Company · Voice, image & video
Cartesia revenue, valuation & funding
Cartesia is a private San Francisco company that builds real-time voice AI models and agents. Its last confirmed round was a $64M Series A led by Kleiner Perkins in March 2025. It has published no valuation or revenue and has announced no IPO plan.
At a glance
- Valuation: no valuation has been confirmed. The last confirmed round was a $64M Series A in March 2025, led by Kleiner Perkins.
- Revenue: not published, and no figure has been reported.
- Status: private. No stock ticker. No IPO plan announced.
- Founded: September 2023, by Karan Goel, Albert Gu, Arjun Desai, Brandon Yang and Christopher Ré.
- CEO: Karan Goel.
- Investors: Kleiner Perkins, Index Ventures, Lightspeed, NVIDIA and General Catalyst, among others.
- Products: Sonic for text-to-speech, Ink for speech-to-text, and Line and Managed Agents for voice agents.
- Headquarters: San Francisco.
- Employees: about 100, per Contrary Research in September 2026.
Is Cartesia public? Can you buy its stock?
No. Cartesia is a private company, so its shares don't trade on any stock exchange and it has no ticker symbol, according to Forge.
Cartesia hasn't announced any plan to go public. No IPO filing has been reported.
Its shares are held by its founders, staff and investors, including Kleiner Perkins and Index Ventures. This page reports facts and gives no investment advice.
Valuation, round by round
Cartesia has published no valuation, and its confirmed funding went from a $27M seed in December 2024 to a $64M Series A in March 2025.
| Date | Valued at | Raised | Led by | Source |
|---|---|---|---|---|
| Mar 2025 | — | $64M | Kleiner Perkins | Cartesia's blog |
| Dec 2024 | — | $27M | Index Ventures | Cartesia's blog |
Sacra says Cartesia closed a $100M Series A-II in October 2025, but no primary report confirms it. TechCrunch described the seed as a $22M round that brought the total raised to $27M.
How Cartesia makes money
Cartesia sells its voice models and agents to developers and businesses. Sacra describes a developer-first platform that charges both by usage and by subscription.
- Free plan. Includes 20K credits a month. Cartesia's pricing page
- Paid plans start at $5 a month for text-to-speech and speech-to-text. Cartesia's pricing page
- Scale costs $299 a month and includes 8M credits plus $299 for voice agents. Cartesia's pricing page
- Voice agents cost $0.03 a minute, plus LLM and telephony costs. Cartesia's pricing page
- Launch discount. Managed Agents launched in October 2026 at 50% off, at $0.03 a minute. Cartesia's blog
- Enterprise pricing is custom. Cartesia's pricing page
Products
Cartesia's models use state space models. Its co-founders Albert Gu and Karan Goel helped create S4, one such architecture.
- Sonic, its text-to-speech model. Sonic 2.0 launched on March 11, 2025, built on a new state space model architecture, with voice changer and infill endpoints. Cartesia's blog
- Ink, its speech-to-text model. Sacra
- Line, for building and deploying complete voice agents. Sacra
- Managed Agents (October 29, 2026). An end-to-end voice agent platform for enterprise conversations. Cartesia's blog
Customers
In March 2025 Cartesia said on its blog that it had powered millions of calls over the past year. It also said it had helped tens of thousands of creators.
At the launch of Managed Agents in October 2026, Cartesia said the product had already powered tens of millions of conversations. Those came in finance, retail, hospitality and healthcare.
- ServiceNow built Cartesia's Sonic, Ink and orchestration into its AI Voice Agents, per a customer story dated October 2025. Cartesia's website
- EliseAI runs more than 5M voice calls a month on Cartesia, according to Cartesia's homepage. Cartesia's website
- Vapi and Retell use Cartesia as a default speech layer in their own voice-agent platforms. Sacra
- Maven AGI, Forethought, Assort Health and Arini use Cartesia directly, per Sacra. Sacra
Leadership
- Karan Goel, co-founder and CEO. He co-created the S4 sequence-modeling architecture. Cartesia's website
- Albert Gu, co-founder and chief scientist. He co-created the S4 and Mamba state space models. Cartesia's website
- Arjun Desai and Brandon Yang, co-founders. Cartesia's website
- Christopher Ré, a Stanford professor, is also named as a founder by Contrary Research. Contrary Research
Who owns Cartesia?
Its founders, staff and investors. As a private company it doesn't publish who holds what, and no stake has been disclosed.
- Kleiner Perkins led the $64M Series A in March 2025. Cartesia's blog
- Index Ventures led the $27M seed round in December 2024. Cartesia's blog
- Lightspeed, Factory, Conviction, General Catalyst, A* and SV Angel joined the seed round, along with 90 angel investors. Cartesia's blog
- NVIDIA, Greycroft, Dell Technologies Capital and Samsung Ventures took part in the Series A, according to Sacra. Sacra
Competitors
Cartesia competes both on speech models and on full voice agents. Sacra says it launched Ink in response to Deepgram's speech-to-text offering.
Timeline and latest news
From its founding to the latest reports, newest first.
- Oct 29, 2026Latest
Launched Managed Agents, an end-to-end voice agent platform for enterprise. Cartesia's blog - Oct 29, 2026Latest
Priced Managed Agents at $0.03 a minute, 50% off, for its launch. Cartesia's blog - Oct 29, 2026Latest
Said Managed Agents had already powered tens of millions of conversations. Cartesia's blog - Sep 22, 2026
Contrary Research listed it at about 100 employees. Contrary Research - Oct 25, 2025
Published a customer story on ServiceNow using its voice AI in AI Voice Agents. Cartesia's website - Mar 11, 2025
Announced a $64M Series A led by Kleiner Perkins. Cartesia's blog - Mar 11, 2025
Launched Sonic 2.0, its text-to-speech model. Cartesia's blog - Mar 11, 2025
Said it had powered millions of calls over the past year. Cartesia's blog - Dec 12, 2024
Announced a $27M seed round led by Index Ventures. Cartesia's blog - Sep 2023
Founded by Karan Goel, Albert Gu, Arjun Desai, Brandon Yang and Christopher Ré. Contrary Research
Questions people ask
Is Cartesia a public company? Can I buy Cartesia stock?
No. Cartesia is private and has no ticker, so its shares aren't sold on any exchange, per Forge.
When will Cartesia IPO?
It hasn't announced any plan to go public, and no filing has been reported.
Who owns Cartesia?
Its founders, staff and investors, including Kleiner Perkins, Index Ventures, Lightspeed, NVIDIA and General Catalyst. Stakes haven't been disclosed.
Who is the CEO of Cartesia?
Karan Goel, who co-founded it in 2023.
Who founded Cartesia?
Karan Goel, Albert Gu, Arjun Desai, Brandon Yang and Stanford professor Christopher Ré, in September 2023, according to Contrary Research.
How much is Cartesia worth?
No valuation has been confirmed. Its last confirmed round was a $64M Series A led by Kleiner Perkins, announced in March 2025.
How much revenue does Cartesia make?
It doesn't publish revenue, and no figure has been reported.
How does Cartesia make money?
It charges developers and businesses by usage and by subscription. Paid plans start at $5 a month, and voice agents cost $0.03 a minute plus LLM and telephony, per its pricing page.
Who are Cartesia's customers?
ServiceNow, EliseAI, Vapi, Retell, Maven AGI, Forethought, Assort Health and Arini, among others. EliseAI runs more than 5M voice calls a month on it, per Cartesia.
Who are Cartesia's competitors?
ElevenLabs is its most visible direct rival, per Sacra. Others include Deepgram, OpenAI's Realtime API, Hume, Rime, PlayHT, Smallest.ai and Resemble AI.
People on Real Alpha
- Albert Gu, Co-founder & chief scientist, Cartesia
- Karan Goel, Co-founder & CEO, Cartesia
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How this page is sourced
Each figure links to the filing, company statement or news report it came from, with its date. Run rates are what reporters were told, not audited results; estimates and unconfirmed reports are marked. Quotes are what each person said on the record, with the minute they said it. Spotted something that's off? .
Last checked Nov 8, 2026