On usedby, 11 companies use Otter and 18 use Tana. 1 company uses both, including Amazon.Latest check Oct 8, 2026: 29 of 29 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 Otter, Tana, or both
Every company with a public proof for at least one of the two tools.
10
use only Otter
1
company uses both
17
use only Tana
10 companies use only Otter, 17 use only Tana and 1 uses both, out of the 28 companies on usedby that use at least one of them.
Who uses both
Companies with a confirmed or observed line on both tools.
| Company |
|---|
 Amazon |
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Otter
TanaWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Questions about Otter and Tana
Which is used more, Otter or Tana?
Tana has more customers on usedby: 18 against 11 for Otter.
Do companies use both Otter and Tana?
Yes. 1 company uses both on usedby, including Amazon.
Who uses Otter?
11 companies on usedby, each with the public page that shows it. See who uses Otter.
Who uses Tana?
18 companies on usedby, each with the public page that shows it. See who uses Tana.
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.