# Speech & voice APIs tools used by Artificial Intelligence companies

usedby lists 33 Artificial Intelligence companies using 5 Speech & voice APIs tools. The most used is AssemblyAI: 10 of the 33 Artificial Intelligence companies on usedby, every proof level counted. These are counts of the companies usedby tracks, not a market share. Data as of 2026-10-24.

## Ranking

Tools ranked by the companies of the 33 Artificial Intelligence companies on usedby that use them. Each company counts once per tool, at its strongest proof. Ties go to more confirmed, then declared, then observed companies.

| # | Tool | Companies | Confirmed | Declared | Observed | Job posts only | Last check |
|---|---|---|---|---|---|---|---|
| 1 | [AssemblyAI](https://www.usedby.ai/tools/assembly-ai.md) | 10 | 5 | 0 | 5 | 0 | 2026-10-21 |
| 2 | [Cartesia](https://www.usedby.ai/tools/cartesia.md) | 9 | 6 | 0 | 3 | 0 | 2026-10-18 |
| 3 | [Deepgram](https://www.usedby.ai/tools/deepgram.md) | 9 | 5 | 0 | 4 | 0 | 2026-10-19 |
| 4 | [LiveKit](https://www.usedby.ai/tools/livekit.md) | 4 | 0 | 0 | 4 | 0 | 2026-10-18 |
| 5 | [Recall.ai](https://www.usedby.ai/tools/recall.md) | 2 | 1 | 0 | 1 | 0 | 2026-10-24 |

## Customers per tool

Every line is a customer, at one of three proof levels: confirmed (a case study, a named quote, a press release, or the company's own public account of using the tool (its own site, or a post by one of its executives, VP or above)), observed (the vendor shows the company on its own pages) or signal (a job post shows the company's employees use the tool, the weakest proof). A line the company declared to usedby itself is marked declared. A signal is never a case study or a vendor listing. Strongest proof first. "Last check" is the later of the line's re-verification and its latest capture.

| Tool | Company | Proof | Source | Last check |
|---|---|---|---|---|
| AssemblyAI | [Ollang](https://www.usedby.ai/companies/ollang.md) | Confirmed | [assemblyai.com](https://www.assemblyai.com/customers/ollang-customer-story), captured 2026-10-02 | 2026-10-21 |
| AssemblyAI | [Delphi](https://www.usedby.ai/companies/delphi.md) | Confirmed | [assemblyai.com](https://www.assemblyai.com/customers/delphi-customer-story), captured 2026-10-08 | 2026-10-21 |
| AssemblyAI | [Dexa](https://www.usedby.ai/companies/dexa.md) | Confirmed | [assemblyai.com](https://www.assemblyai.com/customers/dexa-customer-story), captured 2026-10-08 | 2026-10-21 |
| AssemblyAI | [EchoAI](https://www.usedby.ai/companies/echoai.md) | Confirmed | [assemblyai.com](https://www.assemblyai.com/customers/echoai-customer-story), captured 2026-10-08 | 2026-10-21 |
| AssemblyAI | [Siro](https://www.usedby.ai/companies/siro.md) | Confirmed | [assemblyai.com](https://www.assemblyai.com/customers/siro-customer-story), captured 2026-10-21 | 2026-10-21 |
| AssemblyAI | [Cassidy](https://www.usedby.ai/companies/cassidy.md) | Observed | [assemblyai.com](https://www.assemblyai.com/customers), captured 2026-10-21 | 2026-10-21 |
| AssemblyAI | [Jump](https://www.usedby.ai/companies/jump.md) | Observed | [assemblyai.com](https://www.assemblyai.com/customers), captured 2026-10-21 | 2026-10-21 |
| AssemblyAI | [Smith.ai](https://www.usedby.ai/companies/smith-ai.md) | Observed | [assemblyai.com](https://www.assemblyai.com/customers), captured 2026-10-21 | 2026-10-21 |
| AssemblyAI | [Wave.co](https://www.usedby.ai/companies/wave-co.md) | Observed | [assemblyai.com](https://www.assemblyai.com/customers), captured 2026-10-21 | 2026-10-21 |
| AssemblyAI | [HappyScribe](https://www.usedby.ai/companies/happyscribe.md) | Observed | [assemblyai.com](https://www.assemblyai.com/customers), captured 2026-10-10 | 2026-10-10 |
| Cartesia | [2X Solutions](https://www.usedby.ai/companies/2x-solutions.md) | Confirmed | [cartesia.ai](https://www.cartesia.ai/customers/2x-solutions), captured 2026-10-08 | 2026-10-18 |
| Cartesia | [AimAI](https://www.usedby.ai/companies/aimai.md) | Confirmed | [cartesia.ai](https://www.cartesia.ai/customers/aimai), captured 2026-10-08 | 2026-10-18 |
| Cartesia | [Captions](https://www.usedby.ai/companies/captions.md) | Confirmed | [cartesia.ai](https://www.cartesia.ai/customers/captions), captured 2026-10-08 | 2026-10-18 |
| Cartesia | [Speko](https://www.usedby.ai/companies/speko.md) | Confirmed | [cartesia.ai](https://www.cartesia.ai/customers/speko), captured 2026-10-08 | 2026-10-18 |
| Cartesia | [Thoughtly](https://www.usedby.ai/companies/thoughtly.md) | Confirmed | [cartesia.ai](https://www.cartesia.ai/customers/thoughtly), captured 2026-10-08 | 2026-10-18 |
| Cartesia | [toby](https://www.usedby.ai/companies/toby.md) | Confirmed | [cartesia.ai](https://www.cartesia.ai/customers/toby), captured 2026-10-08 | 2026-10-18 |
| Cartesia | [ActOnCue](https://www.usedby.ai/companies/actoncue.md) | Observed | [cartesia.ai](https://www.cartesia.ai/customers), captured 2026-10-18 | 2026-10-18 |
| Cartesia | [Blue Machines](https://www.usedby.ai/companies/blue-machines.md) | Observed | [cartesia.ai](https://www.cartesia.ai/customers), captured 2026-10-18 | 2026-10-18 |
| Cartesia | [Bolna](https://www.usedby.ai/companies/bolna.md) | Observed | [cartesia.ai](https://www.cartesia.ai/customers), captured 2026-10-18 | 2026-10-18 |
| Deepgram | [Flowtica](https://www.usedby.ai/companies/flowtica.md) | Confirmed | [deepgram.com](https://deepgram.com/customers/flowtica), captured 2026-10-02 | 2026-10-19 |
| Deepgram | [GetVocal AI](https://www.usedby.ai/companies/getvocal-ai.md) | Confirmed | [deepgram.com](https://deepgram.com/customers/getvocal-scales-governed-enterprise-voice-automation), captured 2026-10-02 | 2026-10-19 |
| Deepgram | [Prem AI](https://www.usedby.ai/companies/prem-ai.md) | Confirmed | [deepgram.com](https://deepgram.com/customers/prem-ai), captured 2026-10-02 | 2026-10-19 |
| Deepgram | [SigmaMind AI](https://www.usedby.ai/companies/sigmamind-ai.md) | Confirmed | [deepgram.com](https://deepgram.com/customers/sigmamind-ai), captured 2026-10-09 | 2026-10-19 |
| Deepgram | [Creovai](https://www.usedby.ai/companies/creovai.md) | Confirmed | [deepgram.com](https://deepgram.com/customers/creovai), captured 2026-10-09 | 2026-10-19 |
| Deepgram | [Coval](https://www.usedby.ai/companies/coval.md) | Observed | [deepgram.com](https://deepgram.com/), captured 2026-10-19 | 2026-10-19 |
| Deepgram | [Prosper AI](https://www.usedby.ai/companies/prosper-ai.md) | Observed | [deepgram.com](https://deepgram.com/customers), captured 2026-10-19 | 2026-10-19 |
| Deepgram | [Elerian AI](https://www.usedby.ai/companies/elerian-ai.md) | Observed | [deepgram.com](https://deepgram.com/customers), captured 2026-10-19 | 2026-10-19 |
| Deepgram | [Phonely](https://www.usedby.ai/companies/phonely.md) | Observed | [deepgram.com](https://deepgram.com/customers) | Not dated |
| LiveKit | [Micro 1](https://www.usedby.ai/companies/micro-1.md) | Observed | [livekit.com](https://livekit.com/customers), captured 2026-10-18 | 2026-10-18 |
| LiveKit | [Portola](https://www.usedby.ai/companies/portola.md) | Observed | [livekit.com](https://livekit.com/customers), captured 2026-10-18 | 2026-10-18 |
| LiveKit | [SpeakAI](https://www.usedby.ai/companies/speakai.md) | Observed | [livekit.com](https://livekit.com/customers), captured 2026-10-18 | 2026-10-18 |
| LiveKit | [Ultravox](https://www.usedby.ai/companies/ultravox.md) | Observed | [livekit.com](https://livekit.com/customers), captured 2026-10-18 | 2026-10-18 |
| Recall.ai | [timeOS](https://www.usedby.ai/companies/timeos.md) | Confirmed | [recall.ai](https://www.recall.ai/customers/timeos), captured 2026-10-08 | 2026-10-24 |
| Recall.ai | [Jump](https://www.usedby.ai/companies/jump.md) | Observed | [recall.ai](https://www.recall.ai/), captured 2026-10-18 | 2026-10-18 |

## Method

Public customer lines of active Speech & voice APIs tools at companies classified in Artificial Intelligence. 26 companies that sell software were left out, so a vendor is never counted as a user. Company mix by strongest proof: 17 confirmed, 0 declared, 16 observed and 0 signals.

## Questions

### Which Speech & voice APIs tools do Artificial Intelligence companies use most?

AssemblyAI leads: 10 of the 33 Artificial Intelligence companies on usedby that use Speech & voice APIs tools use it. Next: Cartesia (9), Deepgram (9), LiveKit (4), and Recall.ai (2).

### How many Artificial Intelligence companies use Speech & voice APIs tools?

33 Artificial Intelligence companies on usedby use at least one of 5 Speech & voice APIs tools. It counts the companies usedby tracks.

### What proof backs these lines?

Of the 33 companies, each counted at its strongest proof: 17 confirmed, 0 declared, 16 observed and 0 known from a job post.

### How does usedby build this ranking?

usedby counts each Artificial Intelligence company once per tool, from public proof: case studies, press releases, the company's own site or its declaration to usedby, vendor customer pages and job posts. 26 software vendors are left out. Every line shows its proof and the date usedby last checked it.

Industry page: https://www.usedby.ai/companies/industry/artificial-intelligence.md · Category page: https://www.usedby.ai/tools/category/speech-audio-api.md

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Source: https://www.usedby.ai/companies/industry/artificial-intelligence/speech-audio-api · How we check: https://www.usedby.ai/methodology