kitio.aiCartesia Sonic vs Audyo
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 $15 for Audyo.
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
- Link to audio
- Branded embeddable players
- Pronunciation controls
- Paywall settings
- Listening analytics
- Developer API
| Feature | Cartesia Sonic | Audyo |
|---|---|---|
| Best for | Low-latency text-to-speech API for voice agents | Turns published posts into human-quality audio with branded players |
| Category | Audio & voice | Audio & voice |
| Pricing model | Freemium | Freemium |
| Starting price | $5/mo | $15/mo |
| Free plan | Yes | Yes |
| Made by | Cartesia | Audyo |
| 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 $15 for Audyo.
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
2 plans
Free
Free
- 30 minutes of audio per month
- Every voice
- Embeds and MP3 downloads
Pro
$15/mo
- 5 hours of audio per month
- Music and background tracks
- Custom player colors
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
Audyo
- Free tier with every voice
- Pronunciation checks before release
- Works without a reader app
- Free plan limited to 30 minutes a month
- Music and uploads only on Pro
- Built for written posts, not books
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 Audyo if you want:
- Free tier with every voice
- Pronunciation checks before release
- Works without a reader app
Watch out: free plan limited to 30 minutes a month.
Cartesia Sonic vs Audyo FAQ
What is the difference between Cartesia Sonic and Audyo?
Cartesia Sonic: Low-latency text-to-speech API for voice agents. Audyo: Turns published posts into human-quality audio with branded players. Both are audio & voice tools.
Is Cartesia Sonic or Audyo cheaper?
Cartesia Sonic has the lower starting price: about $5 a month, against $15 for Audyo.
Do Cartesia Sonic and Audyo have free plans?
Cartesia Sonic: Yes. Audyo: Yes.
Who makes Cartesia Sonic?
Cartesia Sonic is made by Cartesia, based in United States.
Who makes Audyo?
Audyo is made by Audyo.
Which should I choose, Cartesia Sonic or Audyo?
Choose Cartesia Sonic if you value very fast time to first audio and wide language coverage in one model. Choose Audyo if you value free tier with every voice and pronunciation checks before release.