On usedby, 25 companies use Ivo and 24 use Sirion. 1 company uses both, including IBM.Latest check Oct 7, 2026: 49 of 49 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 Ivo, Sirion, or both
Every company with a public proof for at least one of the two tools.
24
use only Ivo
1
company uses both
23
use only Sirion
24 companies use only Ivo, 23 use only Sirion and 1 uses both, out of the 48 companies on usedby that use at least one of them.
Where it lands
Newest customers
We have not started tracking changes for Ivo yet.
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 |
|---|
 IBM |
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Ivo
SirionPricing, security and data residency are not checked yet. usedby adds them from each vendor's public pages, with the date of the check.
What customers report
Results as the vendor or the customer published them, with the source and the date.
Ivo
Cut review time from weeks to hours
Sunrider
Vendor case study, ivo.ai, captured Oct 7, 2026
Large GC and construction agreements: Saving 4–5+ hours per review
Vantage Data Centers
Vendor case study, ivo.ai, captured Oct 7, 2026
Sirion
DP World Cut Contract Cycle Time by ~80%
DP World
Vendor case study, sirion.ai, published May 30, 2026
80,000+ contracts ingested using AI-driven extraction, deduplication, and quality controls
Zalando
Vendor case study, sirion.ai, published May 31, 2026
Questions about Ivo and Sirion
Which is used more, Ivo or Sirion?
Ivo has more customers on usedby: 25 against 24 for Sirion.
Do companies use both Ivo and Sirion?
Yes. 1 company uses both on usedby, including IBM.
Who uses Ivo?
25 companies on usedby, each with the public page that shows it. See who uses Ivo.
Who uses Sirion?
24 companies on usedby, each with the public page that shows it. See who uses Sirion.
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.