About
Cartesia offers a real-time, multimodal intelligence platform utilizing state space models (SSMs) for efficient data processing. Their flagship product, the Sonic Generative Voice API, provides ultra-low latency speech synthesis with exceptionally natural AI voices capable of laughter and emotions.
Key facts
At-a-glance profile data
- Website
- cartesia.ai
- Headquarters
- San Francisco, United States
- Founded
- 2022
- Employees
- 116
- Total funding
- $191M (Series B)
- Business model
- B2B
- Tags
- Voice AIConversational AIAI Voice SynthesisAI Voice CloningText-to-Speech
Cartesia pricing
| Product | Plan | Price | Includes |
|---|---|---|---|
| Sonic | Free | $0 / month | 20K credits per month, Sonic-3.6 minutes ~27 per month, Concurrent requests 2 |
| Sonic | Pro | $5 / month | 100K credits per month, Sonic-3.6 minutes ~133 per month, Concurrent requests 3 |
| Sonic | Startup | $49 / month | 1.25M credits per month, Sonic-3.6 minutes ~1,667 per month, Concurrent requests 5 |
| Sonic | Scale | $299 / month | 8M credits per month, Sonic-3.6 minutes ~10,667 per month, Concurrent requests 15 |
| Sonic | Enterprise | Contact sales | Custom credits and agent usage, Volume pricing, Custom concurrency limits |
| Ink | Free | $0 / month | 20K credits per month, Ink-2 hours ~1h 51m per month, Concurrent requests 8 |
| Ink | Pro | $5 / month | 100K credits per month, Ink-2 hours ~9h 16m per month, Concurrent requests 12 |
| Ink | Startup | $49 / month | 1.25M credits per month, Ink-2 hours ~115h 44m per month, Concurrent requests 20 |
| Ink | Scale | $299 / month | 8M credits per month, Ink-2 hours ~740h 44m per month, Concurrent requests 60 |
| Ink | Enterprise | Contact sales | Custom credits and agent usage, Volume pricing, Custom concurrency limits |
| Managed Agents | Free | $0 / month | $1 prepaid agents per month, 1 Cartesia-provisioned phone number, Concurrent calls 8 |
| Managed Agents | Pro | $5 / month | $5 prepaid agents per month, 3 Cartesia-provisioned phone numbers, Concurrent calls 12 |
Pay for the credits and agent minutes you use, with unlimited workspace seats on every plan. Pause or cancel anytime.
Pay for the credits and agent minutes you use, with unlimited workspace seats on every plan. Pause or cancel anytime.
Plans as published by Cartesia, checked September 2026. Current prices on cartesia.ai
Tech stack
Detected on cartesia.ai and in its job posts, last scanned 25 Sept 2026. Run your own scan
- Frontend
- Astro, Tailwind CSS, Next.js, TypeScript
- Backend
- Python
- Auth
- Clerk
- Observability
- incident.io
- CDN
- Vercel
- Hosting
- AWS, Google Cloud
- Email provider
- Google Workspace
- DevOps
- Kubernetes, Docker
Frequently asked
How much funding has Cartesia raised?
Cartesia has raised a total of $191M in funding. The most recent round on record is Series B.
How many employees does Cartesia have?
Cartesia has approximately 116 people on record.
Azure Text-to-Speech
Cartesia's Sonic model competes with Azure Text-to-Speech in providing AI voice synthesis for developers and enterprises, with Cartesia emphasizing ultra-low latency and natural-sounding voices.
Amazon Polly
Cartesia's Sonic model offers an alternative to Amazon Polly for text-to-speech capabilities, particularly for applications requiring real-time, expressive voice generation.
Google Cloud Text-to-Speech
Cartesia directly competes with Google Cloud Text-to-Speech by offering its own text-to-speech API, with a focus on faster response times and more natural voice quality for conversational AI.
Enterprise Software
ServiceNow, an enterprise software company, already uses Cartesia to power secure, real-time enterprise voice agents, demonstrating a need for advanced voice AI in their platform.
Conversational AI Development
Rasa, an open-source conversational AI platform, has chosen Cartesia as its voice partner to meet enterprise-grade requirements for high-quality, low-latency voice interactions.
Real-time Communication Infrastructure
LiveKit, a real-time communication infrastructure provider, partnered with Cartesia because Sonic's State Space Models align with LiveKit's vision for next-generation AI agents.
Confirmed customer relationships for Cartesia. Speculative buyer-fit guesses are not shown.