StackAI vs Tray.io: who uses which
Customers, public proof and the companies that use both.
On usedby, 21 companies use StackAI and 27 use Tray.io. No company is listed with both yet. Tray.io leads among the Marketing Tech companies on usedby that use either tool.Latest check Oct 8, 2026: 47 of 48 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 StackAI, Tray.io, or both
Every company with a public proof for at least one of the two tools.
21
use only StackAI
0
companies use both
27
use only Tray.io
21 companies use only StackAI, 27 use only Tray.io and 0 use both, out of the 48 companies on usedby that use at least one of them.
Where it lands
Newest customers
No new customer since tracking started on October 8, 2026.
Where it lands
Newest customers
No new customer since tracking started on October 5, 2026.
Who uses both
Companies with a confirmed or observed line on both tools.
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
StackAI
Tray.ioWhat customers report
Results as the vendor or the customer published them, with the source and the date.
StackAI
60% cost reduction in applicant evaluation
Nova Talent
Vendor case study, stackai.com, captured Oct 8, 2026
800+ hours saved by eliminating repetitive manual research
Varos
Vendor case study, stackai.com, captured Oct 8, 2026
Tray.io
No reviewed story for Tray.io yet.
Questions about StackAI and Tray.io
Which is used more, StackAI or Tray.io?
Tray.io has more customers on usedby: 27 against 21 for StackAI.
Do companies use both StackAI and Tray.io?
usedby has not found a company with a confirmed or observed line on both StackAI and Tray.io yet.
Who uses StackAI?
21 companies on usedby, each with the public page that shows it. See who uses StackAI.
Who uses Tray.io?
27 companies on usedby, each with the public page that shows it. See who uses Tray.io.
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.