[fizx]

If I was a bootstrapped startup, I'd do a json file and then when I've outgrown, I'd hand write something that long-polls a CDN for updates, with a tiny rails or react app behind the CDN.

But these approaches are insane for companies above a certain size, where individuals are being hired and fired regularly, security matters, and feature flags are in the critical path of revenue.

Last time I looked at LaunchDarkly Enterprise licensing, it started at $50k/year, and included SAML.

Now that sounds like a lot, but if you're well past the startup stage, you need a tiny team to manage your homegrown platform. Maybe you have other things for them to do as well, but you probably need 3 people devoting at least 25% of their time to this, in order to maintain. So that's at least $175k/year in the USA, and if your company is growing, then probably the opportunity cost is higher.