How much funding has Weights & Biases raised?

Weights & Biases has raised $350.0M in total funding, most recently a Series D round.

Who are Weights & Biases's investors?

Weights & Biases's investors include Coatue Management, Daniel Gross, Nat Friedman, Trinity Ventures, Insight Partners, Sapphire Ventures.

When was Weights & Biases founded?

Weights & Biases was founded in 2017.

Where is Weights & Biases headquartered?

Weights & Biases is headquartered in San Francisco, California, United States.

What industry is Weights & Biases in?

Weights & Biases operates in Artificial Intelligence, Developer Tools, SaaS.

How many employees does Weights & Biases have?

Weights & Biases has 201-500 employees.

Weights & Biases

formerly Weights and Biases

Build better models faster.

San Francisco, United States · Founded 2017 · $350.0M raised

Artificial Intelligence

Developer Tools

SaaS

Headquarters: San Francisco, California
Employees: 201–500
Founded: 2017
Business Model: B2B

Website: wandb.ai
Total Funding: $350.0M
Last Round: $200.0M Series DJan 2024
Rounds: 4

About

Weights & Biases (W&B) is an AI developer platform founded in 2017 by Lukas Biewald, Chris Van Pelt, and Shawn Lewis. It provides tools for experiment tracking, model evaluation, dataset versioning, and LLM observability used by millions of ML practitioners at companies including OpenAI, NVIDIA, and Cohere. W&B was acquired by CoreWeave in May 2025.

Summary

Weights & Biases is an Artificial Intelligence company based in San Francisco, United States, founded in 2017. It has raised $350.0M in total across 4 rounds, most recently a $200.0M Series D round in Jan 2024. Investors include Coatue Management, Daniel Gross and Nat Friedman.

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