kitio.aiCartesia Sonic vs Acoust
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Cartesia Sonic has the lower starting price: about $5 a month, against $9 for Acoust.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Real-time speech under 90ms
- 44 languages
- Instant voice cloning
- Emotion and laughter control
- Voice localisation
- 100+ AI voices in 30+ languages
- Voice cloning from a short sample
- Tone and emotion controls
- SRT subtitle export
- AI clips from long videos
- Built-in video editor
| Feature | Cartesia Sonic | Acoust |
|---|---|---|
| Best for | Low-latency text-to-speech API for voice agents | AI voice generator with voice cloning and a built-in video editor |
| Category | Audio & voice | Audio & voice |
| Pricing model | Freemium | Freemium |
| Starting price | $5/mo | $9/mo |
| Free plan | Yes | Yes |
| Made by | Cartesia | Acoust |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Cartesia Sonic has the lower starting price: about $5 a month, against $9 for Acoust.
Free plan
Cheapest paid plan
Top plan
Free trial
5 plans
Free
Free
- 20K credits per month
- Text to speech and speech to text
- $1 of prepaid voice agent usage
Pro
$5/mo
- 100K credits per month
- Commercial use license
- Instant voice cloning
Startup
$49/mo
- 1.25M credits per month
- Professional voice cloning
- $49 of prepaid agent usage
Scale
$299/mo
- 8M credits per month
- Priority support
- High concurrency limits
Enterprise
Contact sales
- Custom credits and volume pricing
- SSO and DPAs
- Shared Slack channel
4 plans
Personal
Free
- 10K credits
- Not for commercial use
Pro
$9/mo
- 180K credits per month
- Up to 180 voice minutes
- Up to 90 cloning minutes
- SRT subtitles and commercial use
Premium
$29/mo
- 600K credits per month
- Up to 600 voice minutes
- AI Clips
- 60 minutes of transcription
Enterprise
Contact sales
- Team accounts with pooled credits
- SSO
- Custom quotas
Prices in USD, checked Oct 29, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Cartesia Sonic
- Very fast time to first audio
- Wide language coverage in one model
- Cloning from ten seconds of audio
- Aimed at developers more than casual users
- Credit system takes a while to understand
- Commercial license needs a paid plan
Acoust
- Free plan with 10K credits
- Voice clone works across languages
- Low entry price for commercial use
- Free plan excludes commercial use
- Voice and cloning minutes are capped monthly
- AI Clips is still in beta
Which one should you choose?
Choose Cartesia Sonic if you want:
- Very fast time to first audio
- Wide language coverage in one model
- Cloning from ten seconds of audio
Watch out: aimed at developers more than casual users.
Choose Acoust if you want:
- Free plan with 10K credits
- Voice clone works across languages
- Low entry price for commercial use
Watch out: free plan excludes commercial use.
Cartesia Sonic vs Acoust FAQ
What is the difference between Cartesia Sonic and Acoust?
Cartesia Sonic: Low-latency text-to-speech API for voice agents. Acoust: AI voice generator with voice cloning and a built-in video editor. Both are audio & voice tools.
Is Cartesia Sonic or Acoust cheaper?
Cartesia Sonic has the lower starting price: about $5 a month, against $9 for Acoust.
Do Cartesia Sonic and Acoust have free plans?
Cartesia Sonic: Yes. Acoust: Yes.
Who makes Cartesia Sonic?
Cartesia Sonic is made by Cartesia, based in United States.
Who makes Acoust?
Acoust is made by Acoust.
Which should I choose, Cartesia Sonic or Acoust?
Choose Cartesia Sonic if you value very fast time to first audio and wide language coverage in one model. Choose Acoust if you value free plan with 10k credits and voice clone works across languages.