⚡Stack Radar

Speech & Voice Models · Reviewed 22 Oct 2026

Cartesia

Real-time AI voice platform for speech, agents, and dubbing.

from $5 · free tier · cartesia.ai ↗

Paid against free › Speech & Voice Models › Cartesia

1.2MEstimated total trafficModeled monthly visits950Ranking keywordsPublic search sample98/100Technical health15 pages checked0Referring domainsLive backlink summary

Overview

01

Summary

The useful answer before the supporting detail.

Cartesia is an AI voice platform offering text-to-speech, speech-to-text, voice cloning, dubbing, and managed voice agents S1. It serves developers and businesses needing realistic, low-latency voice interactions, from voiceovers to phone agents S23. Its practical value lies in a unified API and playground for building and deploying voice experiences S11.

02

Product identity and positioning

Name, category, positioning, audience, and first-party claims.

  • Identity: Cartesia is an AI voice platform offering text-to-speech, speech-to-text, and voice agents S1.
  • Core purpose: It solves the problem of creating natural, real-time voice interactions for applications S1.
  • Intended users: Developers and businesses building voice-enabled products S11.
  • Product scope: A platform with Sonic TTS, Ink STT, and Managed Agents, plus tools for dubbing and cloning S1.
  • Positioning: Cartesia positions itself as building the next generation of interactive AI S1.
  • Claimed distinction: Its models are ranked #1 in Artificial Analysis's Speech Arena S16.
03

Use cases and audiences

Who the product serves and the jobs it is designed to handle.

AudiencePractical use case
Content creatorsGenerate voiceovers for videos, courses, and ads S16.
Game developersCreate character dialogue from scripts S27.
Customer support teamsAutomate phone calls and provide spoken responses S27.
Logistics companiesTurn shipment updates into spoken messages S27.
Localization teamsGenerate voice tracks for translated scripts S27.

Features

09

Features and capabilities

Core functions and evidence-backed product capabilities.

CapabilityWhat it does
Text-to-speechGenerates realistic speech from text in 44 languages via Sonic S27.
Voice cloningCreates a reusable voice from a 10-second recording S11.
AI dubbingTurns translated scripts into voice tracks with native accents S11.
Voice agentsBuilds AI phone agents that answer calls and dial lists S23.
Voice enhancementRefines pronunciation, pacing, and delivery of generated speech S27.
Speech-to-textTranscribes speech with Ink S1.
10

Integrations and ecosystem

Connected products, exports, APIs, and workflow compatibility.

Integration or interfaceTypeWhat it enables
Text-to-speech APIAPIGenerates speech in WAV, MP3, or raw audio for apps S11.
Agents APIAPIBuilds and deploys voice agents with instructions and tools S23.
TwilioIntegrationImports existing phone numbers and routes calls S23.
SIP trunkIntegrationConnects carrier-provided phone numbers S23.
WebSocketAPIStreams audio in real-time for low-latency playback S23.
Python SDKSDKGenerates and saves speech in Python applications S36.

Pricing

11

Pricing and plans

Published plans, free access, trials, credits, and pricing limitations.

Plan or offerVerified price and billingIncludedLimits
Free$0 per month20K credits (~27 TTS minutes) per month, $1 prepaid agent usage2 concurrent requests; no instant cloning S1
Pro$5 per month100K credits (~133 TTS minutes) per monthCommercial licence, instant voice cloning S1
Startup$49 per month1.25M credits (~1,667 TTS minutes) per month2 professional voice clones S1
Scale$299 per month8M credits (~10,667 TTS minutes) per month4 professional voice clones, 15 concurrent requests S1
EnterpriseCustomCustomDPAs and BAAs, SSO, custom concurrency S1

Competition

12

Competitive landscape

Domains competing for the same organic search demand.

Sampled competitors

CompetitorFirst-page appearancesSampled queriesAverage positionQueries observed
docs.cartesia.ai215.5cartesia ai
github.com111cartesia ai
linkedin.com112cartesia
voiceaispace.com112cartesia ai
crusoe.ai113cartesia
x.com114cartesia
fortune.com114cartesia ai
finance.yahoo.com115cartesia
smallest.ai115cartesia ai
crunchbase.com116cartesia

Website intelligence — Collected evidence

Customers, testimonials, and first-party review claims

No supporting public-page evidence was collected for this category.

Independent review sources discovered

PlatformStatusDiscovered source
Googlediscovered_not_scrapedhttps://www.google.com/search?udm=50&q=Explain%20what%20Cartesia%20does%2C%20its%20main%20products%2C%20and%20who%20they%20are%20for.%20Use%20https%3A%2F%2Fwww.cartesia.ai%2F%20and%20https%3A%2F%2Fdocs.cartesia.ai%2F%20as%20sources.%20Summarize%20the%20capabilities%20and%20link%20to%20relevant%20documentation.
13

AI visibility

Measured ChatGPT and Google AI mentions with cited sources.

AI-assistant referral traffic

  • Estimated current generative-AI referral share: 1.5%
MonthSource
—All AI assistants
—All AI assistants
—All AI assistants

Website intelligence — Collected evidence

Site-stated AI capabilities

Page typeEvidenceSource
otherCartesia builds real-time voice AI: production voice agents, lifelike text-to-speech, and accurate speech-to-text in 44 languages.https://www.cartesia.ai/
features2X Solutions builds compliant, production-grade voice AI that automates high-volume customer calls end to end — outbound, inbound, qualifying, and booking — for lead-heavy businesses.https://www.cartesia.ai/customers/2x-solutions
features2X builds compliant, production-grade conversational voice AI for lead-heavy B2B and B2C businesses. The core problem they solve is simple: businesses are losing revenue and burning payroll because they can’t reliably get to every lead or call in real-time. 2X automates these high-volume customer conversations end-to-end: outbound calling, answering inbound, qualifying and booking, routing, and following up. Their customers span home services, legal, healthcare, tax, and financial services. In these industries, speed-to-lead and call coverage drive revenue directly.https://www.cartesia.ai/customers/2x-solutions
featuresUnder FCC/FTC frameworks, the Telephone Consumer Protection Act (TCPA) considers an outbound call “abandoned” if the person answers and isn’t connected to a representative within two seconds of their completed greeting. Campaigns are measured against a 3% maximum abandonment rate over a 30-day period. Fines run $500 to $1,500 per call. For platforms making hundreds of thousands of calls daily, non-compliance is a real litigation and financial risk. And most voice AI providers aren’t built to clear the bar.https://www.cartesia.ai/customers/2x-solutions
features2X Solutions Founder Kevin DeMeritt knows the problem firsthand. He spent 37 years running Lear Capital, a precious metals firm that processed nearly $4 billion in business through hundreds of thousands of leads. When he tried adopting voice AI from another provider, the experience was a wake-up call: no TCPA compliance, no security infrastructure, no way to operate at scale without exposing the business to lawsuits. So he built 2X to solve the problem himself.https://www.cartesia.ai/customers/2x-solutions
features> Some people have gone to salespeople and said: hey, can I talk to Mary? She was so nice. And that was actually the AI. The voices make a difference in that first moment. It’s the first impression for our company.https://www.cartesia.ai/customers/2x-solutions
featuresAI phone agent for inbound and outbound callshttps://www.cartesia.ai/product/ai-phone-agent
featuresBuild responsive AI voice agents for any use case.https://www.cartesia.ai/product/ai-phone-agent
featuresCreate expressive, relatable AI avatars for any use case.https://www.cartesia.ai/product/ai-phone-agent
featuresYes. One API request names the agent, the number to call from, and the numbers to call. The single-call endpoint dials immediately and rejects numbers beyond how many calls your account can run at once; for larger lists, batch calling queues up to 5,000 numbers and dials them as capacity frees up. For outbound sales, see AI cold calling.https://www.cartesia.ai/product/ai-phone-agent
featuresCan AI answer phone calls for my business?https://www.cartesia.ai/product/ai-phone-agent
featuresAgent calls cost $0.06 per minute, plus $0.014 per minute when the call runs on a Cartesia number. Calls on a Twilio or SIP number bill at your provider's rates instead, and your LLM's tokens bill at the model's listed prices (LLMs). The free plan includes $1 of agent calls a month (16 minutes at the calling rate); see pricing for every plan.https://www.cartesia.ai/product/ai-phone-agent
featuresTry Cartesiahttps://www.cartesia.ai/customers/2x-solutions
featuresBlogFree toolsCompareStartupsDocshttps://www.cartesia.ai/customers/2x-solutions
featuresSign inContact Saleshttps://www.cartesia.ai/customers/2x-solutions
features2X Solutions Builds Secure, TCPA-Compliant Voice AI with Cartesiahttps://www.cartesia.ai/customers/2x-solutions
features2X Solutionshttps://www.cartesia.ai/customers/2x-solutions
features2X Solutions builds compliant, production-grade voice AI that automates high-volume customer calls end to end — outbound, inbound, qualifying, and booking — for lead-heavy businesses.https://www.cartesia.ai/customers/2x-solutions
featuresStart building freehttps://www.cartesia.ai/customers/2x-solutions
features2X builds compliant, production-grade conversational voice AI for lead-heavy B2B and B2C businesses. The core problem they solve is simple: businesses are losing revenue and burning payroll because they can’t reliably get to every lead or call in real-time. 2X automates these high-volume customer conversations end-to-end: outbound calling, answering inbound, qualifying and booking, routing, and following up. Their customers span home services, legal, healthcare, tax, and financial services. In these industries, speed-to-lead and call coverage drive revenue directly.https://www.cartesia.ai/customers/2x-solutions

These are first-party product claims, not independent measurements of AI-search visibility.

14

Marketing opportunities

Actions calculated directly from the collected evidence.

OpportunityRecommended actionEvidence
Competitor gapReview the sampled queries where docs.cartesia.ai appears.2 first-page appearances across cartesia ai

Website intelligence — Collected evidence

Website evidence gaps

  • integrations: no usable public page was collected; verify whether the site publishes this evidence.
  • customers: no usable public page was collected; verify whether the site publishes this evidence.
  • reviews: no usable public page was collected; verify whether the site publishes this evidence.
  • changes: no usable public page was collected; verify whether the site publishes this evidence.
  • identity: no usable public page was collected; verify whether the site publishes this evidence.
  • technical: no usable public page was collected; verify whether the site publishes this evidence.

Trust and proof

15

Customers, proof, and reviews

Published proof, customer signals, and review evidence.

Independent reviews

PlatformPageHow it was foundNote
Product HuntCartesia Sonic Reviews (2026) / Product HuntGrounded web search### The community submitted 24 reviews to tell us what they like about Cartesia Sonic, what Cartesia Sonic can do better, and more. ... Reviewers mostly praise Cartesia Sonic for one thing: fast, natural speech that works well in real-time use. The lone user review says it is easy to integrate and notably low latency. Founder feedback from makers of MindPal, Guideless, and Toby adds recurring detail: responsive voice output, strong voice quality, useful multilingual options, and a quality-to-cos
FeaturedCustomers65 Cartesia Customer Reviews & References / FeaturedCustomersGrounded web searchRead 26 Cartesia reviews and testimonials from customers, explore 31 case studies and customer success stories, and watch 8 customer videos to see why companies chose Cartesia as their Speech Recognition Software ... Customer Rating Review Score based on 653 reference ratings 4.8/5.0 (653)
featuredcustomers.com26 Cartesia Customer Reviews & References / FeaturedCustomersGrounded web searchhas always been where communities form - from my generation's World of Warcraft and Runescape to today's Roblox and Minecraft. As games evolve into social platforms, ... need to feel genuinely human in both their responsiveness and emotional depth.

Customer proof

Proof typeNamed customer or sourceEvidence
Case studyEliseAIcustomer case study — EliseAI unlocks personalization and access for 5M+ monthly voice calls How EliseAI tunes Cartesia voices by region and language across 5M+ monthly calls in housing and ... (Customers / Cartesia)
Case study11xcustomer case study — ### 11x achieves human-like, low-latency AI voice agents with Cartesia 11x Keith Fearon Head of Product & Growth ### AimAI achieves ultra-realistic, low-latency voice AI with Cartesia AimAI Albert Kim Co-founder & CEO (Cartesia B2B Case Studies & Customer Successes)
Case studyLorikeetcustomer case study — Lorikeet evaluated multiple voice platforms against four criteria they needed: low latency for fast and realistic response times, reliability at scale to handle concurrent calls, voice quality to adapt to human speech… (Lorikeet's AI Concierge Resolves Complex Customer Issues with Cartesia / Cartesia)

Independent mentions

  • Cartesia Sonic's Text to Speech Generator / Hacker News — A recruiter contacted me about potentially interviewing at this company, which was founded by the state space modelers who created Mamba. I was pleasantly surprised to see that their text to speech service is actually better than ElevenLabs.io!
  • I work at Cartesia, which operates a TTS API similar to Play 1 . I’d be willing... — I work at Cartesia, which operates a TTS API similar to Play 1 . I’d be willing... / Hacker News ... I work at Cartesia, which operates a TTS API similar to Play 1 . I’d be willing to venture a guess and say that our TTS model, Sonic, is probably SoTA for on-device, but don't quote me on that claim. It's the same model that powers our API. ... Sonic can be run on a MacBook Pro. Our API sounds better, of course, since that's running the model on GPUs without any special tricks like quantization

External links were grounded in one live web search. Search snippets are leads, not independently scraped page content; rejected links remain available in Review evidence.

16

Company, security, and trust

Ownership, policies, security signals, and public trust evidence.

SignalFindingSource
Company and ownershipOur team has pioneered breakthrough AI architectures, including state space models (SSMs), Mamba & H-Nets. Our research manifests our mission — we architect AI that learns from and interacts with the world like humans dosource
Contact and supportCartesia-provisioned phone numberssource
Legal and privacyIt depends on rights. You need rights to the video and script, consent from anyone whose voice you clone, and a commercial-use license, which Cartesia's paid plans include. Read the terms of service and acceptable use posource
Security and complianceThe same models and agents across cloud, on-premise, and on-device. Inference runs in-region — keeping you within your latency envelope, data residency obligations, and compliance frameworks.source
Uptime and status pageDeploy via regional API endpoints across the globe — ensuring in-region processing, high availability, and the uptime your production systems demand.source
Domain registered2023-05-10—
Domain expires2027-05-10—

Every trust signal above is backed by a collected page or a registration record.

17

Documentation and product updates

Help resources, product guidance, and visible changes over time.

Not established in the collected sources.

Technical

18

Technical and delivery signals

Delivery model, platforms, API, data ownership, reliability claims and release activity.

SignalFindingSource
Delivery model (cloud, self-hosted, desktop, browser extension)Cloud-based platform with API and Playground S11.S11
Platforms and appsWeb-based Playground and API S20.S20
API and extensibility (API, SDK, webhooks, MCP, plugins)Offers API, Python SDK, and WebSocket streaming S36 S23.S36 S23
Data ownership and exportNot published on the collected pages.—
Performance and reliability claimsFirst audio in under 90ms S36.S36
Release activityNot published on the collected pages.—
19

Measured infrastructure

Domain, certificate, and hosting signals, measured directly.

SignalFinding
Domain registered2023-05-10 — NameCheap, Inc.
Domain expires2027-05-10
TLS certificateLet's Encrypt, valid, expires 2027-01-16
Security headersHSTS
Headers not servedCSP, X-Content-Type-Options, X-Frame-Options, Referrer-Policy
Server headerVercel
Mail handled bysmtp.google.com
Nameserversns1.vercel-dns.com, ns2.vercel-dns.com

Not measurable: wayback: rate limited by archive.org, ladder stopped after 1 probe(s). A gap here means the lookup was unavailable, not that the finding is negative.

20

Technical site audit

A bounded multi-page crawl with page-level issues and URLs.

Scout — Bounded technical crawl

  • Pages crawled: 15 of 15 maximum
  • Technical health: 98/100
  • Critical issues: 0
  • Warnings: 4
  • Notices: 6

Issues

SeverityIssueValueAffected URL
noticeImages are missing alt text1https://www.cartesia.ai/
noticeImages are missing alt text1https://www.cartesia.ai/
noticeMeta description length should be reviewed48https://www.cartesia.ai/customers
noticeMeta description length should be reviewed49https://www.cartesia.ai/contact
noticeMeta description length should be reviewed40https://www.cartesia.ai/ink
noticeImages are missing alt text1https://www.cartesia.ai/blog
warningDuplicate title in audit sample2https://www.cartesia.ai/
warningDuplicate title in audit sample2https://www.cartesia.ai/
warningDuplicate meta description in audit sample2https://www.cartesia.ai/
warningDuplicate meta description in audit sample2https://www.cartesia.ai/

Crawled pages

StatusTitleH1sWordsResponseURL
200Realtime AI models and voice agents \Cartesia1634220 ms
200Realtime AI models and voice agents \Cartesia1634592 ms
200AI Voices \Cartesia1670369 ms
200Multilingual voice AI for a global presence \Cartesia1535178 ms
200Customers \Cartesia11303317 ms
200Pricing: free plan, TTS, STT, and voice agents \Cartesia11505517 ms
200Contact sales \Cartesia128997 ms
200Sonic AI voice: real-time TTS API with emotion \Cartesia11163673 ms
200Ink: Streaming Speech-to-Text API \Cartesia11435164 ms
200AI voice agent builder \Managed Agents \Cartesia1479
200Blog \Cartesia1140625 ms
200Free AI Voice Tools \Cartesia1730155 ms
200Compare voice AI and text-to-speech platforms \Cartesia11389170 ms
200Startup grant \12 months of voice AI \Cartesia11252
200Company \Cartesia1599137 ms

This is a bounded Scout crawl. Core Web Vitals and Lighthouse scores are not claimed unless a dedicated performance audit is connected.

21

Search Console and Analytics

First-party search and behavioral data connection state.

Modeled acquisition channels

ChannelEstimated share
direct47.1%
search35.6%
search organic28.7%
search paid6.9%
social5.7%
social organic5.6%
social paid0.1%
referrals5.7%
paid referrals3.4%
mail1.0%
gen ai1.5%
affiliate0.0%
other0.0%

First-party connections

IntegrationStatusData available after connection
Google Search ConsoleNot connectedClicks, impressions, CTR, average position, queries, pages, countries, and devices
Google AnalyticsNot connectedOrganic sessions, engagement, landing pages, conversions, geography, and devices

No first-party Search Console or Analytics numbers are shown until the site owner authorizes the corresponding Google account. Scout traffic model values above are modeled estimates, not private analytics totals.

Limits and method

22

Limitations and open questions

Known constraints and missing evidence from the collected pages.

The collected pages do not mention specific competitors. Evidence gaps include lack of customer case studies, detailed security certifications, and uptime statistics. Pricing details for agent usage beyond the free tier are not fully specified.

23

Sources, method, and limitations

Evidence inventory, collection method, provider use, and constraints.

This report is based on 15 collected pages from cartesia.ai, including product pages and company information. External proof search was used to verify the Speech Arena ranking. Limitations: no third-party reviews or detailed customer testimonials were collected.

Paid against free, in your inbox

One job at a time: the paid tools worth paying for, the free ones you can run yourself, and who should pick which.

No tracking pixels. One click to leave. We use your address to send Stack Radar and nothing else. Privacy.