Fireworks AI vs TypeSafe AI: who uses which
Customers, public proof and the companies that use both.
On usedby, 44 companies use Fireworks AI and 3 use TypeSafe AI. 1 company uses both, including Linear. Fireworks AI leads among the DevTools & Infrastructure companies on usedby that use either tool.Latest check Nov 1, 2026: 47 of 47 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 Fireworks AI, TypeSafe AI, or both
Every company with a public proof for at least one of the two tools.
43
listed for Fireworks AI only
1
company uses both
2
listed for TypeSafe AI only
On usedby, 43 companies are listed for Fireworks AI only, 2 are listed for TypeSafe AI only and 1 uses both, out of the 46 companies listed for at least one. An absent listing does not prove non-use.
Where it lands
Recently publicly listed customers
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, Fireworks AI | First public proof, TypeSafe AI |
|---|---|---|
 Linear | On or before 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 Fireworks AI, TypeSafe AI or both: a share of the companies on usedby, not of the market.
Listed for Fireworks AI onlyBothListed for TypeSafe AI only
More common with Fireworks AI
- DevTools & Infrastructure13 of the 13 DevTools & Infrastructure companies on usedby that use either tool use Fireworks AI, 1 of them alongside TypeSafe AI.
- Artificial Intelligence9 of the 9 Artificial Intelligence companies on usedby that use either tool use Fireworks AI.
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: Fireworks AI, 1 of 2; TypeSafe AI, 2 of 2. Missing facts remain unverified, not absent features.
Fireworks AI
TypeSafe AIWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Fireworks AI
Phylo cut inference cost 60% while doubling users month-on-month
Phylo
Vendor case study, fireworks.ai, published Sep 17, 2026
Outscoring Fable 5 at ~98% lower inference cost
Paper Instruments
Vendor case study, fireworks.ai, published Oct 28, 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 Fireworks AI and TypeSafe AI
Which is used more, Fireworks AI or TypeSafe AI?
Fireworks AI has more customers on usedby: 44 against 3 for TypeSafe AI.
Do companies use both Fireworks AI and TypeSafe AI?
Yes. 1 company uses both on usedby, including Linear.
Who uses Fireworks AI?
44 companies on usedby, each with the public page that shows it. See who uses Fireworks AI.
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.