Cartesia

Cartesia is an AI company founded by a team of Stanford researchers, specializing in real-time, multimodal AI using state space models (SSMs). Their mission is to create interactive AI that operates on any device, focusing on real-time intelligence across various modalities, including text, audio, video, images, and time-series data. The company is backed by investors like Kleiner Perkins and emphasizes low-latency infrastructure for enterprise applications, ensuring compliance with SOC-2 and HIPAA standards. Cartesia's flagship product, Sonic, is a real-time text-to-speech (TTS) API designed for ultra-low-latency voice generation. It features impressive capabilities such as voice cloning, support for multiple languages, and expressive audio options like AI laughter and emotion. Sonic is deployed through a web playground, API, and on-device support, making it suitable for a wide range of applications, including customer support, healthcare, media, gaming, and enterprise automation. With a growing customer base, Sonic is proven to deliver consistent performance globally.

Information Technology & Services San Francisco, United States Founded 2023 ~78 employees Private · Venture

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Employees
78
+14.7% in 3 months
Total funding
$191M
Last round Venture, Nov 2025
12-month attrition
38.5%
Tech: 54.2%
H1B filings, FY2026
11
Sponsors visas
Open jobs
11
Last 30 days

H-1B sponsorship

H-1B Sponsorship Limited
H-1B Filings by Department
Engineering20

The department split adds up all the years listed above. FY2026 alone: 11 filings.

Funding

  • Nov 2025 · Venture · $100M · Nvidia, Lightspeed Venture Partners, Kleiner Perkins
  • Mar 2025 · Series A · $64M · Lightspeed Venture Partners, TheFactory, Kleiner Perkins
  • Dec 2024 · Seed · $27M · Lightspeed Venture Partners, Conviction, TheFactory

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Cartesia FAQ

How many employees does Cartesia have?

Cartesia has about 78 employees, up 14.7% over the last 3 months (as of Apr 2026).

Does Cartesia sponsor H1B visas?

Yes. Cartesia filed 11 H1B (LCA) applications in FY2026, according to the latest U.S. Department of Labor disclosures. Most of them were for Engineering roles.

How much funding has Cartesia raised?

Cartesia has raised $191M in total funding.

Data from Company Prospectus, DOL LCA disclosures, WARN notices and 6figr salary profiles.