unstained
Open-source, Stainless-compatible SDK generation.
Drop in your stainless.yml. Get the same SDKs out. Apache 2.0-licensed. No lock-in, ever.
Why now
Stainless was acquired by Anthropic. For their existing customers, that means a new owner, a new roadmap, and a new set of priorities — pointed at Anthropic-aligned use cases.
Pricing will change. Focus will narrow. And the parts of the product that don’t serve Anthropic’s strategy will quietly stop getting investment.
Unstained is Apache 2.0-licensed. This is the last time you’ll have to migrate.
How it works
- Point us at your existing
stainless.yml. - Our open-source generator produces the same SDKs.
- Publish them to your existing package registries.
Self-host or use ours
Run it yourself
$ npx unstained build
Free, forever. No account, no telemetry, no lock-in.
Let us run it
We handle generation, versioning, and publishing. Talk to a founder.
Languages
python typescript go java kotlin ruby