kitio.aiSonix vs Hei.io
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Sonix has the lower starting price: about $25 a month, against $39 for Hei.io.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Multilingual transcription
- Transcript translation
- Speaker identification
- AI summaries and themes
- Subtitle and NLE exports
- AI voiceover and dubbing
- Auto captions and subtitles
- Voice cloning
- Custom dictionaries
- SRT and VTT import
- API access
| Feature | Sonix | Hei.io |
|---|---|---|
| Best for | Automated transcription and translation in 50+ languages | AI dubbing, voiceover and subtitles in 140+ languages |
| Category | Audio & voice | Audio & voice |
| Pricing model | Free trial | Freemium |
| Starting price | $25/mo | $39/mo |
| Free plan | No, trial available | Yes |
| Made by | Sonix | Hei.io |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Sonix has the lower starting price: about $25 a month, against $39 for Hei.io.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Pay As You Go
$10 / hour
- Transcription and translation
- 5 GB storage
- Single user
Core
$25/mo
- 5 hrs/month transcription
- 5 hrs/month AI workspace
- 25 GB storage
- 1 user, +$25 per seat
Advanced
$50/mo
- 20 hrs/month transcription
- 25 hrs/month AI workspace
- 50 GB storage
Pro
$80/mo
- 40 hrs/month transcription
- 100 hrs/month AI workspace
- 100 GB storage
- Priority support
6 plans
Free
Free
- Free trial account
- No credit card required
Pay As You Go
$12 / hour
- Minutes never expire
- Dubbing in 140+ languages
- Auto captions and subtitles
Basic
$39/mo
- 25 minutes per month
- Instant voice cloning
- Premium voices
Pro
$109/mo
- 100 minutes per month
- Multiple custom dictionaries
- Rewrite with AI
Business
$489/mo
- 500 minutes per month
- Everything in Pro
- Custom minutes available
Enterprise
Contact sales
- Custom invoices
- Custom features
- API access
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
Sonix
- Wide language support
- Pay per hour, no lock-in
- Strong export options
- Costs add up for heavy users
- Free trial is only 30 minutes
Hei.io
- Large language and voice selection
- Captions, subtitles and dubbing in one tool
- Minutes on pay as you go never expire
- Output is charged by minutes of media
- Voice cloning is not on the lowest options
- Accuracy claim is about 90%, so review is needed
Which one should you choose?
Choose Sonix if you want:
- Wide language support
- Pay per hour, no lock-in
- Strong export options
Watch out: costs add up for heavy users.
Choose Hei.io if you want:
- Large language and voice selection
- Captions, subtitles and dubbing in one tool
- Minutes on pay as you go never expire
Watch out: output is charged by minutes of media.
Sonix vs Hei.io FAQ
What is the difference between Sonix and Hei.io?
Sonix: Automated transcription and translation in 50+ languages. Hei.io: AI dubbing, voiceover and subtitles in 140+ languages. Both are audio & voice tools.
Is Sonix or Hei.io cheaper?
Sonix has the lower starting price: about $25 a month, against $39 for Hei.io.
Do Sonix and Hei.io have free plans?
Sonix: No, trial available. Hei.io: Yes.
Who makes Sonix?
Sonix is made by Sonix, based in United States.
Who makes Hei.io?
Hei.io is made by Hei.io.
Which should I choose, Sonix or Hei.io?
Choose Sonix if you value wide language support and pay per hour, no lock-in. Choose Hei.io if you value large language and voice selection and captions, subtitles and dubbing in one tool.