# Voice AI companies

Started September 28, 2026 · Updated September 28, 2026 · Presspool · https://presspool.ai/niches/voice-ai

Companies whose main product is voice AI: speech synthesis and voice models, speech recognition models, real-time voice agent platforms, and AI phone and voice agents sold as the core product. Presspool has verified 19 companies on this map so far. Each entry is taken from the company's own website and confirmed by an independent source, both linked on the entry. No company pays to be listed.

| Company | What it does | Latest announced financing |
| --- | --- | --- |
| [ElevenLabs](https://presspool.ai/companies/elevenlabs-io) | ElevenLabs offers an AI voice generator and a voice agents platform, with thousands of lifelike voices across dozens of languages through APIs and SDKs. | $500M, Series D (February 4, 2026) |
| [Parloa](https://presspool.ai/companies/parloa-com) | Parloa runs an AI agent management platform whose agents handle millions of customer conversations for contact centers in any language. | $350M, Series D (January 15, 2026) |
| [Sesame](https://presspool.ai/companies/sesame-com) | Sesame makes personal voice agents and is developing audio-first eyewear for talking to them hands-free. | $250M, Series B (October 21, 2025) |
| [Deepgram](https://presspool.ai/companies/deepgram-com) | Deepgram provides enterprise voice AI APIs for speech-to-text, text-to-speech and voice agents built for real-time conversation. | $130M, Series C (January 13, 2026) |
| [Assort Health](https://presspool.ai/companies/assorthealth-com) | Assort Health runs an AI agents platform that handles the patient journey, including patient phone calls, for healthcare organizations. | $120M, Series C (June 24, 2026) |
| [Cartesia](https://presspool.ai/companies/cartesia-ai) | Cartesia builds low-latency speech models on state space models and serves them by cloud API, on-premise or on-device. | $100M (date not confirmed) |
| [Gradium](https://presspool.ai/companies/gradium-ai) | Gradium builds real-time voice AI models for text-to-speech, speech-to-text and voice cloning. | $100M (seed total after extension), Seed extension (July 8, 2026) |
| [LiveKit](https://presspool.ai/companies/livekit-com) | LiveKit offers an open-source framework and developer cloud for building, deploying and scaling voice, video and physical AI agents. | $100M, Series C (date not confirmed) |
| [PolyAI](https://presspool.ai/companies/poly-ai) | PolyAI builds lifelike voice AI agents for enterprises on its Agentic Dialog Platform. | $86M, Series D (December 15, 2025) |
| [Speechmatics](https://presspool.ai/companies/speechmatics-com) | Speechmatics builds low-latency speech-to-text APIs that handle accents, multiple speakers and multilingual speech. | $62M, Series B (June 28, 2022) |
| [Fish Audio](https://presspool.ai/companies/fish-audio) | Fish Audio provides text-to-speech, voice cloning and voice-AI APIs for building voice agents, and hosts a large library of user voices. | $52M, Seed (July 28, 2026) |
| [AssemblyAI](https://presspool.ai/companies/assemblyai-com) | AssemblyAI is voice AI infrastructure for developers, with APIs for speech-to-text, real-time transcription, speech understanding and voice agents. | $50M, Series C (December 4, 2023) |
| [Bland](https://presspool.ai/companies/bland-ai) | Bland is an enterprise voice AI platform for phone agents in regulated industries, with models built for phone calls. | $50M, Series C (June 16, 2026) |
| [Vapi](https://presspool.ai/companies/vapi-ai) | Vapi is a platform where developers build, deploy and improve voice agents. | $50M, Series B (May 12, 2026) |
| [Rime](https://presspool.ai/companies/rime-ai) | Rime makes conversational voice models for enterprise customer conversations. | $24M, Series A (July 15, 2026) |
| [Deepdub](https://presspool.ai/companies/deepdub-ai) | Deepdub provides AI dubbing and expressive, on-demand AI voice performance. | $20M, Series A (February 10, 2022) |
| [Synthflow AI](https://presspool.ai/companies/synthflow-ai) | Synthflow is an enterprise voice AI agent platform with its own telephony for automating phone calls. | $20M, Series A (June 25, 2025) |
| [Smallest.ai](https://presspool.ai/companies/smallest-ai) | Smallest.ai offers a real-time voice AI suite for enterprises: voice agents, speech-to-text, text-to-speech and a full-duplex speech-to-speech model. | $13M, Series A (July 31, 2026) |
| [Retell AI](https://presspool.ai/companies/retellai-com) | Retell AI is a voice agent platform for automating phone calls. | $4.6M, Seed (date not confirmed) |

## Sources for each company

- ElevenLabs: [own site](https://elevenlabs.io/), [independent source](https://www.cnbc.com/2026/02/04/nvidia-backed-ai-startup-elevenlabs-11-billion-valuation.html), [elevenlabs.io](https://elevenlabs.io/blog/series-d)
- Parloa: [own site](https://www.parloa.com/), [independent source](https://techcrunch.com/2026/01/15/parloa-triples-its-valuation-in-8-months-to-3b-with-350m-raise/), [techcrunch.com](https://techcrunch.com/2026/01/15/parloa-triples-its-valuation-in-8-months-to-3b-with-350m-raise/)
- Sesame: [own site](https://www.sesame.com/), [independent source](https://techcrunch.com/2025/10/21/sesame-the-conversational-ai-startup-from-oculus-founders-raises-250m-and-launches-beta/), [techcrunch.com](https://techcrunch.com/2025/10/21/sesame-the-conversational-ai-startup-from-oculus-founders-raises-250m-and-launches-beta/)
- Deepgram: [own site](https://deepgram.com/), [independent source](https://techcrunch.com/2026/01/13/deepgram-raises-130m-at-1-3b-valuation-and-buys-a-yc-ai-startup/), [techcrunch.com](https://techcrunch.com/2026/01/13/deepgram-raises-130m-at-1-3b-valuation-and-buys-a-yc-ai-startup/)
- Assort Health: [own site](https://www.assorthealth.com/blog/assort-health-raises-120-million-series-c-to-scale-largest-deployment-of-ai-agents-for-the-patient-journey), [independent source](https://www.forbes.com/sites/amyfeldman/2026/06/24/these-29-year-olds-ai-chatbot-for-scheduling-doctor-visits-is-now-worth-12-billion/), [assorthealth.com](https://www.assorthealth.com/blog/assort-health-raises-120-million-series-c-to-scale-largest-deployment-of-ai-agents-for-the-patient-journey)
- Cartesia: [own site](https://www.cartesia.ai/), [independent source](https://www.hindustantimes.com/trending/us/who-is-karan-goel-dps-rk-puram-and-iit-delhi-graduate-who-raised-100-million-for-his-silicon-valley-startup-101761731790909.html), [hindustantimes.com](https://www.hindustantimes.com/trending/us/who-is-karan-goel-dps-rk-puram-and-iit-delhi-graduate-who-raised-100-million-for-his-silicon-valley-startup-101761731790909.html)
- Gradium: [own site](https://gradium.ai/), [independent source](https://techcrunch.com/2026/07/09/paris-based-ai-voice-startup-gradium-raises-100m-seed-backed-by-nvidia/), [gradium.ai](https://gradium.ai/blog/gradium-100-million-funding-nvidia)
- LiveKit: [own site](https://livekit.com/), [independent source](https://www.unite.ai/livekit-reaches-1-billion-valuation-as-voice-ai-infrastructure-heats-up/), [livekit.com](https://livekit.com/blog/livekit-series-c)
- PolyAI: [own site](https://poly.ai/), [independent source](https://www.cmswire.com/customer-experience/polyai-raises-86m-series-d-for-enterprise-voice-ai/), [cmswire.com](https://www.cmswire.com/customer-experience/polyai-raises-86m-series-d-for-enterprise-voice-ai/)
- Speechmatics: [own site](https://www.speechmatics.com/), [independent source](https://techcrunch.com/2022/06/28/speechmatics-raises-62m-for-its-inclusive-approach-to-speech-to-text-ai/), [techcrunch.com](https://techcrunch.com/2022/06/28/speechmatics-raises-62m-for-its-inclusive-approach-to-speech-to-text-ai/)
- Fish Audio: [own site](https://fish.audio/), [independent source](https://techcrunch.com/2026/07/28/fish-audio-raises-50m-seed-to-build-ai-voice-models-for-creators-and-enterprises/), [techcrunch.com](https://techcrunch.com/2026/07/28/fish-audio-raises-50m-seed-to-build-ai-voice-models-for-creators-and-enterprises/)
- AssemblyAI: [own site](https://www.assemblyai.com/), [independent source](https://techcrunch.com/2023/12/04/assemblyai-nabs-50m-to-build-and-serve-ai-speech-models/), [techcrunch.com](https://techcrunch.com/2023/12/04/assemblyai-nabs-50m-to-build-and-serve-ai-speech-models/)
- Bland: [own site](https://www.bland.ai/), [independent source](https://fortune.com/2026/06/16/voice-ai-bland-50-million-after-being-rejected-by-180-investors/), [fortune.com](https://fortune.com/2026/06/16/voice-ai-bland-50-million-after-being-rejected-by-180-investors/)
- Vapi: [own site](https://vapi.ai/), [independent source](https://techcrunch.com/2026/05/12/vapi-hits-500m-valuation-as-amazon-ring-chose-its-ai-platform-over-40-rivals/), [techcrunch.com](https://techcrunch.com/2026/05/12/vapi-hits-500m-valuation-as-amazon-ring-chose-its-ai-platform-over-40-rivals/)
- Rime: [own site](https://www.rime.ai/), [independent source](https://techcrunch.com/2026/07/15/rime-picks-up-24m-series-a-to-help-enterprises-field-customer-calls/), [techcrunch.com](https://techcrunch.com/2026/07/15/rime-picks-up-24m-series-a-to-help-enterprises-field-customer-calls/)
- Deepdub: [own site](https://deepdub.ai/), [independent source](https://www.prnewswire.com/news-releases/deepdub-raises-20-million-in-series-a-funding-led-by-insight-partners-to-bring-ai-based-dubbing-global-301479228.html), [prnewswire.com](https://www.prnewswire.com/news-releases/deepdub-raises-20-million-in-series-a-funding-led-by-insight-partners-to-bring-ai-based-dubbing-global-301479228.html)
- Synthflow AI: [own site](https://synthflow.ai/), [independent source](https://www.businessinsider.com/synthflow-ai-pitch-deck-funding-voice-2025-6), [synthflow.ai](https://synthflow.ai/news/synthflow-raises-20m-series-a)
- Smallest.ai: [own site](https://smallest.ai/), [independent source](https://techcrunch.com/2026/07/31/smallest-ai-raises-13m-to-build-ultra-fast-voice-ai-that-sounds-genuinely-human/), [techcrunch.com](https://techcrunch.com/2026/07/31/smallest-ai-raises-13m-to-build-ultra-fast-voice-ai-that-sounds-genuinely-human/)
- Retell AI: [own site](https://www.retellai.com/), [independent source](https://techcrunch.com/2026/07/15/rime-picks-up-24m-series-a-to-help-enterprises-field-customer-calls/), [retellai.com](https://www.retellai.com/blog/seed-announcement)

## Which of these companies AI names

On September 28, 2026, Presspool asked the 8 questions below on ChatGPT, Gemini, Copilot, Google AI Mode and Google AI Overviews and recorded 38 answers. Not sampled: 2 Google AI Overviews answers. A company counts when an answer names it or cites its website. Answers vary from run to run, so each count is a dated sample, not a verdict.

| Company | Named or cited in | ChatGPT | Gemini | Copilot | Google AI Mode | Google AI Overviews |
| --- | --- | --- | --- | --- | --- | --- |
| ElevenLabs | 31 of 38 answers | 6 of 8 | 6 of 8 | 7 of 8 | 7 of 8 | 5 of 6 |
| Parloa | 0 of 38 answers | 0 of 8 | 0 of 8 | 0 of 8 | 0 of 8 | 0 of 6 |
| Sesame | 0 of 38 answers | 0 of 8 | 0 of 8 | 0 of 8 | 0 of 8 | 0 of 6 |
| Deepgram | 16 of 38 answers | 3 of 8 | 3 of 8 | 5 of 8 | 3 of 8 | 2 of 6 |
| Assort Health | 0 of 38 answers | 0 of 8 | 0 of 8 | 0 of 8 | 0 of 8 | 0 of 6 |
| Cartesia | 11 of 38 answers | 2 of 8 | 2 of 8 | 4 of 8 | 1 of 8 | 2 of 6 |
| Gradium | 1 of 38 answers | 0 of 8 | 0 of 8 | 1 of 8 | 0 of 8 | 0 of 6 |
| LiveKit | 4 of 38 answers | 3 of 8 | 0 of 8 | 0 of 8 | 1 of 8 | 0 of 6 |
| PolyAI | 14 of 38 answers | 3 of 8 | 4 of 8 | 3 of 8 | 2 of 8 | 2 of 6 |
| Speechmatics | 4 of 38 answers | 0 of 8 | 2 of 8 | 1 of 8 | 1 of 8 | 0 of 6 |
| Fish Audio | 6 of 38 answers | 1 of 8 | 1 of 8 | 2 of 8 | 1 of 8 | 1 of 6 |
| AssemblyAI | 7 of 38 answers | 0 of 8 | 1 of 8 | 2 of 8 | 2 of 8 | 2 of 6 |
| Bland | 15 of 38 answers | 4 of 8 | 3 of 8 | 3 of 8 | 3 of 8 | 2 of 6 |
| Vapi | 16 of 38 answers | 4 of 8 | 3 of 8 | 3 of 8 | 3 of 8 | 3 of 6 |
| Rime | 1 of 38 answers | 0 of 8 | 0 of 8 | 0 of 8 | 1 of 8 | 0 of 6 |
| Deepdub | 0 of 38 answers | 0 of 8 | 0 of 8 | 0 of 8 | 0 of 8 | 0 of 6 |
| Synthflow AI | 14 of 38 answers | 3 of 8 | 3 of 8 | 3 of 8 | 3 of 8 | 2 of 6 |
| Smallest.ai | 4 of 38 answers | 1 of 8 | 1 of 8 | 1 of 8 | 1 of 8 | 0 of 6 |
| Retell AI | 20 of 38 answers | 5 of 8 | 4 of 8 | 4 of 8 | 4 of 8 | 3 of 6 |

## Sources the AI apps cited most for these questions

1. retellai.com: 13 of 38 answers
2. youtube.com: 7 of 38 answers
3. reddit.com: 6 of 38 answers
4. inworld.ai: 5 of 38 answers
5. brilo.ai: 4 of 38 answers
6. elevenlabs.io: 3 of 38 answers
7. getvoip.com: 3 of 38 answers
8. linkedin.com: 3 of 38 answers
9. ringly.io: 3 of 38 answers
10. techcrunch.com: 3 of 38 answers
11. zapier.com: 3 of 38 answers
12. aisotools.com: 2 of 38 answers
13. artificial-intelligence-wiki.com: 2 of 38 answers
14. cartesia.ai: 2 of 38 answers
15. google.com: 2 of 38 answers

## What counts as Voice AI

A company joins this map when its own site describes Voice AI as its main product and an independent source confirms it. Out of scope: contact-center suites where voice AI is a feature, voice features inside large platforms, and telephony carriers. Definitions are versioned; this is version 1. Corrections need a public source: see [Contact](https://presspool.ai/contact).

## Questions this map tracks

- Which companies are building voice AI?
- What is the best text-to-speech AI?
- What is the best speech-to-text API?
- What is the best platform for building AI voice agents?
- Which voice AI startups have raised funding recently?
- What are the alternatives to ElevenLabs?
- What is the best AI phone agent for customer calls?
- What are the leading voice AI companies?

## Changes

- September 28, 2026: Map started with 19 verified companies.

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Presspool is an independent record of AI startup funding. Rounds are listed because they were publicly announced, and no company pays to be listed. Who publishes it and how it stays independent: [About](https://presspool.ai/about).

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