I built Plain Flags to use in my own products. When discussing adoption of feature flags with coworkers a while ago, the main reasons for reluctance were technology lock-in and paid plans for all established solutions at the time. With Plain Flags I don't get these impediments, and I aim for everyone to enjoy the same relief. Plain Flags is free, there are no paid plans. You host Plain Flags on your own resources, and fully own your feature data. You can even build your own from source code if it suits you better. If you write software in Typescript, Python, Go, Dart/Flutter, then Plain Flags has an available SDK for convenient usage. You can use Plain Flags with other languages if you can handle some coding; the protocol is documented on the website. Also, ask me and I will try to find the time to write a new SDK for your preferred language. I'll be grateful for any feature request and bug reports you add on the GitHub repository's issues section.

Plain Flags

Free self hosted feature flag system

Free self hosted feature flag system