
Garreth Lee
Building multilingual AI, ex-Hugging Face ML Engineer
San Francisco, California
Joined January 2025
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Summary
Garreth Lee is a co-founder of Mundo AI, a Y Combinator-backed startup focused on creating high-quality multilingual training data for AI models. This venture aims to bridge the language gap in AI, making models more accessible and effective for non-English speakers worldwide. ycombinator+1
He possesses a strong background in Machine Learning Engineering, having contributed to major AI platforms like Hugging Face, where he helped develop open pre-training datasets, and Cohere, where his work focused on pretraining data and tokenization. His personal website and Hugging Face profile showcase his expertise in these areas, including research on how tokenization impacts arithmetic in LLMs. ycombinator+3
Before his deep dive into AI, Garreth had significant experience in finance, including roles as an Investment Banking Analyst at Goldman Sachs and internships at Temasek and PrimeMovers Equity. This diverse background suggests a blend of analytical rigor and technological innovation. primemoversequity
Work
Education
Notes
JPJay Parksaid
GLGarreth Lee
is one of the most impressive founders or early team members they've seen leading a startup focused on providing unique data sets for AI training.Feb 25, 2026
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