Fathom vs Grain: who uses which
Customers, public proof and the companies that use both.
On usedby, 10 companies use Fathom and 30 use Grain. 2 companies use both, including Adobe and Zapier. Grain leads among the Marketing Tech companies on usedby that use either tool.Latest check Oct 7, 2026: 36 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 Fathom, Grain, or both
Every company with a public proof for at least one of the two tools.
8
use only Fathom
2
companies use both
28
use only Grain
8 companies use only Fathom, 28 use only Grain 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 7, 2026.
Who uses both
Companies with a confirmed or observed line on both tools.
| Company |
|---|
 Adobe |
 Zapier |
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Fathom
GrainWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Questions about Fathom and Grain
Which is used more, Fathom or Grain?
Grain has more customers on usedby: 30 against 10 for Fathom.
Do companies use both Fathom and Grain?
Yes. 2 companies use both on usedby, including Adobe and Zapier.
Who uses Fathom?
10 companies on usedby, each with the public page that shows it. See who uses Fathom.
Who uses Grain?
30 companies on usedby, each with the public page that shows it. See who uses Grain.
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.