Cerebras vs Fireworks AI: who uses which
Customers, public proof and the companies that use both.
On usedby, 32 companies use Cerebras and 29 use Fireworks AI. 5 companies use both, including Notion, Quora, and Cognition. Cerebras leads among the Artificial Intelligence companies on usedby that use either tool, Fireworks AI among the DevTools & Infrastructure companies.Latest check Oct 7, 2026: 61 of 61 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 Cerebras, Fireworks AI, or both
Every company with a public proof for at least one of the two tools.
27
use only Cerebras
5
companies use both
24
use only Fireworks AI
27 companies use only Cerebras, 24 use only Fireworks AI and 5 use both, out of the 56 companies on usedby that use at least one of them.
Where it lands
Newest customers
No new customer since tracking started on October 7, 2026.
Where it lands
Newest customers
No new customer since tracking started on October 5, 2026.
Who uses both
Companies with a confirmed or observed line on both tools.
| Company |
|---|
 Notion |
 Quora |
 Cognition |
 NinjaTech AI |
 Lovable |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use Cerebras, Fireworks AI or both: a share of the companies on usedby, not of the market.
Cerebras onlyBothFireworks AI only
More common with Cerebras
- Artificial Intelligence8 of the 9 Artificial Intelligence companies on usedby that use either tool use Cerebras, 2 of them alongside Fireworks AI.
More common with Fireworks AI
- DevTools & Infrastructure6 of the 7 DevTools & Infrastructure companies on usedby that use either tool use Fireworks AI, 1 of them alongside Cerebras.
Source: confirmed and observed usedby lines. Job-post signals, the weakest proof level, are left out of these shares.
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
CerebrasFireworks AIWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Questions about Cerebras and Fireworks AI
Which is used more, Cerebras or Fireworks AI?
Cerebras has more customers on usedby: 32 against 29 for Fireworks AI. Cerebras leads among the Artificial Intelligence companies on usedby that use either tool, Fireworks AI among the DevTools & Infrastructure companies.
Do companies use both Cerebras and Fireworks AI?
Yes. 5 companies use both on usedby, including Notion, Quora, and Cognition.
Who uses Cerebras?
32 companies on usedby, each with the public page that shows it. See who uses Cerebras.
Who uses Fireworks AI?
29 companies on usedby, each with the public page that shows it. See who uses Fireworks 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.