Fireworks AI vs Nebius AI Cloud: who uses which
Customers, public proof and the companies that use both.
On usedby, 29 companies use Fireworks AI and 48 use Nebius AI Cloud. 3 companies use both, including Cognition, Cursor, and Lightfern. Fireworks AI leads among the DevTools & Infrastructure companies on usedby that use either tool.Latest check Oct 7, 2026: 77 of 77 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 Fireworks AI, Nebius AI Cloud, or both
Every company with a public proof for at least one of the two tools.
26
use only Fireworks AI
3
companies use both
45
use only Nebius AI Cloud
26 companies use only Fireworks AI, 45 use only Nebius AI Cloud and 3 use both, out of the 74 companies on usedby that use at least one of them.
Where it lands
Newest customers
No new customer since tracking started on October 5, 2026.
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 |
|---|
 Cognition |
 Cursor |
 Lightfern |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use Fireworks AI, Nebius AI Cloud or both: a share of the companies on usedby, not of the market.
Fireworks AI onlyBothNebius AI Cloud only
More common with Fireworks AI
- DevTools & Infrastructure6 of the 6 DevTools & Infrastructure companies on usedby that use either tool use Fireworks AI, 1 of them alongside Nebius AI Cloud.
- Artificial Intelligence3 of the 5 Artificial Intelligence companies on usedby that use either tool use Fireworks AI.
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.
Fireworks AI
Nebius AI CloudWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Fireworks AI
No reviewed story for Fireworks AI yet.
Nebius AI Cloud
TrialHub reduces the time spent on feasibility assessments by 50%
TrialHub
Vendor case study, nebius.com, captured Oct 7, 2026
a single H100 GPU completed the training process 50–80% faster than the A100 GPU
Krisp
Vendor case study, nebius.com, captured Oct 7, 2026
Questions about Fireworks AI and Nebius AI Cloud
Which is used more, Fireworks AI or Nebius AI Cloud?
Nebius AI Cloud has more customers on usedby: 48 against 29 for Fireworks AI.
Do companies use both Fireworks AI and Nebius AI Cloud?
Yes. 3 companies use both on usedby, including Cognition, Cursor, and Lightfern.
Who uses Fireworks AI?
29 companies on usedby, each with the public page that shows it. See who uses Fireworks AI.
Who uses Nebius AI Cloud?
48 companies on usedby, each with the public page that shows it. See who uses Nebius AI Cloud.
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.