username=postgres;Password=please_change_me;Database=featbit
depends_on:
- postgresql
ports:
- "5100:5100"
networks:
- featbit-network
postgresql:
image: postgres:15.10
container_name: postgresql
restart: on-failure
ports:
- "5432:5432"
environment:
POSTGRES_USER: postgres
POSTGRES_PASSWORD: please_change_me
volumes:
- ./infra/postgresql/docker-entrypoint-initdb.d/:/docker-entrypoint-initdb.d/
- postgres:/var/lib/postgresql/data
networks:
- featbit-network
networks:
featbit-network:
name: featbit-network
driver: bridge
ipam:
config:
- subnet: 172.10.0.0/16
volumes:
postgres:
From the app's own repository: github.com/featbit/featbit/blob/1483cb9/docker-compose.yml.
Compose file from featbit/featbit, used inside a checkout of that repository (documented setup B).
Install
- Docker with the Compose plugin and git (github.com/featbit/featbit/blob/1483cb9/README.md)
A host with Docker, the Docker Compose plugin and git. This entry needs a checkout of the project repository.
- Get the source at commit 1483cb9 (github.com/featbit/featbit/blob/1483cb9/README.md)
git init featbit cd featbit git remote add origin https://github.com/featbit/featbit.git git fetch --depth 1 origin 1483cb94c60af605a89a2d6cfeeaeee25f9a1241 git checkout FETCH_HEAD - The compose file in the checkout: docker-compose.yml (shown here for reading) (github.com/featbit/featbit/blob/1483cb9/docker-compose.yml)
Use the compose file shown above.
- What the compose file check ran with (github.com/featbit/featbit/blob/1483cb9/README.md)
The compose file check ran in a checkout of featbit/featbit at 1483cb94c60af605a89a2d6cfeeaeee25f9a1241 (a sparse checkout: only the top-level files). The README tells the reader to clone the repository, go into the featbit folder and run docker compose up -d.
- Start it (github.com/featbit/featbit/blob/1483cb9/README.md)
docker compose up -d - Open the app (github.com/featbit/featbit/blob/1483cb9/docker-compose.yml)
Open http://localhost:8081. The compose file publishes host port 8081 for the ui service. The README names this address for the portal.
Compose file check: config_ok on 2026-10-22.
Gotchas and maintenance
Gotchas
- The compose file has placeholder values. Placeholder values: Postgres__ConnectionString is "Host=postgresql;Port=5432;Username=postgres;Password=please_change_me;Database=featbit" (api-server), Jwt__Key is "please_change_me_to_a_secure_secret_key" (api-server), Postgres__ConnectionString is "Host=postgresql;Port=5432;Username=postgres;Password=please_change_me;Database=featbit" (evaluation-server), POSTGRES_PASSWORD is "please_change_me" (postgresql). (github.com/featbit/featbit/blob/1483cb9/docker-compose.yml, checked 2026-10-22)
- The compose file publishes host ports. Host ports: 8081 (ui), 5000 (api-server), 5100 (evaluation-server), 5432 (postgresql). A port without a host address listens on all host network interfaces. (github.com/featbit/featbit/blob/1483cb9/docker-compose.yml, checked 2026-10-22)
- The compose file mounts host folders. Host paths mounted into containers: ./infra/postgresql/docker-entrypoint-initdb.d/ at /docker-entrypoint-initdb.d/ (postgresql). (github.com/featbit/featbit/blob/1483cb9/docker-compose.yml, checked 2026-10-22)
Signals
- Open issues and pull requests: 46
- Last push: 2026-10-22 (0 days before this page was built)
- Latest release: 6.0.1 on 2026-10-14 (8 days before this page was built)