kitio.aiUltravox vs Hume AI
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Ultravox starts at $100/mo and Hume AI 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
- Speech-native model
- Real-time voice agents
- Outbound call scheduler
- Custom voices
- SIP support
- Expression measurement APIs
- Octave text to speech
- Empathic voice interface
- VoiceEQ evaluation platform
- Public voice model benchmarks
| Feature | Ultravox | Hume AI |
|---|---|---|
| Best for | Speech-native voice AI platform for real-time voice agents | Emotionally intelligent voice AI, expression APIs and voice evals |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Freemium |
| Starting price | $100/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | Ultravox (Inworld) | Hume AI |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Ultravox starts at $100/mo and Hume AI starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Pay as you go
$0.05 / minute
- 30 free minutes of calls
- Up to 5 concurrent calls
- Unlimited playground calls
Pro
$100/mo
- No hard concurrency caps
- Outbound call scheduler
- 5 custom voices
Enterprise
Custom
- Custom pricing
- Volume rates
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
Ultravox
- Skips the speech-to-text step
- 30 free minutes to start
- Unlimited playground calls
- Developer-focused, not a no-code tool
- Pay-as-you-go plan limits concurrent calls to 5
- Now part of Inworld, so the roadmap may shift
Hume AI
- Deep focus on tone and emotion
- Evaluation tools for voice products
- Supports 50+ languages
- Pricing not shown on the homepage
- Evaluation platform is sales-led
- Mainly for developers and AI teams
Which one should you choose?
Choose Ultravox if you want:
- Skips the speech-to-text step
- 30 free minutes to start
- Unlimited playground calls
Watch out: developer-focused, not a no-code tool.
Choose Hume AI if you want:
- Deep focus on tone and emotion
- Evaluation tools for voice products
- Supports 50+ languages
Watch out: pricing not shown on the homepage.
Ultravox vs Hume AI FAQ
What is the difference between Ultravox and Hume AI?
Ultravox: Speech-native voice AI platform for real-time voice agents. Hume AI: Emotionally intelligent voice AI, expression APIs and voice evals. Both are models & apis tools.
Is Ultravox or Hume AI cheaper?
Ultravox starts at $100/mo and Hume AI starts at See pricing page. Check both pricing pages for current plans.
Do Ultravox and Hume AI have free plans?
Ultravox: Yes. Hume AI: Yes.
Who makes Ultravox?
Ultravox is made by Ultravox (Inworld), based in United States.
Who makes Hume AI?
Hume AI is made by Hume AI, based in United States.
Which should I choose, Ultravox or Hume AI?
Choose Ultravox if you value skips the speech-to-text step and 30 free minutes to start. Choose Hume AI if you value deep focus on tone and emotion and evaluation tools for voice products.