Open Source. Open minded.

APIs are hard made human

It all started with a problem. API testing was slowing us down in building a software startup. The available solutions were tedious and inefficient. We decided to stop for a moment and build a better tool. It worked. The result helped us find our flow again. We made it available to the community as an open-source project. That humble tool quickly captured developers’ hearts and gradually became one of the top projects on GitHub.

We’re now building on top of that success. The power and virtually limitless potential of APIs captivate us. There’s still a lot of work to be done to unleash them fully. We’re on a mission to make APIs simple and intuitive for all those building the tools, apps, and technologies of our time. We truly believe that APIs have the capacity to make our world a better place.

We’re building a platform for API development. Applying the same principles that made our original tool so beloved. The vision is an uncompromisingly simple and human-centric yet powerful ecosystem of tools and services helping developers and companies throughout the API lifecycle. Especially in places where humans and APIs intersect.


Our extended team includes external talent with whom we collaborate on design and development — Koto, Evil Martians, SwingDev.

Jakub Roztocil

Founder & CEO

Cláudia Delgado


Mickaël Schoentgen


Join us

We’re a small tight-knit team on the lookout for colleagues in various roles.

Our Investors

Alexander Izydorczyk

Head of Data Science at Coatue

David Cahn

Partner at Coatue

Ophelia Brown

Founder at Blossom Capital

Imhran Ghory

Partner at Blossom Capital

Open Source. Open hearted. Open minded.

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