Harvey235 customers
Used by 235 companies on usedby, 139 of them in Legal & Compliance. 2 also use Spellbook. Compare Spellbook and Harvey
Source: harvey.ai, latest capture Oct 8, 2026.
Spellbook alternatives
What Spellbook customers also use, ranked by public customers.
4 of the 27 Spellbook customers on usedby also use another tool on this list. The tools most often used by the same companies are Harvey (2 shared, 235 customers in all), Ironclad (1 shared, 58 customers in all), and Luminance (1 shared, 29 customers in all).Latest check Oct 8, 2026: 644 of 679 public lines checked. Customer counts include every proof level, job-post signals included. Shared customers are counted on confirmed or observed lines on both tools.
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Spellbook customers also use another tool on this list
Harvey shares the most companies with Spellbook: 2 companies use both.
Ranked by shared customers
Tools of the same or a competing category, from another vendor, used by at least one company that also uses Spellbook. A shared customer has a confirmed or observed line on both tools.
| # | Alternative | Shared with Spellbook | Customers | Compare |
|---|---|---|---|---|
| 1 | HarveyMostly Legal & Compliance (139) | 2 | 235 | Compare Spellbook vs Harvey |
| 2 |  Ironclad | 1 | 58 | Compare Spellbook vs Ironclad |
| 3 |  Luminance | 1 | 29 | Compare Spellbook vs Luminance |
Ironclad58 customers
Used by 58 companies on usedby. 1 also uses Spellbook. Compare Spellbook and Ironclad
Source: ironcladapp.com, latest capture Oct 2, 2026.
Luminance29 customers
Used by 29 companies on usedby. 1 also uses Spellbook. Compare Spellbook and Luminance
Source: luminance.com, latest capture Oct 7, 2026.
Other Legal AI tools on usedby
Same category, with public customers, but no company named with Spellbook yet.
Switch signals
A company that left one vendor's page and appeared on another's.
No switch publishedA switch needs a departure from one vendor's page, seen on two checks in a row, and a dated arrival on another. usedby does not publish departures yet, so no switch shows here.
By industry
Which of these tools the companies on usedby use, by industry. Each row counts the companies of that industry on usedby that use at least one of these tools.
| Industry | Most used | Next | Companies |
|---|---|---|---|
| Legal & Compliance | Harvey79% |  Legora25% | 177 companies |
| Investment & VC | Harvey80% | Legora13% | 15 companies |
| Energy, Utilities & Cleantech | Harvey36% | Legora27% | 11 companies |
| Manufacturing | Harvey82% | Luminance18% | 11 companies |
| Telecommunications | Harvey55% | Ironclad9% | 11 companies |
Read the first row as: among the 177 Legal & Compliance companies on usedby that use one of these tools, 79% use Harvey. Shares can add up to more than 100% because some companies use two tools.
Questions about Spellbook alternatives
Which tool shares the most customers with Spellbook?
Harvey: 2 companies use both on usedby. Harvey has 235 customers in all. See who uses Harvey.
Do Spellbook customers use other tools too?
4 of the 27 Spellbook customers on usedby also use another tool on this list. Harvey shares the most: 2.
Which of Spellbook and its alternatives do Legal & Compliance companies on usedby use?
Among the 177 Legal & Compliance companies on usedby that use one of these tools, 79% use Harvey. Legora comes next, with 25%.
Which of Spellbook and its alternatives do Investment & VC companies on usedby use?
Among the 15 Investment & VC companies on usedby that use one of these tools, 80% use Harvey. Legora comes next, with 13%.
How does usedby rank Spellbook alternatives?
Only tools of the same or a competing category, from another vendor, count. They are ranked by shared customers: companies with a confirmed or observed line on both tools, from public pages, most with a dated capture. Tools with no shared customer are listed apart. Customer counts include every proof level, job-post signals included.