Harvey vs Luminance: who uses which
Customers, public proof and the companies that use both.
On usedby, 235 companies use Harvey and 29 use Luminance. No company is listed with both yet. Harvey leads among the Legal & Compliance companies on usedby that use either tool.Latest check Oct 7, 2026: 233 of 264 public lines checked. Counts include every proof level, job-post signals included. Companies named on both have a confirmed or observed line on each side.
Who uses Harvey, Luminance, or both
Every company with a public proof for at least one of the two tools.
234
use only Harvey
0
companies use both
28
use only Luminance
234 companies use only Harvey, 28 use only Luminance and 0 use both, out of the 263 companies on usedby that use at least one of them.
1 more company is listed for both, with a job post on one side: not counted as using both.
Where it lands
Newest customers
Where it lands
Newest customers
No new customer since tracking started on October 7, 2026.
Who uses both
Companies with a confirmed or observed line on both tools.
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use Harvey, Luminance or both: a share of the companies on usedby, not of the market.
Harvey onlyBothLuminance only
More common with Harvey
- Legal & Compliance139 of the 140 Legal & Compliance companies on usedby that use either tool use Harvey.
- Investment & VC12 of the 12 Investment & VC companies on usedby that use either tool use Harvey.
- Manufacturing9 of the 11 Manufacturing companies on usedby that use either tool use Harvey.
Source: confirmed and observed usedby lines. Job-post signals, the weakest proof level, are left out of these shares.
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Harvey
LuminanceWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Harvey
Roughly 95% of training is delivered in-house
Blank Rome
Vendor case study, harvey.ai, published Aug 6, 2026
saving an estimated 4 to 10 hours per week per lawyer
Dentsu
Vendor case study, harvey.ai, published May 6, 2026
Luminance
40% time-savings on administrative tasks per week
ProSapient
Vendor case study, luminance.com, captured Oct 7, 2026
reduced the time spent on reviews by over 30% per contract
LG Chem
Vendor case study, luminance.com, captured Oct 7, 2026
Questions about Harvey and Luminance
Which is used more, Harvey or Luminance?
Harvey has more customers on usedby: 235 against 29 for Luminance.
Do companies use both Harvey and Luminance?
usedby has not found a company with a confirmed or observed line on both Harvey and Luminance yet.
Who uses Harvey?
235 companies on usedby, each with the public page that shows it. See who uses Harvey.
Who uses Luminance?
29 companies on usedby, each with the public page that shows it. See who uses Luminance.
How does usedby count customers?
A company counts when a public page shows it: a vendor's customer page, a case study, a press release or a job post, most saved with a dated capture. Every line is a customer, at one of three proof levels: confirmed, observed or signal (a job post, the weakest). A company is named as using both tools when its lines on both are confirmed or observed.