Integrate Freemius with your SaaS Application using SDKs & Starter Kits

Welcome to the Freemius SaaS SDKs & Starter Kits documentation! Freemius already provides straightforward Checkout Integration, a robust API, and a Webhook system, making it easy to integrate Freemius Monetization into your SaaS applications.

However, to further simplify the integration process, we offer a variety of SDKs and Starter Kits designed to help you get up and running quickly.

Here you will find step‑by‑step walkthrough of backend checkout generation, secure purchase validation, local entitlement storage, webhook‑driven license lifecycle syncing, and feature gating logic.

You can either start with one of our Framework Integration Guides or get straight to our JavaScript SDK and the React Starter Kit.