Which of these you should actually use
Last updated 20 September 2026
Klor is not the right answer for most of these situations, and pages that pretend otherwise are not worth reading. Here is the short version, then the detail.
The short version
Firebase Remote Config if your config is a handful of values, you are already in the Firebase console, and nothing about your problem is urgent. It is free and it works.
LaunchDarkly if you have an organisation rather than a team: approvals, audit requirements, role based access, an SLA someone in procurement will read, and the budget that comes with all of it.
Statsig if the point is the experiment. If you want to know whether the variant moved a metric, and you want the statistics done for you, that is a different product from a config store and Statsig is good at it.
ConfigCat if you want a straightforward flag service with per seat pricing and no ambition beyond that. It is the closest thing to Klor on this list.
Klor if you are shipping a mobile app, you need force update and remote config from one place, and you would rather your users' attributes never left their devices. That is a narrow case, and it is the one Klor is built for.
What Klor deliberately does not do
Experimentation. Measuring whether a variant moved a metric requires logging which user saw which arm, and that means shipping user identifiers off the device, which is the one property Klor is organised around not doing. Klor will tell you what it served and how often; it will not tell you whether it worked. Pipe the assignment into whatever analytics you already have, or use a tool built for it.
Approval workflows, SSO and SCIM. These are real requirements for real companies and Klor has none of them.
Self hosting. Klor runs on Cloudflare and there is no box you can run yourself. If that is a hard requirement, Flagsmith and Unleash are open source and worth your time.