# Luminance vs Spellbook: who uses which

On usedby, 29 companies use Luminance and 27 use Spellbook. 1 company uses both, including LG. 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: 56 of 56 public lines checked.

## Side by side

|  | [Luminance](https://www.usedby.ai/tools/luminance.md) | [Spellbook](https://www.usedby.ai/tools/spellbook.md) |
|---|---|---|
| Public customers | 29 | 27 |
| Confirmed | 19 | 13 |
| Observed | 9 | 14 |
| Signals (job posts) | 1 | 0 |
| Top industries of customers | IT Services & System Integration (2), Manufacturing (2), Automotive Manufacturing (1) | Legal & Compliance (2), Consumer Goods (1), DevTools & Infrastructure (1) |
| Category | Legal AI | Legal AI |
| Security | SOC 2 Type II ([luminance.com](https://www.luminance.com/security), checked 2026-10-07) | SOC 2 Type II, HIPAA ([trust.spellbook.com](https://trust.spellbook.com/), checked 2026-10-08) |
| Data processing terms | A data processing agreement is available. ([luminance.com](https://www.luminance.com/legal), checked 2026-10-07) | — |
| 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.

| Company |
|---|
| [LG](https://www.usedby.ai/companies/lg.md) |

## Published results

Reviewed stories only; usedby did not measure the figures.

- Luminance: [ProSapient](https://www.usedby.ai/case-studies/prosapient-luminance.md): **40%**: “40% time-savings on administrative tasks per week” (captured by usedby 2026-10-07)
- Luminance: [LG Chem](https://www.usedby.ai/case-studies/lg-chem-luminance.md): **over 30%**: “reduced the time spent on reviews by over 30% per contract” (captured by usedby 2026-10-07)
- 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/luminance-vs-spellbook · How we check: https://www.usedby.ai/methodology