When was Weights & Biases founded?

Weights & Biases was founded in 2017 and raised its 1st funding round 1 year after it was founded.

Where is Weights & Biases located?

Weights & Biases is headquartered in San Francisco, United States. It is registered at San Francisco.

Who is the current CEO of Weights & Biases?

Lukas Biewald of Weights & Biases. They have also founded 2 companies and are angel investors in 7 startups, including Weights And Biases and Figure Eight.

How many employees does Weights & Biases have?

As of Aug 31, 2026, the latest employee count at Weights & Biases is 292.

Is Weights & Biases a funded company?

Weights & Biases is a funded company, having raised a total of $250M across 5 funding rounds to date. The company's 1st funding round was a $5M Series A round, raised on May 31, 2018.

How much is Weights & Biases worth?

The last known valuation of Weights & Biases was $1.25B as of Aug 09, 2023.

When was the latest funding round of Weights & Biases?

Weights & Biases' latest funding was a $50M Series C round on Aug 09, 2023, with participation from 8 investors. Its primary sector is AI Infrastructure. In United States, the AI Infrastructure sector has seen $265B in funding in 2026 to date.

Is Weights & Biases a AI Infrastructure company?

The primary sectors of Weights & Biases are AI Infrastructure and Artificial Intelligence.

Where does Weights & Biases rank among its competitors?

Weights & Biases ranks 3rd amongst 530 active competitors, of which 69 are funded. It stands 6th in terms of total funding among its competitors. The most recent competitor to raise funding was Factory, which secured $200M in Sep, 2026.

Who are the top competitors of Weights & Biases?

Weights & Biases' top competitors include Lightning, Anyscale and DataRobot. Among them, Factory secured the most recent funding round in September, 2026.

Weights & Biases - 2026 Company Profile, Team, Funding & Competitors

Q: Is Weights & Biases an acquired company?

Weights & Biases got acquired by CoreWeave on Mar 04, 2025.

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

Series C, Aug 09, 2023, $50M

Last Known Valuation

$1.25B as on Aug 09, 2023

Investors

Insight Partners & 23 more

Ranked

3^rd among 530 active competitors

Employee Count

292 as on Aug 31, 2026

Investment & Acquisitions

Prox

Similar Companies

Lightning & 493 more

Exit Details

Acquired by CoreWeave (Mar 04, 2025)

View Weights & Biases' full profile

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 got acquired by CoreWeave on Mar 04, 2025 at an acquisition amount of $*****.

Click here to take a look at Weights & Biases's acquisition in detail

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 17 institutional investors and 7 angel investors.

Here is the list of recent funding rounds of Weights & Biases:

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Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Aug 09, 2023	$50M	Series C	$1.25B	-	Nat Friedman, Daniel Gross	Sapphire Ventures, Coatue, Insight Partners, Felicis Ventures, Bond Capital, Bloomberg Beta
Oct 13, 2021	$135M	Series C	$1B	-	Felicis Ventures, Bond Capital	Insight Partners, Coatue
Feb 01, 2021	$45M	Series B	-	-	Insight Partners	Coatue, Trinity Ventures, Bloomberg Beta, Nat Friedman, Jeff Hammerbacher, Pieter Abbeel, Richard Socher, Tom Preston-Werner

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View details of Weights & Biases's funding rounds and investors

The 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 292 employees as of Aug 26. Here is Weights & Biases's employee count trend over the years:

Employee count trend for Weights & Biases

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Top competitors of Weights & Biases include Lightning, Anyscale and DataRobot. Here is the list of Top 10 competitors of Weights & Biases, ranked by Tracxn score:

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	NVentures, Coatue & 11 others	76/100
2nd	Anyscale 2019, San Francisco (United States), Acquired	Provider of an AI-based open source framework for building distributed applications	$281M	Andreessen Horowitz, Addition & 12 others	73/100
3rd	Weights & Biases 2017, San Francisco (United States), Acquired	Provider of machine learning model development and management solutions	$250M	Sapphire Ventures, Qualcomm Ventures & 22 others	72/100
4th	DataRobot 2012, Boston (United States), Series G	Provider of an agent workforce platform for enterprise artificial intelligence	$1.05B	New Enterprise Associates, Sapphire Ventures ... & 77 others	71/100
5th	Factory 2023, San Francisco (United States), Series D	Developer of artificial intelligence solutions for industrial automation and optimization	$420M	Sequoia Capital, Khosla Ventures & 28 others	70/100
6th	Modular 2017, Mountain View (United States), Acquired	Developing next-generation AI development platform	$380M	Google Ventures, Usitfund & 7 others	69/100
7th	Kumo 2021, Mountain View (United States), Acquired	Provider of a SaaS-based platform for enterprises for analytics	$37M	Sequoia Capital, A.Capital Ventures & 16 others	69/100
8th	Abacus.AI 2019, San Francisco (United States), Series C	Provides AI based data models creation for data science	$90.3M	Tiger Global Management, Coatue & 22 others	66/100
9th	Graft 2021, San Francisco (United States), Acquired	Developer of an AI platform for enterprise knowledge management and search	$29M	Google Ventures, Radical Ventures & 5 others	66/100
10th	4Paradigm 2014, Beijing (China), Public	Provider of enterprise-level artificial intelligence solutions and machine learning platforms	$1.07B	Industrial and Commercial Bank of China, Hopu Investments ... & 40 others	65/100