Flagsmith
Open source feature flagging and remote config service
...Just wrap a section of code with a flag, and then use Flagsmith to manage that feature. Manage feature flags by the development environment, and for individual users, a segment of users, or a percentage. This means quickly implementing practices like canary deployments. Multivariate flags allow you to use a percentage split across two or more variations for precise A/B/n testing and experimentation.