Ironclad vs Sirion: who uses which
Customers, public proof and the companies that use both.
On usedby, 58 companies use Ironclad and 24 use Sirion. No company is listed with both yet. Ironclad leads among the DevTools & Infrastructure companies on usedby that use either tool.Latest check Oct 7, 2026: 77 of 82 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 Ironclad, Sirion, or both
Every company with a public proof for at least one of the two tools.
58
use only Ironclad
0
companies use both
24
use only Sirion
58 companies use only Ironclad, 24 use only Sirion and 0 use both, out of the 82 companies on usedby that use at least one of them.
Where it lands
Newest customers
We have not started tracking changes for Ironclad 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.
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Ironclad
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.
Ironclad
120 users across 12 workflows
Vinted
Vendor case study, ironcladapp.com, published Sep 23, 2025
Now for complex agreements, “It’s more like 3-5 days.”
Vontier
Vendor case study, ironcladapp.com, published Jan 5, 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 Ironclad and Sirion
Which is used more, Ironclad or Sirion?
Ironclad has more customers on usedby: 58 against 24 for Sirion.
Do companies use both Ironclad and Sirion?
usedby has not found a company with a confirmed or observed line on both Ironclad and Sirion yet.
Who uses Ironclad?
58 companies on usedby, each with the public page that shows it. See who uses Ironclad.
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.