# Speech & voice APIs tools used by Marketing & Sales companies

usedby lists 44 Marketing & Sales companies using 5 Speech & voice APIs tools. The most used is Recall.ai: 22 of the 44 Marketing & Sales companies on usedby, every proof level counted. These are counts of the companies usedby tracks, not a market share. Data as of 2026-10-25.

## Largest and best-proven users

Two labelled views of the same companies. Neither is a score.

### Largest companies

By employee range. Size known for 28 of 44.

| Company | Proof | Employees | Tools | Last check |
|---|---|---|---|---|
| [Salesforce](https://www.usedby.ai/companies/salesforce.md) | Observed | 10,001+ | LiveKit | 2026-10-25 |
| [HubSpot](https://www.usedby.ai/companies/hubspot.md) | Observed | 5,001–10,000 | Recall.ai | 2026-10-24 |
| [Podium](https://www.usedby.ai/companies/podium.md) | Observed | 1,001–5,000 | LiveKit | 2026-10-25 |

### Strongest proof

Confirmed or declared: 30 of 44. This view filters what you read, never what is counted.

| Company | Proof | Employees | Tools | Last check |
|---|---|---|---|---|
| [Cresta](https://www.usedby.ai/companies/cresta.md) | Confirmed | 201–1,000 | Deepgram, Cartesia, LiveKit | 2026-10-25 |
| [Telli](https://www.usedby.ai/companies/telli.md) | Confirmed | Unknown | Cartesia, LiveKit | 2026-10-25 |
| [BIGVU](https://www.usedby.ai/companies/bigvu.md) | Confirmed | Unknown | Deepgram | 2026-10-25 |

## Ranking

Tools ranked by the companies of the 44 Marketing & Sales 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 | [Recall.ai](https://www.usedby.ai/tools/recall.md) | 22 | 15 | 0 | 7 | 0 | 2026-10-24 |
| 2 | [AssemblyAI](https://www.usedby.ai/tools/assembly-ai.md) | 11 | 7 | 0 | 4 | 0 | 2026-10-21 |
| 3 | [Deepgram](https://www.usedby.ai/tools/deepgram.md) | 8 | 6 | 0 | 2 | 0 | 2026-10-25 |
| 4 | [Cartesia](https://www.usedby.ai/tools/cartesia.md) | 6 | 5 | 0 | 1 | 0 | 2026-10-24 |
| 5 | [LiveKit](https://www.usedby.ai/tools/livekit.md) | 5 | 0 | 0 | 5 | 0 | 2026-10-25 |

## 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, or that it lists as a sub-processor on its own legal page, 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 |
|---|---|---|---|---|
| Recall.ai | [Apollo.io](https://www.usedby.ai/companies/apolloio.md) | Confirmed | [recall.ai](https://www.recall.ai/customers/circle-medical), captured 2026-10-24 | 2026-10-24 |
| Recall.ai | [Mindtickle](https://www.usedby.ai/companies/mindtickle.md) | Confirmed | [recall.ai](https://www.recall.ai/customers/mindtickle), captured 2026-10-02 | 2026-10-24 |
| Recall.ai | [Clarify](https://www.usedby.ai/companies/clarify.md) | Confirmed | [recall.ai](https://www.recall.ai/customers/clarify), captured 2026-10-08 | 2026-10-24 |
| Recall.ai | [Mixmax](https://www.usedby.ai/companies/mixmax.md) | Confirmed | [recall.ai](https://www.recall.ai/customers/mixmax), captured 2026-10-02 | 2026-10-24 |
| Recall.ai | [SalesEQ](https://www.usedby.ai/companies/saleseq.md) | Confirmed | [recall.ai](https://www.recall.ai/customers/saleseq), captured 2026-10-08 | 2026-10-24 |
| Recall.ai | [Affinity](https://www.usedby.ai/companies/affinity.md) | Confirmed | [recall.ai](https://www.recall.ai/customers/affinity), captured 2026-10-02 | 2026-10-24 |
| Recall.ai | [Allego](https://www.usedby.ai/companies/allego.md) | Confirmed | [recall.ai](https://www.recall.ai/customers/allego), captured 2026-10-08 | 2026-10-24 |
| Recall.ai | [Grain](https://www.usedby.ai/companies/grain.md) | Confirmed | [recall.ai](https://www.recall.ai/customers/grain), captured 2026-10-08 | 2026-10-24 |
| Recall.ai | [Jiminny](https://www.usedby.ai/companies/jiminny.md) | Confirmed | [recall.ai](https://www.recall.ai/customers/jiminny), captured 2026-10-08 | 2026-10-24 |
| Recall.ai | [Modjo](https://www.usedby.ai/companies/modjo.md) | Confirmed | [recall.ai](https://www.recall.ai/customers/modjo), captured 2026-10-08 | 2026-10-24 |
| Recall.ai | [Sybill](https://www.usedby.ai/companies/sybill.md) | Confirmed | [recall.ai](https://www.recall.ai/customers/sybill), captured 2026-10-08 | 2026-10-24 |
| Recall.ai | [Verbal](https://www.usedby.ai/companies/verbal.md) | Confirmed | [recall.ai](https://www.recall.ai/customers/verbal), captured 2026-10-08 | 2026-10-24 |
| Recall.ai | [Attention](https://www.usedby.ai/companies/attention.md) | Confirmed | [recall.ai](https://www.recall.ai/customers/attention), captured 2026-10-08 | 2026-10-24 |
| Recall.ai | [HeySam](https://www.usedby.ai/companies/heysam.md) | Confirmed | [recall.ai](https://www.recall.ai/customers/heysam), captured 2026-10-08 | 2026-10-24 |
| Recall.ai | [UpdateAI](https://www.usedby.ai/companies/updateai.md) | Confirmed | [recall.ai](https://www.recall.ai/customers/updateai), captured 2026-10-08 | 2026-10-24 |
| Recall.ai | [HubSpot](https://www.usedby.ai/companies/hubspot.md) | Observed | [recall.ai](https://www.recall.ai/customers), captured 2026-10-24 | 2026-10-24 |
| Recall.ai | [Gainsight](https://www.usedby.ai/companies/gainsight.md) | Observed | [recall.ai](https://www.recall.ai/customers), captured 2026-10-24 | 2026-10-24 |
| Recall.ai | [Circleback](https://www.usedby.ai/companies/circleback.md) | Observed | [recall.ai](https://www.recall.ai/customers), captured 2026-10-24 | 2026-10-24 |
| Recall.ai | [Claap](https://www.usedby.ai/companies/claap.md) | Observed | [recall.ai](https://www.recall.ai/customers), captured 2026-10-24 | 2026-10-24 |
| Recall.ai | [Revenue.io](https://www.usedby.ai/companies/revenueio.md) | Observed | [recall.ai](https://www.recall.ai/customers), captured 2026-10-24 | 2026-10-24 |
| Recall.ai | [Outplay](https://www.usedby.ai/companies/outplay.md) | Observed | [recall.ai](https://recall.ai/customers) | Not dated |
| Recall.ai | [Attio](https://www.usedby.ai/companies/attio.md) | Observed | [recall.ai](https://www.recall.ai/customers), captured 2026-10-24 | 2026-10-24 |
| AssemblyAI | [CallRail](https://www.usedby.ai/companies/callrail.md) | Confirmed | [assemblyai.com](https://www.assemblyai.com/customers/callrail-customer-story), captured 2026-10-10 | 2026-10-21 |
| AssemblyAI | [Kapwing](https://www.usedby.ai/companies/kapwing.md) | Confirmed | [assemblyai.com](https://www.assemblyai.com/customers/kapwing-customer-story), captured 2026-10-10 | 2026-10-21 |
| AssemblyAI | [Veed.io](https://www.usedby.ai/companies/veedio.md) | Confirmed | [assemblyai.com](https://www.assemblyai.com/customers/veed-customer-story), captured 2026-10-02 | 2026-10-21 |
| AssemblyAI | [Aloware](https://www.usedby.ai/companies/aloware.md) | Confirmed | [assemblyai.com](https://www.assemblyai.com/customers/aloware-customer-story), captured 2026-10-08 | 2026-10-21 |
| AssemblyAI | [Grain](https://www.usedby.ai/companies/grain.md) | Confirmed | [assemblyai.com](https://www.assemblyai.com/customers/grain-customer-story), captured 2026-10-02 | 2026-10-21 |
| AssemblyAI | [Jiminny](https://www.usedby.ai/companies/jiminny.md) | Confirmed | [assemblyai.com](https://www.assemblyai.com/customers/jiminny-customer-story), captured 2026-10-10 | 2026-10-21 |
| AssemblyAI | [WhatConverts](https://www.usedby.ai/companies/whatconverts.md) | Confirmed | [assemblyai.com](https://www.assemblyai.com/customers/whatconverts-customer-story), captured 2026-10-02 | 2026-10-21 |
| AssemblyAI | [Apollo.io](https://www.usedby.ai/companies/apolloio.md) | Observed | [assemblyai.com](https://www.assemblyai.com/), captured 2026-10-21 | 2026-10-21 |
| AssemblyAI | [Liine](https://www.usedby.ai/companies/liine.md) | Observed | [assemblyai.com](https://www.assemblyai.com/customers), captured 2026-10-21 | 2026-10-21 |
| AssemblyAI | [PhoneBurner](https://www.usedby.ai/companies/phoneburner.md) | Observed | [assemblyai.com](https://www.assemblyai.com/customers), captured 2026-10-21 | 2026-10-21 |
| AssemblyAI | [EdgeTier](https://www.usedby.ai/companies/edgetier.md) | Observed | [assemblyai.com](https://www.assemblyai.com/customers), captured 2026-10-21 | 2026-10-21 |
| Deepgram | [Wistia](https://www.usedby.ai/companies/wistia.md) | Confirmed | [deepgram.com](https://deepgram.com/customers/wistia), captured 2026-10-09 | 2026-10-25 |
| Deepgram | [CallTrackingMetrics](https://www.usedby.ai/companies/calltrackingmetrics.md) | Confirmed | [deepgram.com](https://deepgram.com/customers/calltrackingmetrics), captured 2026-10-09 | 2026-10-25 |
| Deepgram | [Revenue.io](https://www.usedby.ai/companies/revenueio.md) | Confirmed | [deepgram.com](https://deepgram.com/customers/revenueio), captured 2026-10-09 | 2026-10-25 |
| Deepgram | [Podsights](https://www.usedby.ai/companies/podsights.md) | Confirmed | [deepgram.com](https://deepgram.com/customers/podsights), captured 2026-10-09 | 2026-10-25 |
| Deepgram | [BIGVU](https://www.usedby.ai/companies/bigvu.md) | Confirmed | [deepgram.com](https://deepgram.com/customers/bigvu), captured 2026-10-09 | 2026-10-25 |
| Deepgram | [UpdateAI](https://www.usedby.ai/companies/updateai.md) | Confirmed | [deepgram.com](https://deepgram.com/customers/updateai), captured 2026-10-09 | 2026-10-25 |
| Deepgram | [Cresta](https://www.usedby.ai/companies/cresta.md) | Observed | [deepgram.com](https://deepgram.com/), captured 2026-10-25 | 2026-10-25 |
| Deepgram | [Nytro.ai](https://www.usedby.ai/companies/nytroai.md) | Observed | [deepgram.com](https://deepgram.com/customers), captured 2026-10-25 | 2026-10-25 |
| Cartesia | [Cresta](https://www.usedby.ai/companies/cresta.md) | Confirmed | [cartesia.ai](https://www.cartesia.ai/customers/cresta), captured 2026-10-08 | 2026-10-24 |
| Cartesia | [11X](https://www.usedby.ai/companies/11x.md) | Confirmed | [cartesia.ai](https://www.cartesia.ai/customers/11x), captured 2026-10-08 | 2026-10-24 |
| Cartesia | [Rox](https://www.usedby.ai/companies/rox.md) | Confirmed | [cartesia.ai](https://www.cartesia.ai/customers/rox), captured 2026-10-08 | 2026-10-24 |
| Cartesia | [Telli](https://www.usedby.ai/companies/telli.md) | Confirmed | [cartesia.ai](https://www.cartesia.ai/customers/telli), captured 2026-10-08 | 2026-10-24 |
| Cartesia | [Regal](https://www.usedby.ai/companies/regal.md) | Confirmed | [cartesia.ai](https://www.cartesia.ai/customers/regal), captured 2026-10-08 | 2026-10-24 |
| Cartesia | [Fundamento](https://www.usedby.ai/companies/fundamento.md) | Observed | [cartesia.ai](https://www.cartesia.ai/customers), captured 2026-10-24 | 2026-10-24 |
| LiveKit | [Salesforce](https://www.usedby.ai/companies/salesforce.md) | Observed | [livekit.com](https://livekit.com/customers), captured 2026-10-25 | 2026-10-25 |
| LiveKit | [Cresta](https://www.usedby.ai/companies/cresta.md) | Observed | [livekit.com](https://livekit.com/customers), captured 2026-10-25 | 2026-10-25 |
| LiveKit | [Casper Studios](https://www.usedby.ai/companies/casper-studios.md) | Observed | [livekit.com](https://livekit.com/customers), captured 2026-10-25 | 2026-10-25 |
| LiveKit | [Podium](https://www.usedby.ai/companies/podium.md) | Observed | [livekit.com](https://livekit.com/), captured 2026-10-25 | 2026-10-25 |
| LiveKit | [Telli](https://www.usedby.ai/companies/telli.md) | Observed | [livekit.com](https://livekit.com/customers), captured 2026-10-25 | 2026-10-25 |

## Method

Public customer lines of active Speech & voice APIs tools at companies classified in Marketing & Sales. No software vendor had to be left out. Company mix by strongest proof: 30 confirmed, 0 declared, 14 observed and 0 signals.

## Questions

### Which Speech & voice APIs tools do Marketing & Sales companies use most?

Recall.ai leads: 22 of the 44 Marketing & Sales companies on usedby that use Speech & voice APIs tools use it. Next: AssemblyAI (11), Deepgram (8), Cartesia (6), and LiveKit (5).

### How many Marketing & Sales companies use Speech & voice APIs tools?

44 Marketing & Sales 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 44 companies, each counted at its strongest proof: 30 confirmed, 0 declared, 14 observed and 0 known from a job post.

### How does usedby build this ranking?

usedby counts each Marketing & Sales 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. Every line shows its proof and the date usedby last checked it.

Speech & voice APIs by industry within Marketing & Sales: [Sales Tech & CRM](https://www.usedby.ai/companies/industry/sales-tech-crm/speech-audio-api.md) (28)

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

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