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Unleash is an amazing open source feature management tool:

https://www.getunleash.io/

It would probably take some effort to hook it up to whatever billing platform you use, but it would make it easy to turn certain features on/off based on billing. Instead of checking if a customer has a specific plan, you instead have Unleash handle the features that are on/off and then check for those flags in the code.



Source code at https://github.com/Unleash/unleash

Setup instructions and SDKs for a number of languages in the README.


Thanks for the link - am I getting it right that this is a Feature Flag system akin https://www.growthbook.io/ and PostHog Flags (also OSS)? At least I got this impression from their landing page.


It looks similar, but Unleash has a lot of really awesome features that let you configure rules for when flags are enabled/disabled. Stuff like turning them on for specific domains or customer or any other metadata you can feed into it.




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