[rekoros]

If you’re looking for an open source feature flag option, also check out https://www.growthbook.io/

[hardwaresofton]

There are... a bunch of them. I write a little blog (soon to be directory site) about open source and at this point I groan a little bit when I see another one (wonderful problem to have of course):

https://awsmfoss.com/flagsmith

https://awsmfoss.com/unleash

https://awsmfoss.com/featbit

https://awsmfoss.com/flagr

[peab]

I introduced feature flags at my last company, and ended up choosing growthbook. I love how compute experiment buckets with local hashing, so you don't have to make roundtrip server calls to get flag values.

[socksy]

In a similar vein there's also Unleash with a similar open core model https://github.com/Unleash/unleash

[valtlfelipe]

There is also https://www.flipt.io/ which is open source. I'm currently building https://flaggy.dev/ to be simple and aiming the best user experience, but initially it will not be open source.