kitio.aiCartesia Sonic vs Omni Voice
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Cartesia Sonic starts at $5/mo and Omni Voice starts at See pricing page. Check both pricing pages for current plans.
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
- 458 studio voices
- Private voice cloning
- Voice design
- Speech to text
- Generation history
| Feature | Cartesia Sonic | Omni Voice |
|---|---|---|
| Best for | Low-latency text-to-speech API for voice agents | Text to speech with hundreds of voices, cloning and voice design |
| Category | Audio & voice | Audio & voice |
| Pricing model | Freemium | Freemium |
| Starting price | $5/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | Cartesia | Omni Voice |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Cartesia Sonic starts at $5/mo and Omni Voice starts at See pricing page. Check both pricing pages for current plans.
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
Free
Free
- 120 characters per generation
- 15 welcome credits
Basic
$4.95/mo billed yearly
- 960,000 TTS characters a year
- 9,600 voice credits
Pro
$14.95/mo billed yearly
- 4.2M TTS characters a year
- 42,000 voice credits
- Priority help
Enterprise
$24.95/mo billed yearly
- 9.6M TTS characters a year
- 96,000 voice credits
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
Omni Voice
- Large voice library
- Cloning and design in one place
- Free tier to test voices
- Free generations capped at 120 characters
- Monthly-billed prices not shown
- Credit system is complex
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 Omni Voice if you want:
- Large voice library
- Cloning and design in one place
- Free tier to test voices
Watch out: free generations capped at 120 characters.
Cartesia Sonic vs Omni Voice FAQ
What is the difference between Cartesia Sonic and Omni Voice?
Cartesia Sonic: Low-latency text-to-speech API for voice agents. Omni Voice: Text to speech with hundreds of voices, cloning and voice design. Both are audio & voice tools.
Is Cartesia Sonic or Omni Voice cheaper?
Cartesia Sonic starts at $5/mo and Omni Voice starts at See pricing page. Check both pricing pages for current plans.
Do Cartesia Sonic and Omni Voice have free plans?
Cartesia Sonic: Yes. Omni Voice: Yes.
Who makes Cartesia Sonic?
Cartesia Sonic is made by Cartesia, based in United States.
Who makes Omni Voice?
Omni Voice is made by Omni Voice.
Which should I choose, Cartesia Sonic or Omni Voice?
Choose Cartesia Sonic if you value very fast time to first audio and wide language coverage in one model. Choose Omni Voice if you value large voice library and cloning and design in one place.