# Harvey vs Spellbook: who uses which

On usedby, 235 companies use Harvey and 27 use Spellbook. 2 companies use both, including Herzog Fox & Neeman and KMSC Law LLP. Counts include every proof level, job-post signals included. Companies named on both have a confirmed or observed line on each side. Latest check 2026-10-08: 232 of 262 public lines checked.

## Side by side

|  | [Harvey](https://www.usedby.ai/tools/harvey.md) | [Spellbook](https://www.usedby.ai/tools/spellbook.md) |
|---|---|---|
| Public customers | 235 | 27 |
| Confirmed | 21 | 13 |
| Observed | 214 | 14 |
| Signals (job posts) | 0 | 0 |
| Top industries of customers | Legal & Compliance (139), Investment & VC (12), Manufacturing (9) | Legal & Compliance (2), Consumer Goods (1), DevTools & Infrastructure (1) |
| Category | Legal AI | Legal AI |
| Data residency | EU, Switzerland, US, Australia ([harvey.ai](https://www.harvey.ai/security), checked 2026-10-03) | — |
| Your data | Not used to train models by default. ([harvey.ai](https://www.harvey.ai/security), checked 2026-10-03) | — |
| Data processing terms | A data processing agreement is available. ([harvey.ai](https://www.harvey.ai/legal/privacy-policy), checked 2026-10-03) | — |
| Security | — | SOC 2 Type II, HIPAA ([trust.spellbook.com](https://trust.spellbook.com/), checked 2026-10-08) |
| Free trial | — | Free trial or free plan available. ([spellbook.com](https://spellbook.com/pricing), checked 2026-10-08) |
| Integrations | — | Slack, iManage, OneDrive, Dropbox, SharePoint, Google Drive ([spellbook.com](https://spellbook.com/integrations), checked 2026-10-08) |

## Companies named on both

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

| Company | First public proof, Harvey |
|---|---|
| [Herzog Fox & Neeman](https://www.usedby.ai/companies/herzog-fox-neeman.md) | On or before February 2026 |
| [KMSC Law LLP](https://www.usedby.ai/companies/kmsc-law-llp.md) | — |

## Published results

Reviewed stories only; usedby did not measure the figures.

- Harvey: [The Adecco Group](https://www.usedby.ai/case-studies/the-adecco-group-harvey.md): **eight hours**: “saving up to eight hours per week on routine work with Harvey” (published 2025-02-28)
- Harvey: [Pierson Ferdinand](https://www.usedby.ai/case-studies/pierson-ferdinand-harvey.md): **10 hours**: “At a bare minimum, every attorney saves 10 hours a week, and many report reclaiming 15 to 20.” (published 2026-07-01)
- Spellbook: [KMSC Law LLP](https://www.usedby.ai/case-studies/kmsc-law-llp-spellbook.md): **an extra hour a day**: “Spellbook probably helps me bill an extra hour a day. Maybe more.” (captured by usedby 2026-10-08)
- Spellbook: [Elevare Law](https://www.usedby.ai/case-studies/elevare-law-spellbook.md): story without a checked figure. (captured by usedby 2026-10-08)

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Source: https://www.usedby.ai/compare/harvey-vs-spellbook · How we check: https://www.usedby.ai/methodology