Regal vs Retell AI: who uses which
Customers, public proof and the companies that use both.
On usedby, 40 companies use Regal and 32 use Retell AI. 1 company uses both, including Varsity Tutors. Regal leads among the EdTech & E-learning companies on usedby that use either tool.Latest check Oct 8, 2026: 72 of 72 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 Regal, Retell AI, or both
Every company with a public proof for at least one of the two tools.
39
use only Regal
1
company uses both
31
use only Retell AI
39 companies use only Regal, 31 use only Retell AI and 1 uses both, out of the 71 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
We have not started tracking changes for Retell AI yet.
Who uses both
Companies with a confirmed or observed line on both tools.
| Company |
|---|
 Varsity Tutors |
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Regal
Retell AIWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Regal
HealthBird instantly saw a 250% lift in agent productivity from using their Sales Dialer.
Healthbird
Vendor case study, regal.ai, captured Oct 8, 2026
Retell AI
Call handling time reduction in data intake flows: ~3 minutes
Matic
Vendor case study, retellai.com, captured Oct 5, 2026
That’s roughly 200 hours per month we’re getting back
TripleTen
Vendor case study, retellai.com, captured Oct 5, 2026
Questions about Regal and Retell AI
Which is used more, Regal or Retell AI?
Regal has more customers on usedby: 40 against 32 for Retell AI.
Do companies use both Regal and Retell AI?
Yes. 1 company uses both on usedby, including Varsity Tutors.
Who uses Regal?
40 companies on usedby, each with the public page that shows it. See who uses Regal.
Who uses Retell AI?
32 companies on usedby, each with the public page that shows it. See who uses Retell 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.