Name
Guillaume Monnet
GitHub Handle
@255kb
Tell us about yourself
Hi, I'm Guillaume, the founder and maintainer of Mockoon, an open-source API mocking tool I started in 2017. I'm a lawyer turned full-stack developer based in Luxembourg, and for the past few years, I've been fully focused on growing and maintaining the Mockoon ecosystem, both the open-source app and the new cloud platform. My goal has always been to build simple, efficient tools that help developers save time, while keeping the project sustainable and true to its open-source roots.
Project Name
Mockoon
Project Repo Link
https://github.com/mockoon/mockoon
Stream Date
Dates
09-26-2025
Twitter URL
No response
LinkedIn URL
https://www.linkedin.com/in/guillaumemonnet/
Additional Information
Mockoon is a free and open-source API mocking platform I started back in 2017. It began as a side project to solve a personal need, spinning up quick mock APIs without writing code, and slowly evolved into something much bigger. Today, it's a full-featured ecosystem used by thousands of developers and teams around the world, from small startups to large financial institutions.
The goal has always been to make mocking APIs as simple and fast as possible, whether you're working locally with the desktop app, in CI with the CLI, or collaborating in the cloud with your team.
Some interesting topics we could explore during the interview:
- How Mockoon grew from a weekend project to a widely adopted developer tool
- The challenges (and joys!) of maintaining an open-source project long-term
- What sustainability looks like for solo maintainers
- Balancing open-source values with the need to build a sustainable business
- Lessons learned from working with the open-source community over the years
Thanks!
Name
Guillaume Monnet
GitHub Handle
@255kb
Tell us about yourself
Hi, I'm Guillaume, the founder and maintainer of Mockoon, an open-source API mocking tool I started in 2017. I'm a lawyer turned full-stack developer based in Luxembourg, and for the past few years, I've been fully focused on growing and maintaining the Mockoon ecosystem, both the open-source app and the new cloud platform. My goal has always been to build simple, efficient tools that help developers save time, while keeping the project sustainable and true to its open-source roots.
Project Name
Mockoon
Project Repo Link
https://github.com/mockoon/mockoon
Stream Date
Dates
09-26-2025
Twitter URL
No response
LinkedIn URL
https://www.linkedin.com/in/guillaumemonnet/
Additional Information
Mockoon is a free and open-source API mocking platform I started back in 2017. It began as a side project to solve a personal need, spinning up quick mock APIs without writing code, and slowly evolved into something much bigger. Today, it's a full-featured ecosystem used by thousands of developers and teams around the world, from small startups to large financial institutions.
The goal has always been to make mocking APIs as simple and fast as possible, whether you're working locally with the desktop app, in CI with the CLI, or collaborating in the cloud with your team.
Some interesting topics we could explore during the interview:
Thanks!