Fathom vs Read AI: who uses which
Customers, public proof and the companies that use both.
On usedby, 10 companies use Fathom and 15 use Read AI. 1 company uses both, including Hubspot. Read AI leads among the Schools & Universities companies on usedby that use either tool.Latest check Oct 7, 2026: 21 of 25 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 Fathom, Read AI, or both
Every company with a public proof for at least one of the two tools.
9
use only Fathom
1
company uses both
14
use only Read AI
9 companies use only Fathom, 14 use only Read AI and 1 uses both, out of the 24 companies on usedby that use at least one of them.
Who uses both
Companies with a confirmed or observed line on both tools.
| Company |
|---|
 Hubspot |
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Fathom
Read AIWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Questions about Fathom and Read AI
Which is used more, Fathom or Read AI?
Read AI has more customers on usedby: 15 against 10 for Fathom.
Do companies use both Fathom and Read AI?
Yes. 1 company uses both on usedby, including Hubspot.
Who uses Fathom?
10 companies on usedby, each with the public page that shows it. See who uses Fathom.
Who uses Read AI?
15 companies on usedby, each with the public page that shows it. See who uses Read AI.
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.