Weights & Biases
San Francisco, US · 7 known investors
Weights & Biases is an AI developer platform that enables teams to build, train, and monitor AI agents, applications, and models with tools for experiment tracking, model management, and agent evaluation.
Founders & leadership
SL
Shawn LewisExecutive Officer, Director
TL
Thomas LaffontDirector
MN
Mariah NagyExecutive Officer
DS
Dan ScholnickDirector
YE
Yan-David ErlichExecutive Officer
CK
Cameron KinlochExecutive Officer
LB
Lukas BiewaldExecutive Officer, Director
CV
Chris Van PeltExecutive Officer, Director
GM
George MathewDirector
Investors · 7
AIX VenturesSan Francisco · $1M – $5M
Brighter CapitalCupertino · $25K – $100Kvia Yun-Fang Juan · inferred
Brilliant Phoenix CapitalVancouver
Felicis VenturesSan Francisco · $500K – $15M
Preston-Werner VenturesSan Francisco Bay Area · $500K – $3M
Qualcomm VenturesSan Diego · $5M
Sapphire VenturesAustin · $5M – $20M
Reported raises · per SEC filings
Form D private placements▶$50MraisedOct 2023 · 14 investors · OtherRule 506(b)
▶$50MraisedOct 2023 · 14 investors · Other
Rule 506(b)Officers, directors & promoters on the filing
- Shawn LewisExecutive Officer, Director
- Thomas LaffontDirector
- Mariah NagyExecutive Officer
- Dan ScholnickDirector
- Yan-David ErlichExecutive Officer
- Cameron KinlochExecutive Officer
- Lukas BiewaldExecutive Officer, Director
- Chris Van PeltExecutive Officer, Director
- George MathewDirector
- Offering amount
- $50M
- Amount sold
- $50M
- First sale
- Jun 2023
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.
In the news
- Best Weights & Biases alternatives for LLM evaluation - Articles - Braintrustbraintrust.dev · 2026
- Weights & Biases Raises $200M Series C | SalesTools AIsalestools.io · 2025
- Weights & Biases raises $135M Series D at | SalesTools AIsalestools.io · 2024
- Weights & Biases, which counts OpenAI as a customer, lands $50M | TechCrunchtechcrunch.com · 2023
- Weights & Biases Raises Its Series C at a Billion Dollar Valuationprnewswire.com · 2021