kitio.aiKaldi vs Vivoka
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Kaldi is completely free, while Vivoka is paid.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Acoustic model training
- WFST-based decoding
- Recipes for public datasets
- Feature extraction tools
- Pretrained model downloads
- On-device speech recognition
- Voice Development Kit
- Neural ASR from Cerence
- License and project hub
- Voice-directed workflows
| Feature | Kaldi | Vivoka |
|---|---|---|
| Best for | Open-source toolkit for building speech recognition systems | Embedded voice AI SDK for logistics, medtech and field devices |
| Category | Audio & voice | Audio & voice |
| Pricing model | Free | Paid |
| Starting price | Free | See pricing page |
| Free plan | Yes, fully free | No |
| Made by | Daniel Povey and Kaldi contributors | Vivoka |
| Based in | – | France |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Kaldi is completely free, while Vivoka is paid.
Free plan
Cheapest paid plan
Top plan
Free trial
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
Kaldi
- Free under a permissive license
- Full control over the speech pipeline
- Long track record in research
- Steep learning curve for newcomers
- Few pretrained models on the site
- Needs your own servers and training data
Vivoka
- Runs offline on the device
- Built for industrial and medical use
- Documented SDK for developers
- Pricing only through sales
- Needs developers to integrate
- Not a ready-made end-user app
Which one should you choose?
Choose Kaldi if you want:
- Free under a permissive license
- Full control over the speech pipeline
- Long track record in research
Watch out: steep learning curve for newcomers.
Choose Vivoka if you want:
- Runs offline on the device
- Built for industrial and medical use
- Documented SDK for developers
Watch out: pricing only through sales.
Kaldi vs Vivoka FAQ
What is the difference between Kaldi and Vivoka?
Kaldi: Open-source toolkit for building speech recognition systems. Vivoka: Embedded voice AI SDK for logistics, medtech and field devices. Both are audio & voice tools.
Is Kaldi or Vivoka cheaper?
Kaldi is completely free, while Vivoka is paid.
Do Kaldi and Vivoka have free plans?
Kaldi: Yes, fully free. Vivoka: No.
Who makes Kaldi?
Kaldi is made by Daniel Povey and Kaldi contributors.
Who makes Vivoka?
Vivoka is made by Vivoka, based in France.
Which should I choose, Kaldi or Vivoka?
Choose Kaldi if you value free under a permissive license and full control over the speech pipeline. Choose Vivoka if you value runs offline on the device and built for industrial and medical use.