kitio.aiCartesia Sonic vs Voicegain
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Cartesia Sonic starts at $5/mo and Voicegain 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
- Batch and streaming STT
- Speech analytics API
- Telephony voice bots
- MRCP ASR for IVR
- On-premises deployment
- HIPAA-compliant cloud
| Feature | Cartesia Sonic | Voicegain |
|---|---|---|
| Best for | Low-latency text-to-speech API for voice agents | Speech-to-text APIs and voice agents you can run on-premises |
| Category | Audio & voice | Audio & voice |
| Pricing model | Freemium | Freemium |
| Starting price | $5/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | Cartesia | Voicegain |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Cartesia Sonic starts at $5/mo and Voicegain 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
3 plans
Free to start
Free
- $50 platform credit
- All cloud APIs
- No credit card needed
Cloud
$0.0002 / sec
- Batch and streaming STT
- Speech analytics and bot APIs
On-premises
Contact sales
- For regulated industries
- Runs in your own environment
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
Voicegain
- Cloud, VPC or on-premises options
- $50 free credit without a sales call
- Works with legacy IVR through MRCP
- Packaged suite only for healthcare payers
- Building agents takes developer work
- Per-second billing can be hard to forecast
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 Voicegain if you want:
- Cloud, VPC or on-premises options
- $50 free credit without a sales call
- Works with legacy IVR through MRCP
Watch out: packaged suite only for healthcare payers.
Cartesia Sonic vs Voicegain FAQ
What is the difference between Cartesia Sonic and Voicegain?
Cartesia Sonic: Low-latency text-to-speech API for voice agents. Voicegain: Speech-to-text APIs and voice agents you can run on-premises. Both are audio & voice tools.
Is Cartesia Sonic or Voicegain cheaper?
Cartesia Sonic starts at $5/mo and Voicegain starts at See pricing page. Check both pricing pages for current plans.
Do Cartesia Sonic and Voicegain have free plans?
Cartesia Sonic: Yes. Voicegain: Yes.
Who makes Cartesia Sonic?
Cartesia Sonic is made by Cartesia, based in United States.
Who makes Voicegain?
Voicegain is made by Voicegain, based in United States.
Which should I choose, Cartesia Sonic or Voicegain?
Choose Cartesia Sonic if you value very fast time to first audio and wide language coverage in one model. Choose Voicegain if you value cloud, vpc or on-premises options and $50 free credit without a sales call.