Ease of use
8.0
Onboarding, navigation, and day-to-day workflow friction.
AI Voice Generators
Cartesia
Low-latency Sonic TTS, Ink transcription, voice cloning, and Line agents for real-time voice AI.
Cartesia: Low-latency Sonic TTS, Ink transcription, voice cloning, and Line agents for real-time voice AI. Pricing: From $5/mo + usage. Best for Real-time voice agents and conversational audio products and Low-latency TTS APIs for interactive apps.
Tool score: 8.3 / 10
Self-serve developer plansFrom $5/moLine Voice AgentsUsage-based from $0.06Team and organization plansFrom $49/mo
Free plan available
Tool scorecard
How the tool scores
A standardized tool profile score across usability, pricing value, feature depth, and support quality.
Tool score
8.3
/ 10Value for money
8.2
How much practical capability the product delivers for the price.
Features
8.8
Breadth, polish, and depth across the core product surface.
Support
8.2
Docs, help channels, and how easily issues get resolved.
Overview
Bottom line
Cartesia is a developer-first voice AI platform for building low-latency speech products around Sonic text-to-speech, Ink speech-to-text, voice cloning, localization, and Line voice agents. Its strongest fit is teams building real-time voice agents, interactive apps, dubbing workflows, narration systems, or product audio where first-byte latency, streaming, concurrency, and API control matter more than a finished creator studio.
The core caveat is that Cartesia is a usage and infrastructure decision as much as a voice-quality decision. Pricing combines monthly credit pools, prepaid agent dollars, metered agent minutes, concurrency limits, overages, and enterprise deployment routes, so teams need to model real scripts, call duration, STT volume, cloned-voice usage, and phone-number costs before scaling. Start with the free or Pro self-serve route for evaluation, move to Startup or Scale when commercial usage, organizations, professional voice cloning, and higher concurrency matter, and use Enterprise when custom deployment, compliance, or volume terms are required.
Pricing
Pricing snapshot
Pricing routes
Use these route cards to separate app subscriptions, API meters, team workspaces, and enterprise purchasing without flattening them into a single plan table. Open the pricing page for detailed plan or API meter facts.
Direct APIPrimary
Self-serve developer plans
From $5/mo
Monthly plans provide credits for Sonic TTS and Ink STT plus prepaid dollars for Line voice agents, making this the default route for developers evaluating and scaling API usage.
Direct API
Line Voice Agents
Usage-based from $0.06
Line agent usage is billed by agent minutes, with a separate per-minute telephony charge when using a Cartesia-provided phone number.
Team workspace
Team and organization plans
From $49/mo
Startup and Scale add organization features, professional voice cloning, larger credit pools, higher concurrency, and priority support for production teams.
Enterprise sales
Enterprise deployments
Custom
Enterprise is the route for custom credits, custom concurrency, SSO, compliance paperwork, shared support channels, on-premise, VPC, OEM, or regulated deployments.
Free
$0/mo + usage
Usage: 20K credits/mo; ~27 TTS min; ~1h51m STT; 1 agent slot; $1 prepaid agents
- Text to Speech and Speech to Text
- Instant voice cloning
Pro
$5/mo + usage
Usage: 100K credits/mo; ~133 TTS min; ~9h16m STT; 3 TTS concurrency; $5 prepaid agents
- Commercial use license
- Instant voice cloning
Startup
$49/mo + usage
Usage: 1.25M credits/mo; ~1,667 TTS min; ~115h42m STT; 5 TTS concurrency; $49 prepaid agents
- Professional voice cloning
- Organizations
Scale
$299/mo + usage
Usage: 8M credits/mo; ~10,667 TTS min; ~740h44m STT; 15 TTS concurrency; $299 prepaid agents
- Priority support
- High concurrency limits
Line voice agent usage
Usage-based API
Usage: $0.06 per minute for Line calls; $0.014 per minute with a Cartesia phone number; prepaid agent dollars vary by plan
- Metered voice agent minutes
- Separate telephony charge for Cartesia phone numbers
Enterprise
Custom quote or bundled pricing
Usage: Custom credits, agent usage, concurrency, deployment, and compliance terms
- Custom concurrency limits
- DPAs and BAAs for compliance
- SSO and shared Slack channel
- On-premise, VPC, or OEM licensing by agreement
Capabilities
Input types
text, audio
Output types
audio, text
Supported platforms
Web
Delivery modes
Web app, API, SDK, Developer console
Company context
Company
Cartesia
Founded
Not specified
Headquarters
Not specified
Category
AI Voice Generators
FAQ
Common questions
Does Cartesia support real-time voice agents?
Yes. Cartesia positions Sonic TTS, Ink STT, and Line voice agents as a real-time voice stack, with pricing that separates model credits from metered agent minutes and telephony costs.
Can Cartesia clone voices?
Cartesia supports instant voice cloning on its self-serve plans and professional voice cloning on higher plans, with official terms requiring rights and consent for cloned voices.
Is Cartesia only an API?
No. Cartesia is developer-led and API-first, but it also offers a web workspace and developer console for account, voice, and agent workflows.
Does Cartesia allow commercial use?
Cartesia lists commercial use as included on paid self-serve plans. Enterprise use cases that need custom deployment, compliance, or high volume should verify terms with sales.
Recent updates
Changelog snapshot
feature
May 4, 2026sonic-3.5-2026-05-04Cartesia documented a stable Sonic 3.5 TTS snapshot for production use alongside its broader Sonic 3.5 and Ink 2 real-time voice stack launch.
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Read profileDecision rail
Keep the key facts, primary action, and section jumps visible while you evaluate the profile.
Visit Official Site
Last verified June 24, 2026
- Pricing
- From $5/mo + usage
- Platforms
- Web
- Access
- Web app, API, SDK, Developer console
- Best for
- Real-time voice agents and conversational audio products and Low-latency TTS APIs for interactive apps and Consent-based voice cloning and localized speech and Developer-owned voice stacks that combine TTS, STT, and agent minutes
- Category
- AI Voice Generators
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Navigation
Tool cluster
Related pages
Open related pages for pricing, reviews, and adjacent coverage.
Review: Cartesia Review: Real-Time Voice API for Low-Latency AI SpeechCartesia is a strong real-time voice API platform for teams building Sonic TTS, Ink transcription, voice cloning, localization, and Line agents with low-latency requirements.Pricing: Cartesia Pricing: Credits, TTS Minutes, Agents and API BoundariesCartesia pricing mixes monthly credits, included TTS and STT usage, prepaid Line agent dollars, metered agent minutes, concurrency limits, and enterprise routes.
Reference page
Standalone reference page and update history for this tool.
Same category
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ToolElevenLabsRealistic AI voice generation, dubbing, voice cloning, and speech APIs for creators, teams, and developers.ToolResemble AIProgrammable voice cloning, speech generation, and deepfake detection for safety-minded teams.ToolTypecastAI character voices and lightweight narration for creator video workflows.ToolWellSaidEnterprise-ready AI voiceover studio for brand-safe narration, training, and team workflows.
Reference links