# Scale AI vs Weights & Biases: who uses which

On usedby, 16 companies use Scale AI and 55 use Weights & Biases. 2 companies use both, including Meta and Microsoft. Counts include every proof level, job-post signals included. Companies named on both have a confirmed or observed line on each side. Latest check 2026-10-03: 61 of 71 public lines checked.

## Side by side

|  | [Scale AI](https://www.usedby.ai/tools/scale-ai.md) | [Weights & Biases](https://www.usedby.ai/tools/weights-and-biases.md) |
|---|---|---|
| Public customers | 16 | 55 |
| Confirmed | 1 | 43 |
| Observed | 15 | 12 |
| Signals (job posts) | 0 | 0 |
| Top industries of customers | Artificial Intelligence (3), Investment & VC (2), Media & Publishing (2) | Artificial Intelligence (8), Automotive Manufacturing (2), Biotech & Pharma (2) |
| Category | ML Ops & Training | ML Ops & Training |
| Security | SOC 2 Type II ([scale.com](https://scale.com/security), checked 2026-10-07) | — |
| Data processing terms | A data processing agreement is available. ([scale.com](https://scale.com/legal/privacy), checked 2026-10-07) | — |
| Vendor status | — | Renamed CoreWeave Forge; its website now redirects to coreweave.com. ([id.coreweave.com](https://id.coreweave.com/login?next=%2Fwandb), checked 2026-10-04) |

## Companies named on both

Confirmed or observed on each side. The first public proof is not an adoption date.

| Company | First public proof, Weights & Biases |
|---|---|
| [Meta](https://www.usedby.ai/companies/meta.md) | On or before September 2025 |
| [Microsoft](https://www.usedby.ai/companies/microsoft.md) | On or before October 2023 |

## Published results

Reviewed stories only; usedby did not measure the figures.

- Weights & Biases: [Woven by Toyota](https://www.usedby.ai/case-studies/woven-by-toyota-weights-and-biases.md): **10x**: “Experiment tracking has given us 10x velocity” (published 2024-02-20)
- Weights & Biases: [ReelData](https://www.usedby.ai/case-studies/reeldata-weights-and-biases.md): story without a checked figure. (published 2026-01-21)

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Source: https://www.usedby.ai/compare/scale-ai-vs-weights-and-biases · How we check: https://www.usedby.ai/methodology