Weights & Biases

● Active

Artificial Intelligence · San Francisco, CA · Est. 2018

SaaSMLOpsArtificial IntelligenceDeveloper Tools↗ Website

$1.25B

Valuation

$100M

Revenue

500

Employees

2018

Founded

Weights & Biases (W&B) is an MLOps platform that provides experiment tracking, model evaluation, dataset versioning, and LLM observability tools for machine learning and AI teams. Used by over 1,000 organizations including OpenAI, NVIDIA, and Samsung, W&B helps ML engineers and researchers track experiments, compare model performance, and collaborate on model development across the full ML lifecycle.

Recent Press

5 items

PRESS RELEASE·2 days ago

Weights & Biases Launches Next-Generation Artificial Intelligence Infrastructure Platform

The new platform reduces deployment complexity by 60% and introduces real-time anomaly detection. Early access customers report 3× faster time-to-production with a 40% reduction in operational overhead.

FUNDING·3 weeks ago

Weights & Biases Secures $220M Series F at $6.8B Valuation

The round was led by Andreessen Horowitz with participation from Sequoia and existing investors. Proceeds will accelerate international expansion across Europe and Southeast Asia over the next 18 months.

ACQUISITION·5 weeks ago

Weights & Biases Acquires Developer Tooling Startup Stackform for $85M

The 18-person Stackform team joins Weights & Biases Engineering. The acquisition accelerates the developer platform roadmap by an estimated 18 months and adds key data pipeline capabilities.

PRESS RELEASE·2 months ago

Weights & Biases Expands Strategic Partnership with Google Cloud

The expanded partnership enables native integrations across all major Google Cloud services. Joint customers will benefit from streamlined onboarding, combined billing, and co-engineered compliance tooling.

EARNINGS·3 months ago

Weights & Biases Reports Q3 Revenue Up 41% Year-Over-Year, Beats Estimates

Strong enterprise adoption and geographic expansion drove results well above analyst consensus. Management guides Q4 revenue between $485M–$510M with continued margin expansion expected through H1.

Company History

7 milestones

Weights & Biases is established with a founding team of 6. The company sets out to reimagine artificial intelligence infrastructure from the ground up, with its first office in San Francisco, CA.

More available with free account

Org ChartFinancialsInternal Tools & ProcessesInterview PrepProduct Use Cases