Weights & Biases - About the company
Weights & Biases is an acquired company based in San Francisco (United States), founded in 2017 by Lukas Biewald, Chris Van Pelt and Shawn Lewis. It operates as a Provider of machine learning model development and management solutions. Weights & Biases has raised $250M in funding from investors like Insight Partners, Felicis Ventures and Trinity Ventures, with last known valuation of $1.25B. The company has 392 active competitors, including 64 funded and 13 that have exited. Its top competitors include companies like Lightning, Abacus.AI and DataRobot.
Sectors and market segments that Weights & Biases operate in
Weights & Biases serves in the High Tech, Native AI market segments.The primary business model of Weights & Biases are:Company Details
Provider of machine learning model development and management solutions. The product features include ML experiment and hyperparameters tracking, system metrics, and predictions, visualizing and comparing experiments, dataset versioning, data visualization, and optimization of ML models. It is a tool available on the subscription based pricing model.
- Website
- wandb.ai
- Social
- Email ID
- *****@wandb.com
- Phone Number
- +1 **********
- Registered Address
- San Francisco
Key Metrics
Founded Year
2017
Location
San Francisco, United States
Stage
Acquired
Total Funding
$250M in 5 rounds
Latest Funding Round
Last Known Valuation
$1.25B as on Aug 09, 2023
Investors
Ranked
3rd among 392 active competitors
Employee Count
309 as on Mar 31, 2026
Exit Details
Acquired by CoreWeave (Mar 04, 2025)
Legal entities associated with Weights & Biases
Weights & Biases is associated with 1 legal entity given below:
Legal Entity Name | Date of Incorporation | Revenue | Latest Employee Count | Documents |
|---|---|---|---|---|
WEIGHTS AND BIASES, INC CIN: 822022025 , United States, Active | Jun 22, 2017 | - | 182 (As on Dec 31, 2024) | - |
Weights & Biases's acquisition details
Click here to take a look at Weights & Biases's acquisition in detail
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Weights & Biases's funding and investors
Weights & Biases has raised a total funding of $250M over 5 rounds. Its first funding round was on May 31, 2018. Its latest funding round was a Series C round on Aug 09, 2023 for $50M. 8 investors participated in its latest round. Weights & Biases has 15 institutional investors and 7 angel investors.
Here is the list of recent funding rounds of Weights & Biases:
Filter this list
Filter this listDate of Funding | Funding Amount | Round Name | Post-Money Valuation | Revenue Multiple | Lead Investors | Other Investors |
|---|---|---|---|---|---|---|
Aug 09, 2023 | $50M | Series C | $1.25B | - | ||
Oct 13, 2021 | $135M | Series C | $1B | - | ||
Feb 01, 2021 | $45M | Series B | - | - |
Access funding benchmarks and valuations. Sign up today!View details of Weights & Biases's funding rounds and investors
Weights & Biases' founders and board of directors
Founder? Claim ProfileThe founders of Weights & Biases are Lukas Biewald, Chris Van Pelt and Shawn Lewis. Lukas Biewald is the CEO of Weights & Biases.
Here are the details of Weights & Biases' key team members:
- Lukas Biewald: Former Co-Founder & CEO of Weights & Biases and founder of 2 other companies, Weights And Biases and Figure Eight. They are also an angel investor in 7 startups.Contact Info: 3 email addresses
- Chris Van Pelt: Co-Founder & CISO of Weights & Biases and founder of 2 other companies, Weights And Biases and Figure Eight. Contact Info: 1 email address
- Shawn Lewis: Co-Founder & CTO of Weights & Biases and founder of 2 other companies, Weights And Biases and Beep Factory. Contact Info: 1 email address
View details of Weights & Biases's Founder profiles and Board Members
Weights & Biases' employee count trend
Weights & Biases has 309 employees as of Mar 26. Here is Weights & Biases's employee count trend over the years:
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Weights & Biases's Competitors and alternates
Top competitors of Weights & Biases include Lightning, Abacus.AI and DataRobot. Here is the list of Top 10 competitors of Weights & Biases, ranked by Tracxn score:
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Rank | Company Details | Short Description | Total Funding | Investors | Tracxn Score |
|---|---|---|---|---|---|
1st |  Lightning 2017, New York City (United States), Series C | Provider of low code AI application development software | $127M | 76/100 | |
2nd |  Abacus.AI 2019, San Francisco (United States), Series C | Provides AI based data models creation for data science | $90.3M | 72/100 | |
3rd | Weights & Biases 2017, San Francisco (United States), Acquired | Provider of machine learning model development and management solutions | $250M | 72/100 | |
4th |  DataRobot 2012, Boston (United States), Series G | Provider of an agent workforce platform for enterprise artificial intelligence | $1.05B | 71/100 | |
5th | Anyscale 2019, San Francisco (United States), Series C | Provider of an AI-based open source framework for building distributed applications | $281M | 70/100 | |
6th |  Factory 2023, San Francisco (United States), Series C | Developer of artificial intelligence solutions for industrial automation and optimization | $220M | 69/100 | |
7th | Modular 2017, Mountain View (United States), Series C | Developing next-generation AI development platform | $380M | 67/100 | |
8th |  MindsDB 2017, Berkeley (United States), Series A | Developer of a platform providing business intelligence and analytics solutions | $53.7M | 67/100 | |
9th |  Tecton 2019, San Francisco (United States), Acquired | Provider of a platform for building machine learning models | $160M | 66/100 | |
10th |  Kumo 2021, Mountain View (United States), Series B | Provider of a SaaS-based platform for enterprises for analytics | $37M | 66/100 |
Get insights and benchmarks for competitors of 2M+ companies! Sign up today!Looking for more details on Weights & Biases's competitors? Click here to see the top ones
Weights & Biases's Investments and acquisitions
Weights & Biases has made no investments or acquisitions yet.
News related to Weights & Biases
Filter this listMedia has covered Weights & Biases for a total of 2 events in the last 1 year, 2 of them have been about partnerships.
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Weights & Biases partners with LG CNS to launch finance-specialized LLM leaderboard 'Hwangso'Korea Newswire•Sep 29, 2025•Weights & Biases, LG CNS
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CoreWeave Launches New AI Cloud Capabilities Aimed at Rapid AI DevelopmentDEVOPSdigest•Jun 19, 2025•CoreWeave, Weights & Biases
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LG CNS inks deal with Weights & Biases for agentic AIThe Korea Times•Mar 20, 2025•LG CNS, Weights & Biases
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CoreWeave’s Acquisition of Weights & BiasesGlobal Legal Chronicle•Mar 14, 2025•CoreWeave, Weights & Biases
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CoreWeave Aims to Expand AI Capabilities with Weights & Biases Acquisitionbigdatawire.com•Mar 11, 2025•CoreWeave, Weights & Biases
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Nvidia-backed CoreWeave to buy AI developer platform Weights & BiasesSeeking Alpha•Mar 05, 2025•CoreWeave, Weights & Biases
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Startups CoreWeave Acquires Weights & Biases in a $1.7 Billion AI Cloud PlayMaginative•Mar 05, 2025•CoreWeave, Weights & Biases
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Nvidia-backed CoreWeave To Acquire AI Developer Platform Ahead of IPOCoinDesk•Mar 05, 2025•CoreWeave, Weights & Biases
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