Yan-David Erlich is a General Partner at B Capital focused on AI and technology investments from seed to pre-IPO, and was formerly COO and CRO at Weights & Biases, an AI developer platform.

Erlich is a four-time venture-backed founder and CEO who built Parsable, ChoiceVendor (acquired by LinkedIn), Mogad (acquired by iSkoot/Qualcomm), and Happiness Engines. He holds BS degrees in Computer Science and Electrical & Computer Engineering from Rice University and an MBA from Stanford Graduate School of Business.

Erlich was an angel investor in Weights & Biases at seed stage and led the Series A representing Coatue Management before joining operationally in June 2021. He is an active angel investor in companies including Thumbtack, MasterClass, and has invested in Perplexity, Unblocked, and Goodfire.

At Weights & Biases, Erlich scaled the business from 200 customers to 1200 customers in 3 years, building out sales, customer success, partnerships, strategy, and data science teams. He previously served as General Partner at Coatue Management where he led the enterprise software investing practice and made AI investments across multiple Series A and B rounds.

During his tenure, Erlich helped Weights & Biases grow into a unicorn valued at $1.25 billion with $250M raised before its acquisition by CoreWeave in 2025. He started his career with software engineering and product management roles at Microsoft and Google, bringing deep technical expertise to his operational and investing work.