Cartesia vs Fish Audio: who uses which
Customers, public proof and the companies that use both.
On usedby, 43 companies use Cartesia and 22 use Fish Audio. 4 companies use both, including Runway, LiveKit, and Sanas. Cartesia leads among the Artificial Intelligence companies on usedby that use either tool.Latest check Nov 13, 2026: 65 of 65 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 Cartesia, Fish Audio, or both
Every company with a public proof for at least one of the two tools.
39
listed for Cartesia only
4
companies use both
18
listed for Fish Audio only
On usedby, 39 companies are listed for Cartesia only, 18 are listed for Fish Audio only and 4 use both, out of the 61 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, Cartesia | First public proof, Fish Audio |
|---|---|---|
 Runway | On or before Nov 2026 | On or before Nov 2026 |
 LiveKit | On or before Dec 2024 | — |
 Sanas | On or before Jun 2026 | — |
 Retell AI | On or before Nov 2025 | — |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use Cartesia, Fish Audio or both: a share of the companies on usedby, not of the market.
Listed for Cartesia onlyBothListed for Fish Audio only
More common with Cartesia
- Artificial Intelligence25 of the 28 Artificial Intelligence companies on usedby that use either tool use Cartesia, 3 of them alongside Fish Audio.
- Sales Tech & CRM5 of the 5 Sales Tech & CRM companies on usedby that use either tool use Cartesia.
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: Cartesia, 3 of 5; Fish Audio, 0 of 5. Missing facts remain unverified, not absent features.
Cartesia
Fish AudioWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Cartesia
~40% reduction in engineering time previously spent on latency and quality workarounds
Bolna
Vendor case study, cartesia.ai, published Feb 10, 2026
97% faster resolutions and nearly 2x CSAT scores achieved for customers
Lorikeet
Vendor case study, cartesia.ai, published Mar 4, 2026
Fish Audio
No reviewed story for Fish Audio yet.
Questions about Cartesia and Fish Audio
Which is used more, Cartesia or Fish Audio?
Cartesia has more customers on usedby: 43 against 22 for Fish Audio.
Do companies use both Cartesia and Fish Audio?
Yes. 4 companies use both on usedby, including Runway, LiveKit, and Sanas.
Who uses Cartesia?
43 companies on usedby, each with the public page that shows it. See who uses Cartesia.
Who uses Fish Audio?
22 companies on usedby, each with the public page that shows it. See who uses Fish Audio.
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.