AssemblyAI vs Fish Audio: who uses which
Customers, public proof and the companies that use both.
On usedby, 64 companies use AssemblyAI and 18 use Fish Audio. 4 companies use both, including HeyGen, LiveKit, and Retell AI. AssemblyAI leads among the Artificial Intelligence companies on usedby that use either tool.Latest check Nov 12, 2026: 82 of 82 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 AssemblyAI, Fish Audio, or both
Every company with a public proof for at least one of the two tools.
60
listed for AssemblyAI only
4
companies use both
14
listed for Fish Audio only
On usedby, 60 companies are listed for AssemblyAI only, 14 are listed for Fish Audio only and 4 use both, out of the 78 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, AssemblyAI | First public proof, Fish Audio |
|---|---|---|
 HeyGen | On or before Oct 2024 | — |
 LiveKit | On or before Feb 2026 | — |
 Retell AI | On or before Jul 2026 | — |
 Runway | On or before Oct 2024 | On or before Nov 2026 |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use AssemblyAI, Fish Audio or both: a share of the companies on usedby, not of the market.
Listed for AssemblyAI onlyBothListed for Fish Audio only
More common with AssemblyAI
- Artificial Intelligence21 of the 23 Artificial Intelligence companies on usedby that use either tool use AssemblyAI, 3 of them alongside Fish Audio.
- Marketing Tech6 of the 7 Marketing Tech companies on usedby that use either tool use AssemblyAI.
- Telecommunications6 of the 7 Telecommunications companies on usedby that use either tool use AssemblyAI.
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: AssemblyAI, 5 of 5; Fish Audio, 0 of 5. Missing facts remain unverified, not absent features.
AssemblyAI
Fish AudioWhat customers report
Results as the vendor or the customer published them, with the source and the date.
AssemblyAI
15% higher win rate for its customers
Jiminny
Vendor case study, assemblyai.com, captured Nov 11, 2026
Aloware has seen 50% of its client base convert to its suite of AI-powered packages
Aloware
Vendor case study, assemblyai.com, captured Nov 11, 2026
Fish Audio
No reviewed story for Fish Audio yet.
Questions about AssemblyAI and Fish Audio
Which is used more, AssemblyAI or Fish Audio?
AssemblyAI has more customers on usedby: 64 against 18 for Fish Audio.
Do companies use both AssemblyAI and Fish Audio?
Yes. 4 companies use both on usedby, including HeyGen, LiveKit, and Retell AI.
Who uses AssemblyAI?
64 companies on usedby, each with the public page that shows it. See who uses AssemblyAI.
Who uses Fish Audio?
18 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.