Azure AI Speech vs Cartesia (2026): which should you pick?
As of Nov 12, 2026, Cartesia grades higher than Azure AI Speech: 2.4 against 2.2 out of 4.0.
Checked Nov 9, 2026 and Nov 12, 2026 · graded Nov 9, 2026 and Nov 12, 2026 by ToolGPA
Azure AI Speech grades higher on the free plan. Cartesia grades higher on value for money and ease of use. They get the same grade on features and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Azure AI Speech
Microsoft speech API for text to speech, transcription and translation
Cartesia
Low-latency speech models and voice agents for developers
Which one is for you
Pick Azure AI Speech if
- Fits if you already build on Azure and want speech in the same bill
- Works for developers who need transcription, translation and speech output from one vendor
Look elsewhere if
- Not for you if you want an editor to paste a script into, because it's an API and console service
- Tight if you plan custom voices, since access is limited and training and endpoint hosting cost extra
- Watch out: prices follow the region you pick and are labelled estimates that vary by agreement and currency
- Watch out: the product was renamed to Azure Speech in Foundry Tools, so older docs and tutorials use the earlier name
Pick Cartesia if
- Fits if you're building a voice agent or phone bot through an API
- Works for developers who want speech and transcription from one API
Look elsewhere if
- Not for you if you don't write code, or want a voiceover editor or a phone app
- Skip it if you hoped to go live on the free plan, which has no commercial use license
- Tight if you leave overages off, since requests stop when credits run out
- Watch out: overages run $65 per million credits on Pro, and agent calls cost $0.03 a minute plus $0.014 on a Cartesia number
- Pricey if you need a professional voice clone, which starts on the $49 Startup plan
How we grade them
| 2.2GPAAzure AI SpeechFair | 2.4GPACartesiaFair | |
|---|---|---|
| Value for money | CNo flat plan. Neural voices run about $15 per 1M characters and Neural HD about $22 in US regions, so what you pay depends on volume and region. The free allowance is the only thing that brings it down. | BPro is $5 a month for 100,000 credits, about 133 minutes of speech, with a commercial license, instant cloning and $5 of agent calls. An hour a month fits on that plan, which is less than its alternatives charge for the same amount. Overages cost $65 per million credits on Pro. |
| Free plan and trial | BThe F0 tier gives 0.5M Neural characters a month plus 5 hours of speech to text, free. It sits behind an Azure account, so you set that up first. | C20,000 credits a month, about 27 minutes of speech, plus $1 of agent usage. Enough to try it, but there's no commercial use license, so nothing built on it can go live. |
| Features | CNeural and Neural HD voices, custom and personal voice, transcription, translation, avatars and a real-time voice API. That's the job and then some, but custom voice is limited-access and training and hosting are billed separately. | CStreaming text to speech in dozens of languages, streaming transcription, instant and professional cloning, and voice agents with phone numbers. It does the developer job fully, but that's a narrower job: there's no voiceover editor, as the listing says. |
| Ease of use | DNo store rating on record, and it's an API and console service. You write code or wire it into other Azure pieces, so this is not a start-typing tool. | CNo store rating on record. It's built for developers: you call it from code with the Python or JavaScript SDK, or try voices in a web playground. Fine if you code, slow going if you don't. |
| Platforms and integrations | BWeb and API only, with Microsoft Foundry and Azure OpenAI as the listed hooks. No desktop or phone app. | BWeb and an API with regional endpoints, plus LiveKit, Pipecat, Rasa and Genesys for voice agents, and on-premise setups through sales. No phone or desktop app. |
| Best for | speech features built on Azure | speech through an API for voice agents |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Azure AI Speech and Cartesia. How we grade
Where they differ
At a glance
| Azure AI Speech | Cartesia | |
|---|---|---|
| Pricing | Free plan | Free plan |
| Starts at | Not published | $5 per month for 100,000 credits, billed monthly |
| Free plan | Free (F0) tier: 0.5 million Neural text-to-speech characters per month, plus 5 hours of standard speech to text. | 20,000 credits a month (about 27 minutes of text to speech or 1 hour 51 minutes of speech to text) and $1 of voice agent usage. No commercial use license. |
| Free trial | None listed | None listed |
| Web | ||
| Made by | Microsoft | Cartesia |
| Price read from | azure.microsoft.com | cartesia.ai |
| Checked | Nov 12, 2026 | Nov 9, 2026 |
Worth knowing
Azure AI Speech
- Prices follow the region picked on the pricing page; Neural is about $15 per 1M characters and Neural HD about $22 in the US regions.
- Custom voice is limited-access, and training and endpoint hosting are charged separately on top of synthesis.
- Prices are described as estimates and can vary with the agreement type and currency.
- The product was renamed from Azure AI Speech to Azure Speech in Foundry Tools; older docs and tutorials use the earlier name.
Cartesia
- Cartesia is a developer platform: you use it through the API or a web playground, and there is no voiceover editor or mobile app.
- The Free plan has no commercial use license; it starts on Pro, which also adds instant cloning. Professional cloning needs Startup or above.
- Paid plans can go past their credits at $65 per million on Pro, $45 on Startup and $38 on Scale; with overages off, requests are blocked.
- Voice agent calls cost $0.03 a minute from the plan's prepaid dollars, plus $0.014 a minute on a Cartesia phone number.
Key features
Azure AI Speech
- Neural and Neural HD voices
- Prebuilt text-to-speech voices come in Neural and Neural HD variants, plus a MAI-Voice model priced alongside them.
- Custom and personal voice
- Professional custom voices are trained and hosted on Azure. Personal voice has free voice creation. Custom voice is a limited-access feature.
- Speech to text and translation
- The same service transcribes calls and meetings and translates speech, with captioning in more than 100 languages.
- Avatars
- Text-to-speech avatars (standard, photo and video) are billed per minute as an add-on to speech synthesis.
- Voice Live API
- A real-time voice agent API billed per million tokens, with pricing tiers set by the underlying language model.
Cartesia
- Sonic text to speech
- A streaming text-to-speech model built for live conversation, with dozens of languages and regional accents. One minute of audio uses about 750 to 800 credits.
- Ink speech to text
- A streaming transcription model with its own concurrency pool, so heavy transcription does not slow text to speech.
- Voice cloning
- Instant clones from 10 seconds of audio start on Pro; Professional clones start on Startup. Cartesia says to clone only your own voice or one you have explicit permission to use.
- Managed Agents
- Build voice agents that answer and make phone calls, with Cartesia-provided phone numbers, from 1 on Free to 10 on Scale.
- Deployment options
- Call the models through regional API endpoints with Python and JavaScript SDKs, or arrange on-premise, private cloud or on-device deployment with sales.
Plans
Azure AI Speech
Free (F0)$0
0.5M Neural characters a month for text to speech, 5 audio hours for speech to text and translation.
Cartesia
Free$0
20,000 credits a month, about 27 minutes of text to speech, plus $1 of prepaid agent usage. Not licensed for commercial use.
Pro$5
per month for 100,000 credits, billed monthly
About 133 minutes of text to speech a month, $5 of agent usage, a commercial use license and instant voice cloning.
Startup$49
per month for 1.25M credits, billed monthly
About 1,667 minutes of text to speech a month, $49 of agent usage and 2 Professional Voice Clone slots.
Scale$299
per month for 8M credits, billed monthly
About 10,667 minutes of text to speech a month, $299 of agent usage, 4 Professional Voice Clone slots, priority support and higher concurrency.
EnterpriseCustom
Volume pricing, custom concurrency, DPAs and BAAs, SSO, a shared Slack channel and on-premise or private cloud deployment.
Ways to pay less
Azure AI Speech
No public discounts listed.
Cartesia
- Startups
Startups Grant: 12 months of credits
Startups at any stage can apply for 12 months of Scale-level usage: 8 million credits a month plus $299 a month for Managed Agents. Students are considered case by case.
Common questions
Which is cheaper, Azure AI Speech or Cartesia?
As of Nov 12, 2026, Azure AI Speech publishes no starting price, and Cartesia starts at $5 per month for 100,000 credits, billed monthly.
Which has a free plan, Azure AI Speech or Cartesia?
As of Nov 12, 2026, both Azure AI Speech and Cartesia have a free plan.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.