On usedby, 26 companies use Guru and 14 use Onyx. 2 companies use both, including Brex and Ramp. Guru leads among the Fintech & Payments companies on usedby that use either tool.Latest check Oct 5, 2026: 38 of 40 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 Guru, Onyx, or both
Every company with a public proof for at least one of the two tools.
24
use only Guru
2
companies use both
12
use only Onyx
24 companies use only Guru, 12 use only Onyx and 2 use both, out of the 38 companies on usedby that use at least one of them.
Where it lands
Newest customers
No new customer since tracking started on October 3, 2026.
Where it lands
Newest customers
No new customer since tracking started on October 3, 2026.
Who uses both
Companies with a confirmed or observed line on both tools.
| Company |
|---|
 Brex |
 Ramp |
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Guru
OnyxWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Questions about Guru and Onyx
Which is used more, Guru or Onyx?
Guru has more customers on usedby: 26 against 14 for Onyx.
Do companies use both Guru and Onyx?
Yes. 2 companies use both on usedby, including Brex and Ramp.
Who uses Guru?
26 companies on usedby, each with the public page that shows it. See who uses Guru.
Who uses Onyx?
14 companies on usedby, each with the public page that shows it. See who uses Onyx.
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.