Weights & Biases: Funding, Investors & Team (Sep 2026)
Weights & Biases offers performance visualization tools for machine learning. It helps companies turn deep learning research projects into deployed software by helping teams track their models, visualize model performance, and easily automate training and improving models. It was formed in 2018 by Chris Van Pelt, Lukas Biewald, and Shawn Lewis and is headquartered in San Francisco, California.
Weights & Biases has raised $230M across 4 funding rounds on record, the most recent an undisclosed round of $50.0M announced in Aug 2023.
That round is above the $5.7M median round size for Artificial Intelligence companies tracked on FundedIQ over the last two years.
Weights & Biases Company Profile and Key Stats
Latest funding round on record: Aug 2023.
Weights & Biases Funding Rounds
1 of 4 rounds was announced without a disclosed amount and is excluded from the total.
Weights & Biases raised $45.0M in a Series B announced in Feb 2021.
8 months later, a Series C of $135M was announced in Oct 2021.
7 months later, a Corporate Round was announced in May 2022 with no disclosed amount.
1.3 years later, an undisclosed round of $50.0M was announced in Aug 2023.
Weights & Biases Founders and Leadership Team
Contact details for the Weights & Biases team: 1 of 2 have an email address on file.
Start 14-day free trial →Weights & Biases Funding Compared to Other Artificial Intelligence Startups
Weights & Biases' latest round of $50.0M is above the median round in Artificial Intelligence. Medians cover the last 24 months of disclosed rounds.
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Weights & Biases Funding FAQs
What does Weights & Biases do?
Weights & Biases offers performance visualization tools for machine learning. It helps companies turn deep learning research projects into deployed software by helping teams track their models, visualize model performance, and easily automate training and improving models. It was formed in 2018 by Chris Van Pelt, Lukas Biewald, and Shawn Lewis and is headquartered in San Francisco, California.
How much funding has Weights & Biases raised?
Weights & Biases has raised $230M across 4 rounds on record. The most recent is an undisclosed round of $50.0M announced in Aug 2023.
When did Weights & Biases last raise funding?
Weights & Biases' most recent funding round on record is an undisclosed round of $50.0M, announced in Aug 2023.
Who founded Weights & Biases?
FundedIQ lists Chris Van Pelt (Founder) at Weights & Biases.
Who is the CEO of Weights & Biases?
Lukas Biewald is listed as CEO at Weights & Biases.
Where is Weights & Biases headquartered?
Weights & Biases is based in San Francisco, California, United States.
How many employees does Weights & Biases have?
Weights & Biases is in the 101-250 employee band.
How does Weights & Biases' funding compare to other Artificial Intelligence startups?
Weights & Biases' latest round of $50.0M is above the $5.7M median round size for Artificial Intelligence companies on FundedIQ across 7,234 tracked companies over the last two years.
About FundedIQ's Weights & Biases Funding Data
FundedIQ tracks announced funding rounds and refreshes this profile every week. Round dates, stages and amounts are normalised to a single format, converted to US dollars, and de-duplicated: two records of the same round announced days apart are merged, and two genuinely different rounds are kept apart on the amounts they disclose. Amounts shown are the disclosed figures only — a round announced without a number is listed and excluded from the total rather than estimated.
Employee counts are reported bands, not exact headcounts. Founder and executive names carry the job title on record. Anything we do not hold for Weights & Biases is left off this page rather than filled in.
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