About

We’re building the platform we wish existed.

Every SaaS team rebuilds the same infrastructure: auth, billing, feature flags, observability, and dozens of other shared concerns. We’ve done it ourselves — multiple times — and we’re tired of it.

Flux is the platform that handles all of it, so you can focus on what makes your product unique.

Built in Rust

We chose Rust because your infrastructure should never be the bottleneck. Single-digit microsecond latency on auth decisions, flag evaluations, and rate limit checks — that’s what Rust gives us.

But Flux isn’t just for Rust developers. We have SDKs for every major language and framework. Rust powers the engine; you drive it from wherever you’re most comfortable.

Open and Transparent

We believe in building in the open. Our changelog shows everything we ship. Our blog shares how we build it. Our comparisons are honest about where alternatives might be a better fit.