ConfigCat

ConfigCat allows you to deploy code without making the corresponding features live on your site. The configuration management and feature flag solution enables you to turn on and off features even after you have already deployed the code through ConfigCat's Management Console. You can also target deployments and releases according to different criteria, such as region in the world, email, or a custom attribute that you have chosen yourself. Developers can deploy code even when it is not complete, as they don’t have to make the feature live immediately, but can chose to deploy it in the future. You can choose a percentage of your user base to release the new features to, meaning you can soft launch, get feedback, and then choose to launch the feature fully when you’ve made changes. ConfigCat also allows you to A/B test any feature, and to implement feature toggles and flags for rapid disaster recovery.