SubKit is a free and open source subscription infrastructure for mobile apps. It gives independent developers and small studios the subscription analytics, receipt validation, entitlements, and paywall analytics they need, without depending on closed third party SaaS.

SubKit is fully self-hostable. You run it on your own infrastructure, your subscription data stays inside your boundary, and there is no central third party between your app and your users. It ships with a Go backend, native iOS and Android SDKs, and a web dashboard, and it is built on open standards (CloudEvents and OpenAPI 3.1) so it interoperates cleanly with the rest of your stack.

Licensed under AGPL-3.0.