README
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An open source, self-hosted feature flag solution
Documentation • Usecases • Features • Values • Examples • Integration • Community
Flipt is an open-source, self-hosted feature flag application that allows you to run experiments across services in your environment.
Flipt can be deployed within your existing infrastructure so that you don't have to worry about your information being sent to a third party or the latency required to communicate across the internet.
Usecases
Flipt supports use cases such as:
- Enabling trunk-based development workflows
- Testing new features internally during development before releasing them fully in production
- Ensuring overall system safety by guarding new releases with an emergency kill switch
- Gating certain features for different permission levels allowing you to control who sees what
- Enabling continuous configuration by changing values during runtime without additional deployments
Features
- Fast. Written in Go. Optimized for performance
- Stand alone, single binary that's easy to run and configure
- Ability to create advanced distribution rules to target segments of users
- Native GRPC client SDKs to integrate with your existing GRPC architecture
- Powerful REST API with native SDKs for easy integration
- Modern, mobile-friendly 📱 UI and debug console
- Dark mode 🌙
- Supports multiple databases: Postgres, MySQL, SQLite, CockroachDB
- Import and export to allow storing your data as code
- Cloud-ready ☁. Runs anywhere: bare metal, PaaS, K8s, with Docker or without
- Works with Prometheus and OpenTelemetry out of the box
- Filesystem, S3, and Git storage backends
- Audit logging to track changes to your data
Are we missing a feature that you'd like to see? Let us know!
Values
- 🔒 Security - HTTPS support. OIDC and Static Token authentication. No data leaves your servers and you don't have to open your systems to the outside world to communicate with Flipt. It all runs within your existing infrastructure.
- 🚀 Speed - Since Flipt is co-located with your existing services, you do not have to communicate across the internet which can add excessive latency and slow down your applications.
- ✅ Simplicity - Flipt is a single binary with no external dependencies by default.
- 👍 Compatibility - REST, GRPC, MySQL, Postgres, CockroachDB, SQLite, Redis... Flipt supports it all.
- 👀 Observability - Flipt integrates with Prometheus and OpenTelemetry to provide metrics and tracing. We support sending trace data to Jaeger, Zipkin, and OpenTelemetry Protocol (OTLP) backends.
Works With
Integration
Check out the integration documentation for more info on how to integrate Flipt into your existing applications.
REST API
Flipt is equipped with a fully functional REST API. In fact, the Flipt UI is completely backed by this same API. This means that anything that can be done in the Flipt UI can also be done via the REST API.
The Flipt REST API can also be used with any language that can make HTTP requests.
REST Client Libraries
| Language | Version | Status |
|---|---|---|
| Go |  |
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| Node/TypeScript |  |
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| Java |  |
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| Python |  |
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| Rust |  |
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GRPC Client Libraries
| Language | Version | Status |
|---|---|---|
| Go | |
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| Ruby |  |
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| .NET |  |
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Generate Your Own
If a client in your language is not available for download, you can easily generate one yourself using the existing protobuf definition.
Our integration documentation has more information on how to generate your own Flipt clients in your language of choice.
Development
Development documentation is available for those interested in contributing to Flipt.
We welcome contributions of any kind, including but not limited to bug fixes, feature requests, documentation improvements, and more. Just open an issue or pull request and we'll be happy to help out!
Try It
Try the latest version of Flipt for yourself.
Sandbox
Try Flipt in a deployed environment!
Note: The database gets cleared every 30 minutes in this sandbox environment!
Docker
docker run --rm -p 8080:8080 -p 9000:9000 -t flipt/flipt:latest
Flipt UI will now be reachable at http://127.0.0.1:8080/.
For more permanent methods of running Flipt, see the Installation section.
Nightly Build
Like to live on the edge? Can't wait for the next release? Our nightly builds include the latest changes on main and are built.. well.. nightly.
docker run --rm -p 8080:8080 -p 9000:9000 -t flipt/flipt:nightly
Examples
Check out the examples to see how Flipt works in different use cases.
Licensing
There are currently two types of licenses in place for Flipt:
- Client License
- Server License
Client License
All of the code required to generate GRPC clients in other languages as well as the existing GRPC Go client are licensed under the MIT License.
This code exists in the rpc/ directory.
The client code is the code that you would integrate into your applications, which is why a more permissive license is used.
Server License
The server code is licensed under the GPL 3.0 License.
See LICENSE.
Logos
Some of the organizations depending on Flipt in production.
Using Flipt at your company? Open a PR and add your logo here!
Community
For help and discussion around Flipt, feature flag best practices, and more, join us on Discord.
Feedback
If you are a user of Flipt we'd really ❤ it if you could leave a testimonial on how Flipt is working for you.
Contributing
We would love your help! Before submitting a PR, please read over the Contributing guide.
No contribution is too small, whether it be bug reports/fixes, feature requests, documentation updates, or anything else that can help drive the project forward.
Check out our public roadmap to see what we're working on and where you can help.
Contributors ✨
Thanks goes to these wonderful people (emoji key):
This project follows the all-contributors specification. Contributions of any kind welcome!
Directories