kitio.aiCartesia Sonic vs article2audio
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 $19 for article2audio.
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
- Image descriptions
- Table summaries
- Code explanation
- MP3 and podcast feed
- HTTP API
| Feature | Cartesia Sonic | article2audio |
|---|---|---|
| Best for | Low-latency text-to-speech API for voice agents | Article narration that describes images, tables and code aloud |
| Category | Audio & voice | Audio & voice |
| Pricing model | Freemium | Free trial |
| Starting price | $5/mo | $19/mo |
| Free plan | Yes | No, trial available |
| Made by | Cartesia | article2audio |
| 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 $19 for article2audio.
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
Writer
$19/mo
- 10 narrated posts per month
- MP3 download and podcast feed
- Extra posts $2 each
Publication
$59/mo
- 40 narrated posts per month
- HTTP API access
- Archive narration on request
More than that
Contact sales
- Over 40 posts per month
- Embedded audio player
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
article2audio
- Handles visuals other readers skip
- Podcast feed for publishers
- Priced per post, not per hour
- English only
- Just two voices
- No iOS or Android app
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 article2audio if you want:
- Handles visuals other readers skip
- Podcast feed for publishers
- Priced per post, not per hour
Watch out: english only.
Cartesia Sonic vs article2audio FAQ
What is the difference between Cartesia Sonic and article2audio?
Cartesia Sonic: Low-latency text-to-speech API for voice agents. article2audio: Article narration that describes images, tables and code aloud. Both are audio & voice tools.
Is Cartesia Sonic or article2audio cheaper?
Cartesia Sonic has the lower starting price: about $5 a month, against $19 for article2audio.
Do Cartesia Sonic and article2audio have free plans?
Cartesia Sonic: Yes. article2audio: No, trial available.
Who makes Cartesia Sonic?
Cartesia Sonic is made by Cartesia, based in United States.
Who makes article2audio?
article2audio is made by article2audio.
Which should I choose, Cartesia Sonic or article2audio?
Choose Cartesia Sonic if you value very fast time to first audio and wide language coverage in one model. Choose article2audio if you value handles visuals other readers skip and podcast feed for publishers.