unleash-server
Advanced tools
Unleash is an enterprise ready feature flag service. It provides different strategies for handling feature flags.
Unleash is a powerful open-source solution for feature management. It streamlines your development workflow, accelerates software delivery, and empowers teams to control how and when they roll out new features to end users. With Unleash, you can deploy code to production in smaller, more manageable releases at your own pace.
Feature flags in Unleash let you test your code with real production data, reducing the risk of negatively impacting your users' experience. It also enables your team to work on multiple features simultaneously without the need for separate feature branches.
Unleash is the most popular open-source solution for feature flagging on GitHub. It supports 15 official client and server SDKs and over 15 community SDKs. You can even create your own SDK if you wish. Unleash is compatible with any language and framework.
To get started with Unleash, you can either explore Unleash Enterprise with a free trial or get started locally with our open-source solution.
To start with Unleash Enterprise, request a free trial. This gives you access to a hosted instance with unlimited projects and environments and features such as role-based access control, change requests, single sign-on, and SCIM for automatic user provisioning.
To set up Unleash locally, you'll need git and docker installed on your machine.
Execute the following commands:
git clone git@github.com:Unleash/unleash.git
cd unleash
docker compose up -d
Then point your browser to localhost:4242 and log in using:
adminunleash4allIf you'd rather run the source code in this repo directly via Node.js, see the step-by-step instructions to get up and running in the contributing guide.
Find your preferred SDK in our list of official SDKs and import it into your project. Follow the setup guides for your specific SDK.
If you use the docker compose file from the previous step, here's the configuration details you'll need to get going:
http://localhost:4242/api/frontend/clientKey: default:development.unleash-insecure-frontend-api-tokenhttp://localhost:4242/api/default:development.unleash-insecure-api-tokenIf you use a different setup, your configuration details will most likely also be different.
Checking the state of a feature flag in your code is easy! The syntax will vary depending on your language, but all you need is a simple function call to check whether a flag is available. Here's how it might look in Java:
if (unleash.isEnabled("AwesomeFeature")) {
// do new, flashy thing
} else {
// do old, boring stuff
}
If you don't want to run Unleash locally, we also provide easy deployment setups for Heroku and Digital Ocean:
The above sections show you how to get up and running quickly and easily. When you're ready to start configuring and customizing Unleash for your own environment, check out the documentation for getting started with self-managed deployments, Unleash configuration options, or running Unleash locally via docker.
Try out the Unleash online demo.
We know that learning a new tool can be hard and time-consuming. We have a growing community that loves to help out. Please don't hesitate to reach out for help.
š¬ Join Unleash on Slack if you want ask open questions about Unleash, feature toggling or discuss these topics in general.
š» Create a GitHub issue if you have found a bug or have ideas on how to improve Unleash.
š Visit the documentation for more in-depth descriptions, how-to guides, and more.
š Learn more about the principles of building and scaling feature flag solutions.
Unleash is the largest open-source feature flag solution on GitHub. Building Unleash is a collaborative effort, and we owe a lot of gratitude to many smart and talented individuals. Building it together with the community ensures that we build a product that solves real problems for real people. We'd love to have your help too: Please feel free to open issues or provide pull requests.
Check out the CONTRIBUTING.md file for contribution guidelines and the Unleash developer guide for tips on environment setup, running the tests, and running Unleash from source.
If you're looking for one of the following features, please take a look at our Pro and Enterprise plans:
Read more in the system overview section of the Unleash documentation.
To connect your application to Unleash you'll need to use a client SDK for your programming language.
Official server-side SDKs:
Official front-end SDKs:
The front-end SDKs connect via Unleash Edge in order to ensure privacy, scalability and security.
Community SDKs:
If none of the official SDKs fit your need, there's also a number of community-developed SDKs where you might find an implementation for your preferred language (such as Elixir, Dart, Clojure, and more).
Unleash is trusted by thousands of companies all over the world.
Proud Open-Source users: (send us a message if you want to add your logo here)
Unleash has evolved significantly over the past few years, and we know how hard it can be to keep software up to date. If you're using the current major version, upgrading shouldn't be an issue. If you're on a previous major version, check out the Unleash migration guide!
[6.5.1] - 2024-12-12
Ignore segment order in diff calculation (#8880)
Permission button tooltip behavior (#8882)
Swap subscribe and unsubscribe events (#8900)
Update dependency json-2-csv to v5.5.7 (#8917)
Permission button unintended full width behavior (#8920)
Adjust favorite icon placement (#8930)
Move productivity report to features dir (#8960)
Make project ui query optimized (#8961)
Productivity report small screens (#8963)
Clear "removed tags" when you bulk update tags (#8952)
Migrations e2e test (#8965)
Remove unused vulnerable transitive dependency 'prompt' (#8953)
E2e cypress create flag delay (#8968)
Do not initialize cache when flag is off (#8969)
Upgrade make-fetch-happen (#8970)
Readme architecture diagram (#8881)
Enviroment->environment (#8893)
Update React Native / Expo community SDK entry (#8902)
Trunk-based development use case tutorial (#8867)
Switch recommendation from proxy to edge (#8908)
Fixed diff syntax (#8937)
Favorites take less space (#8888)
Add variant etag (#8922)
Productivity report cta (#8936)
Additional email headers test (#8540)
Release plan template milestone UI listing strategies (#8933)
Health rating color in email (#8943)
OIDC redirect flag (#8944)
Add core feature alert gh action (#8948)
Maintenance root roles (#8875)
Productivity report trends visualization (#8956)
Make segments editing work with template milestone strategies (#8964)
Productivity email action text (#8966)
First revision of delta api (#8967)
Release plans small misc improvements (#8879)
Remove release-checks (#8884)
Enabled in OSS. (#8856)
Filter out milestone strategies in features_view (#8883)
Update release plans icon (#8894)
Improve release plan events and add them to event timeline (#8895)
Streaming spike (#8907)
Streaming node sdk (#8921)
Default metrics storage days updated (#8931)
View more insights color update (#8938)
Update node sdk (#8940)
Remove oidc UI flag (#8949)
Make toasts smaller (#8935)
Remove uses of toast text and confetti (#8941)
Remove console.log
Remove docker package setup. (#8959)
FAQs
Unleash is an enterprise ready feature flag service. It provides different strategies for handling feature flags.
The npm package unleash-server receives a total of 4,453 weekly downloads. As such, unleash-server popularity was classified as popular.
We found that unleash-server demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago.Ā It has 4 open source maintainers collaborating on the project.
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