Life is too short not to
release anytime

a feature flag management tool created by developers for developers with ❤️.

For DevOps

Feature toggles are switches on the ConfigCat user interface representing items in a key-value store for a specific feature.

For Development

Feature toggles are decision points in the application's code whether to enable a functionality or not.

For Product

Feature toggles let you turn a feature ON/OFF for your product's users anytime without deploying new code.

Enable Cool Cat


Switch ON to enable cool cat colors.

var client = configcat.createClient("#API-KEY#");
client.getValue("isCoolCatEnabled", false,
  function(value) {
    if (value) {
    } else {
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Canary Releases, Phased Roll-outs

Testing a new feature on 1%, 5%, 10% of your user base saves the company's reputation in the long term. Turning it up to 100% when everyone is confident.

A/B Testing crazy ideas on real users

Feature toggle driven A/B/n testing on real users enables you to test new theories and get instant feedback on which way to continue.

User Targeting

Target users based on region, email or any attribute and build segments or groups as needed. With ConfigCat Targeting, you have full control over who sees what at any given time.

Dogfooding, Internal Testing

Eating your own dog food, aka releasing a feature to a specified group of users like colleagues or early adopters and getting feedback in time helps to maintain your product's reputation by releasing high-quality software.

Emergency Kill Switch

Separating releases from deployments, lets you turn features ON right when you need them even on Friday. Because if something goes wrong, you will turn them OFF instantly without re-deploying your code.

Team Collaboration

Sharing the control over feature flags with team members is a great way to collaborate and an opportunity for you to avoid being a bottleneck.

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Open source SDKs

We believe that easy integration between your application and ConfigCat is key. So we have created open source SDKs with detailed documentation and getting started guide for all major platforms.