kitio.aiDeepgram vs Cartesia Sonic
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Deepgram starts at See pricing page and Cartesia Sonic starts at $5/mo. 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
- Nova speech-to-text
- Real-time streaming
- Speaker diarization
- Aura text-to-speech
- Voice agent API
- Self-hosted deployment
- Real-time speech under 90ms
- 44 languages
- Instant voice cloning
- Emotion and laughter control
- Voice localisation
| Feature | Deepgram | Cartesia Sonic |
|---|---|---|
| Best for | Speech-to-text, text-to-speech and voice agent APIs for developers | Low-latency text-to-speech API for voice agents |
| Category | Audio & voice | Audio & voice |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | $5/mo |
| Free plan | Yes | Yes |
| Made by | Deepgram | Cartesia |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Deepgram starts at See pricing page and Cartesia Sonic starts at $5/mo. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Pay As You Go
$200 free credit, then usage
- All public model endpoints
- Speech-to-text from $0.0043/min
- For developers and startups
Growth
$4K+ / year
- Prepaid annual credits
- Lower per-minute rates
- For growing applications
Enterprise
Contact sales
- Large volumes and custom models
- Deployment and support options
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
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Deepgram
- Low latency for live audio
- Competitive per-minute pricing
- Self-hosting option
- Developer-only, no consumer app
- Accuracy varies by language
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
Which one should you choose?
Choose Deepgram if you want:
- Low latency for live audio
- Competitive per-minute pricing
- Self-hosting option
Watch out: developer-only, no consumer app.
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.
Deepgram vs Cartesia Sonic FAQ
What is the difference between Deepgram and Cartesia Sonic?
Deepgram: Speech-to-text, text-to-speech and voice agent APIs for developers. Cartesia Sonic: Low-latency text-to-speech API for voice agents. Both are audio & voice tools.
Is Deepgram or Cartesia Sonic cheaper?
Deepgram starts at See pricing page and Cartesia Sonic starts at $5/mo. Check both pricing pages for current plans.
Do Deepgram and Cartesia Sonic have free plans?
Deepgram: Yes. Cartesia Sonic: Yes.
Who makes Deepgram?
Deepgram is made by Deepgram, based in United States.
Who makes Cartesia Sonic?
Cartesia Sonic is made by Cartesia, based in United States.
Which should I choose, Deepgram or Cartesia Sonic?
Choose Deepgram if you value low latency for live audio and competitive per-minute pricing. Choose Cartesia Sonic if you value very fast time to first audio and wide language coverage in one model.