Cartesia
Voice AI like you've never heard before
San Francisco, United States · Founded 2023 · $91.0M raised
- Headquarters
- San Francisco
- Employees
- 51–200
- Founded
- 2023
- Business Model
- B2B
- Website
- cartesia.ai
- Total Funding
- $91.0M
- Last Round
- $64.0M Series AMar 2025
- Rounds
- 2
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
Indexed holds 2 funding rounds and 10 investors for this company. The full record is or through the API.
About
Cartesia is an AI company building next-generation real-time speech and multimodal intelligence models. Its flagship product, Sonic, is a streaming text-to-speech API delivering sub-100ms latency across 40+ languages, making it the industry standard for low-latency voice AI. Cartesia pioneered the use of State Space Models (SSMs) for foundation model development, enabling ultra-fast, expressive voice generation with natural laughter, emotion, and multilingual support. The company serves industries including healthcare, customer service, gaming, and enterprise applications, and offers instant and professional voice cloning capabilities. Cartesia also provides Line, a voice agent development platform for building production-grade conversational AI.
Summary
Cartesia is an Artificial Intelligence company based in San Francisco, United States, founded in 2023. It has raised $91.0M in total across 2 rounds, most recently a $64.0M Series A round in Mar 2025. Investors include Index Ventures, Kleiner Perkins and Lightspeed Venture Partners.
Tech & App Stack
49 technologies & apps tracked
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Funding History
Mar 2025
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Funding: Seed through Series A. Amounts, valuations, and investors where available.
Investors
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