About round3
We build the tools for self-owned AI
three.dev is our first product. It shows what your AI gets wrong in production, lets your coding agent fix it, then compares before and after.
We've built developer tools before
Years building systems at Microsoft, Telefónica, Docker, and Datadog. Now pointed at the hardest open question in production AI.
Path to round3
- TutumAcquired by Docker, 2015
- DockerDirector of Product
- Undefined LabsAcquired by Datadog, 2020
- DatadogDirector of Product
- round3Co-founder & CEO
Borja Burgos
Co-founder & CEO
A developer-experience obsessive on a third startup. Borja co-founded Tutum, a platform for running Docker apps that Docker acquired in 2015, then Undefined Labs, a testing and observability company Datadog acquired in 2020, and went on to lead product for developer-focused observability at Datadog.
Path to round3
- MicrosoftSoftware developer
- TelefónicaSenior Principal Software Engineer
- CoinffeineCo-founder & CTO
- DatadogStaff Software Engineer
- round3Co-founder & CTO
Ximo Guanter
Co-founder & CTO
A career spent building systems that have to work. Ximo spent four years as a developer at Microsoft, was a Senior Principal Software Engineer at Telefónica, co-founded the peer-to-peer Bitcoin exchange Coinffeine as CTO, and built large-scale data systems at Datadog as a Staff Software Engineer.
The people who build three.dev
Building an AI product?
Get a demo
See what three.dev finds in your AI's conversations, and how your coding agent fixes it.
Want to build this with us?
Small team. Big problem.
We're always glad to hear from people who care about developer tools, AI quality, and models that do one job very well.