We build AI models
Lesai is an AI research company building state-of-the-art proprietary models. We train from the ground up.
Why We Exist
We started Lesai because we believed the best AI models shouldn't only come from a few big companies. So we built our own—.
Our embeddings outperform OpenAI and Cohere on major benchmarks. Our Legal AI is transforming how lawyers work in Latin America. And we're just getting started.
How We Work
The principles that drive our team.
Ship Fast
We move quickly. Ideas become papers, papers become products, products reach users.
Build in Public
We publish our research, open-source our tools, and share what we learn.
Developer First
We build for developers. Simple APIs, great docs, and tools that just work.
Global Team
Engineers and researchers across the Americas, building AI that works everywhere.
Where We Are
A distributed team building the future of AI.
Delaware
USA
HeadquartersQuito
Ecuador
EngineeringLima
Peru
ResearchSan Salvador
El Salvador
OperationsJoin Us
We're hiring ML engineers, researchers, and developers who want to build world-class AI.