Claude vs TypeSafe AI: who uses which
Customers, public proof and the companies that use both.
On usedby, 182 companies use Claude and 3 use TypeSafe AI. 1 company uses both, including Linear. Claude leads among the DevTools & Infrastructure companies on usedby that use either tool.Latest check Nov 4, 2026: 158 of 185 public lines checked. Counts include every proof level, job-post signals included. A company on both tools counts at any proof level, and a job post on one side is marked as such.
Who uses Claude, TypeSafe AI, or both
Every company with a public proof for at least one of the two tools.
181
listed for Claude only
1
company uses both
1 of them is listed through a job post on one side, the weakest proof.
2
listed for TypeSafe AI only
On usedby, 181 companies are listed for Claude only, 2 are listed for TypeSafe AI only and 1 uses both, 1 of them through a job post on one side, out of the 184 companies listed for at least one. An absent listing does not prove non-use.
Where it lands
Recently publicly listed customers
No new public customer listing since tracking started on October 2, 2026.
Who uses both
Companies with a public line on both tools, at any proof level: the strongest proofs come first, and a job post is marked.
| Company | First public proof, Claude | First public proof, TypeSafe AI |
|---|---|---|
 Linearjob post for Claude | Job post, Oct 2026 | On or before Nov 2026 |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use Claude, TypeSafe AI or both: a share of the companies on usedby, not of the market.
Listed for Claude onlyBothListed for TypeSafe AI only
More common with Claude
- DevTools & Infrastructure28 of the 28 DevTools & Infrastructure companies on usedby that use either tool use Claude, 1 of them alongside TypeSafe AI.
- Artificial Intelligence27 of the 27 Artificial Intelligence companies on usedby that use either tool use Claude.
- Fintech & Payments18 of the 18 Fintech & Payments companies on usedby that use either tool use Claude.
Source: every usedby line, from confirmed proofs to job-post signals (the weakest proof level).
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Vendor facts checked: Claude, 4 of 4; TypeSafe AI, 2 of 4. Missing facts remain unverified, not absent features.
Claude
TypeSafe AIWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Claude
Cuts the time to complete an agreement 10x, from roughly 10 hours of lawyer work to about one
Spellbook
Vendor case study, claude.com, captured Oct 30, 2026
Gave around 700 people access to Claude Code and Claude Cowork to date
Pictet
Vendor case study, claude.com, captured Oct 30, 2026
TypeSafe AI
with 88% lower cost and roughly 50% faster task completion time
Jack & Jill
Vendor case study, typesafe.ai, captured Oct 27, 2026
Questions about Claude and TypeSafe AI
Which is used more, Claude or TypeSafe AI?
Claude has more customers on usedby: 182 against 3 for TypeSafe AI.
Do companies use both Claude and TypeSafe AI?
Yes. 1 company uses both on usedby, including Linear.
Who uses Claude?
182 companies on usedby, each with the public page that shows it. See who uses Claude.
Who uses TypeSafe AI?
3 companies on usedby, each with the public page that shows it. See who uses TypeSafe 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 four proof levels: confirmed, declared by the company itself, observed or signal (a job post, the weakest). A company counts as using both tools when it has a line on each, at any level; the list shows the strongest proofs first and marks job posts.