Cartesia AI

What if AI could learn and interact with the world just like a human?

RecommendedCartesia offers a cutting-edge, enterprise-grade voice AI platform powered by novel State Space Models, delivering unparalleled speed, accuracy, and naturalness for real-time conversational applications.

Cartesia is building the next generation of AI, focusing on interactive intelligence that learns from the world and improves with every interaction. They offer a full stack for interactive intelligence, including ultra-low latency speech-to-text (Ink), realistic text-to-speech (Sonic), and a platform for building voice agents (Line), all powered by their proprietary State Space Models (SSMs).

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Key Features:

Sonic: Fastest and most natural text-to-speech with sub-90ms latency and multilingual support (40+ languages).
Ink: Fastest and most accurate streaming speech-to-text with semantic endpointing and industry-leading latency.
Line: Platform for building and shipping enterprise voice agents with robust SDK, built-in evaluations, and fast deployment.
Voice Cloning & Localization: Instant voice cloning from 10 seconds of audio and localization into 42 languages.
State Space Models (SSMs): Proprietary architecture for ultra-low latency, long-context reasoning, and efficiency.

Pros

Enterprises needing real-time, highly accurate voice agents for customer support, sales, or recruitment.
Developers building conversational AI applications requiring sub-100ms latency for natural interactions.
Businesses with strict data residency and compliance needs (HIPAA, SOC 2, GDPR, PCI) for voice AI deployment.

Cons

Focus on enterprise-grade solutions may mean a steeper learning curve for individual developers.
Pricing model based on credits and agent minutes might require careful usage monitoring for cost optimization.
While offering cloud, on-premise, and on-device deployment, specific setup and integration efforts may vary.

Pricing

freemiumFree tier

Starting at:$4/mo

Free tier:20K credits/month, $1 prepaid agents/month

Plans

Free: 20K credits/month, $1 prepaid agents/month
Pro $4/mo: 100K credits/month, $5 prepaid agents/month, commercial use, instant voice cloning
Startup $39/mo: 1.25M credits/month, $49 prepaid agents/month, pro voice cloning, organizations
Scale $239/mo: 8M credits/month, $299 prepaid agents/month, priority support, high concurrency
Enterprise: Custom pricing, custom concurrency, DPAs/BAAs, SSO, security questionnaires

Trial:Free trial for paid services available, duration not specified but implies conversion to paid if not cancelled.

Categories:

Audio & Speech AI Infrastructure Code & Development

Tags:

real-time low-latency enterprise SSM voice AI speech synthesis speech recognition voice agents multilingual HIPAA SOC2 GDPR PCI

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Quick Decision

Try if: You need a high-performance, low-latency voice AI solution for real-time conversational agents, especially if you have enterprise-level security and compliance requirements.

Skip if: You are looking for a simple, low-cost TTS/STT solution for non-critical applications or do not require advanced voice agent capabilities.

Not for: Individuals or small teams with basic text-to-speech or speech-to-text needs who prioritize cost over cutting-edge performance.; Users who require a wide range of pre-built, off-the-shelf voice agent solutions without custom development.

Trust Signals

Team Size
medium

Compliance

HIPAA compliantSOC 2 Type 2GDPRPCI

Notable Customers

ServiceNowElise AISierraCallersTake2 AI

Tech Details

Platforms

webapi

Integrations

GitHubGoogle

AI Model
State Space Models (SSMs)

Open Source

Support

Channels

emailshared Slack channel (Enterprise tier)

Company

Name
Cartesia AI, Inc.

Cartesia is building the next generation of AI: ubiquitous, interactive intelligence that runs wherever you are. Their founding team met as PhDs at Stanford AI Lab, where they invented State Space Models (SSMs).

FAQ

Why is Ink-2 the best STT for voice agents?

Ink-2 is designed for voice agents with features like semantic endpointing, native turn detection (turn.start, turn.end, turn.eager_end), and industry-leading low latency (0.1s time to final transcript). It also boasts the lowest Word Error Rate (WER) and handles structured data and real-world audio settings.

How does Cartesia's pricing work for different products?

Cartesia uses a credit-based system for TTS and STT, and a per-minute charge for voice agents. Each plan includes a certain amount of credits and prepaid agent minutes. Concurrency limits also vary by plan. You can calculate estimated costs based on your usage needs on their pricing page.

Can Cartesia models be deployed on-premise or in a virtual private cloud (VPC)?

Yes, Cartesia states that their models and agents can be deployed across cloud, on-premise, and on-device. Inference runs in-region, ensuring data residency and compliance.

What security and compliance standards does Cartesia meet?

Cartesia is HIPAA compliant, SOC 2 Type 2 certified, GDPR compliant, and PCI compliant, offering enterprise-grade security for deployments.

What is the core technology behind Cartesia's AI models?

Cartesia's models are built on State Space Models (SSMs), a novel primitive for large-scale foundation models that deliver ultra-low latency, long-context reasoning, and greater efficiency at scale, differentiating them from traditional transformer-based architectures.

Use Cases

Enterprises needing real-time, highly accurate voice agents for customer support, sales, or recruitment.
Developers building conversational AI applications requiring sub-100ms latency for natural interactions.
Businesses with strict data residency and compliance needs (HIPAA, SOC 2, GDPR, PCI) for voice AI deployment.