Meet the team and contributors

Who are we?

Mockoon is a free and open-source API sandboxing tool created in 2017 by Guillaume, a developer passionate about APIs and building great tools for other developers. Since day one, the goal has been clear: make API sandboxing and virtualization simple, fast, and accessible to everyone. Mockoon is a free and open-source API tool created by in 2017.

Helped by dozens of amazing contributors, Guillaume continues to maintain and grow the project with a strong focus on simplicity, efficiency, and developer experience. Mockoon is designed to save you time — not waste it — by being easy to set up yet powerful enough for complex use cases. Today, Mockoon is used by thousands of developers and teams worldwide, from solo devs to large companies, and has been downloaded over 900,000 times.

How do we finance Mockoon?

We are proud to be an independent open-source project, maintained without external funding or venture capital. Mockoon is sustained through a mix of community support and our commercial offering, Mockoon Cloud.

If you believe in what we're building, you can sponsor us and join the growing community of backers helping keep the project alive and evolving. Subscribing to Mockoon Cloud is another great way to support us — and it comes with powerful features like AI-powered API mock generation, real-time team collaboration, cloud deployments, and more. Your support helps us remain sustainable while keeping the core project free and open for everyone.