Company

Weights & Biases

ML experiment tracking and model management platform widely used by robotics teams to track RL training runs, sim-to-real experiments, and model deployment.

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Founded: 2017
HQ: San Francisco, CA, USA
Status: private

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Key facts

Headquarters

San Francisco, CA, USA

Founded

2017

Status

private

Type

brain

Founded

2017, San Francisco CA

Founders

Lukas Biewald (CEO, ex-Figure Eight), Chris Van Pelt (Distinguished Engineer, ex-Figure Eight), Shawn Lewis

Fundingsee investors →

$250M over 5 rounds. Series C $135M at $1B valuation (2022). Strategic $50M at $1.25B (Aug 2023, Nat Friedman + Daniel Gross lead).

Acquired

Acquired by CoreWeave (NASDAQ: CRWV) for ~$1.7B in May 2025

Products

W&B Experiment Tracking, W&B Models (registry), W&B Weave (LLM observability, GA 2024), W&B Prompts (LLMOps, Aug 2023)

Customers

OpenAI, Meta, NVIDIA, Cohere, Hugging Face, Stability AI. ~$50M ARR, 1M+ developers, 700K+ users

Partnerships

AWS (Partner Award finalist 2024), Microsoft (Partner of the Year finalist 2024), NVIDIA NIM, NTT DATA, LG CNS, DoD Defense Innovation Unit

Robotics Applications

Dedicated robotics webinar for tracking RL training dynamics; used by robotics/autonomous systems teams for experiment tracking in simulation pipelines

Security

UpGuard rating 795/950. Cranium AI partnership for AI safety (May 2026). NDA-based vulnerability disclosure program.

Data & sources

Press releases

1 source backing this record.View all →

Weights & Biases on the deployment map

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Weights & Biases has no verified deployments on the DEPLOY registry yet. Explore the deployment map by place and type.

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No verified deployments for Weights & Biases on the DEPLOY record yet. Track Weights & Biases to know the moment the first one is verified.

Relationships

DDaniel GrossInvestor BBONDInvestor

Current leadership (3)

Lukas Biewald Co-founder & CEOsecondary-verified
Chris Van Pelt Co-founder & Distinguished Engineersecondary-verified
Shawn Lewis Co-foundersecondary-verified

Safety record

No incidents on record for Weights & Biases.

Only active incidents are counted. Retracted incidents are excluded from this summary but remain reachable at their canonical URLs.

Full safety record: incidents, sourcing, and exposure data →

Financial state

Reporting basis: aggregator_estimate
Lifecycle stage: early
Counterparty risk class: unknown

Each numeric field carries its own basis marker. Aggregators report a number; this surface preserves the source class so verification depth travels with the value.

Funding rounds (2)

Funding by round

Weights & Biases’s 2 disclosed rounds, $185M in total, oldest to newest.

Series C2022-01$135M

Strategic2023-08$50M

Strategic2023-08-01
$50M(reported)
Investors: Daniel Gross (lead)
Series C2022-01-01
$135M(reported)
Investors: BOND (co_lead)

See the full valuations ranking →

Recent activity

Every change to this record is dated, sourced, and independently verified where marked.

Record createdAug 9, 2026
Added to the verified registry

Full change history →

Sources (1)

https://wandb.ai

Common questions

What is Weights & Biases?

ML experiment tracking and model management platform widely used by robotics teams to track RL training runs, sim-to-real experiments, and model deployment.

What does Weights & Biases make?

Weights & Biases has no robot models recorded on the DEPLOY registry. Weights & Biases builds robot foundation models or autonomy software.

Is Weights & Biases publicly traded?

Weights & Biases is not independently listed on public markets; it is part of CoreWeave (NASDAQ: CRWV on the DEPLOY registry.

Who is the CEO of Weights & Biases?

Lukas Biewald is the ceo of Weights & Biases, per the DEPLOY registry.

How can I invest in Weights & Biases?

Weights & Biases has no separately traded stock; it is owned by CoreWeave (NASDAQ: CRWV (the parent is the entity that trades, where it is public).

Where is Weights & Biases headquartered?

Weights & Biases is headquartered in San Francisco, CA, USA.

Who owns Weights & Biases?

Weights & Biases is owned by CoreWeave (NASDAQ: CRWV, per the DEPLOY registry.

Is Weights & Biases a top robotics company?

On DEPLOY's intelligence score, which blends verified deployments, funding, hiring, media, safety, and IP signals, Weights & Biases ranks in roughly the top 64% of companies tracked by the registry.

When was Weights & Biases founded?

Weights & Biases was founded in 2017.

Is Weights & Biases safe?

Weights & Biases has no incidents on record in the DEPLOY registry. This does not constitute a safety guarantee; it reflects the incidents DEPLOY has tracked and verified to date.

Methodology: Verified · 1 source (1 primary) · last reviewed 2026-08-21

Verification posture

Verified

High confidence

Review state

Stable

Last reviewed 2026-08-21

Sources by quality tier

1: primary-company-ir; Company IR disclosure

The framework is documented at /methodology. Corrections at /corrections. Reviewer: DEPLOY editorial team.