Weights & Biases Current · Verified less than 14 days ago · Last verified: Oct 19, 2026

Weights & Biases: $2.5B valuation, IPO Readiness 77, Series F. Weights & Biases (W&B) is the machine learning experimentation platform enabling data scientists to track expe. Track live on The IPO Stack.

Series FArtificial Intelligencepre-ipo
77
/100
IPO Readiness Score
Grade B — Moderate IPO Readiness
TechStackIPO proprietary score based on funding scale, valuation, stage progression & momentum.
Track Weights & Biases →

Weights & Biases (W&B) is the machine learning experimentation platform enabling data scientists to track experiments, evaluate models, compare results, and collaborate on AI development. Valued at $1.25B with $200M raised, W&B has 1M+ users and serves research teams at Google, OpenAI, Anthropic, and Salesforce. Major AI infrastructure IPO candidate competing with MLflow and Neptune.ai in the $30B+ MLops market.

Valuation
$2.5B
Total Funding
$850M
Stage
Series F
Sector
Artificial Intelligence
Headquarters
San Francisco, CA
CEO
Lukas Biewald
IPO Status
pre-ipo

Funding History

August 2026
Series F
$200M
October 2021
Series C
$135M
April 2021
Series B
$45M
August 2019
Series A
$15M
September 2017
Seed
$4M
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Track Weights & Biases IPO timeline, funding rounds, investor activity, and valuation on TechStackIPO — the pre-IPO intelligence platform.

Frequently Asked Questions

When is Weights & Biases going public? +

Weights & Biases has not announced a specific IPO date as of 2026. With an IPO Readiness Score of 77/100, the company shows strong pre-IPO signals. Subscribe to The IPO Stack newsletter for weekly updates.

What is Weights & Biases's current valuation? +

Weights & Biases is valued at $2.5B as of October 2021. This valuation is based on its most recent private funding round tracked by TechStackIPO.

How can I invest in Weights & Biases before IPO? +

Accredited investors can access Weights & Biases shares through secondary market platforms, pre-IPO investment funds, and broker-dealer platforms that facilitate private company transactions. TechStackIPO's marketplace tracks available access options. Note: pre-IPO investments carry higher risk and limited liquidity compared to public market investing.

What is Weights & Biases's IPO Readiness Score? +

Weights & Biases scores 77/100 (Grade: B) on TechStackIPO's IPO Readiness Index. The score evaluates funding scale, valuation trajectory, funding momentum, stage progression, and company maturity. Scores above 70 indicate strong near-term IPO potential.

How much total funding has Weights & Biases raised? +

Weights & Biases has raised $850M in total venture capital and private equity funding, with backing from NEA, Insight Partners, NVIDIA.

Who are Weights & Biases's key investors? +

Weights & Biases's notable investors include NEA, Insight Partners, NVIDIA, Coatue, Felicis Ventures. Full investor details, funding round history, and lead investor breakdowns are available on TechStackIPO.

What sector is Weights & Biases in? +

Weights & Biases is a Artificial Intelligence company. Weights & Biases (W&B) is the machine learning experimentation platform enabling data scientists to track experiments, e.

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