kitio.aiSoniox vs Voicegain
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Soniox starts at See pricing page 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 and async transcription
- 60+ languages
- Speaker diarization
- Mid-sentence language switching
- Agent echo cancellation
- Python and Node SDKs
- Batch and streaming STT
- Speech analytics API
- Telephony voice bots
- MRCP ASR for IVR
- On-premises deployment
- HIPAA-compliant cloud
| Feature | Soniox | Voicegain |
|---|---|---|
| Best for | Multilingual speech-to-text API for voice agents and transcription | Speech-to-text APIs and voice agents you can run on-premises |
| Category | Audio & voice | Audio & voice |
| Pricing model | Paid | Freemium |
| Starting price | See pricing page | See pricing page |
| Free plan | No | Yes |
| Made by | Soniox | Voicegain |
| Based in | – | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Soniox starts at See pricing page and Voicegain starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Async speech-to-text
$0.10 / hour
- File transcription
- Token-based billing
Real-time speech-to-text
$0.12 / hour
- Streaming transcription
- Same model as async
Text-to-speech
$0.70 / hour
- Generated speech
- Token-based billing
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 Nov 5, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Soniox
- Very low price per hour
- Strong multilingual support
- Features designed for voice agents
- Token-based billing takes some math
- Developer API, not a finished app
- Advanced features need integration work
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 Soniox if you want:
- Very low price per hour
- Strong multilingual support
- Features designed for voice agents
Watch out: token-based billing takes some math.
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.
Soniox vs Voicegain FAQ
What is the difference between Soniox and Voicegain?
Soniox: Multilingual speech-to-text API for voice agents and transcription. Voicegain: Speech-to-text APIs and voice agents you can run on-premises. Both are audio & voice tools.
Is Soniox or Voicegain cheaper?
Soniox starts at See pricing page and Voicegain starts at See pricing page. Check both pricing pages for current plans.
Do Soniox and Voicegain have free plans?
Soniox: No. Voicegain: Yes.
Who makes Soniox?
Soniox is made by Soniox.
Who makes Voicegain?
Voicegain is made by Voicegain, based in United States.
Which should I choose, Soniox or Voicegain?
Choose Soniox if you value very low price per hour and strong multilingual support. Choose Voicegain if you value cloud, vpc or on-premises options and $50 free credit without a sales call.