What is Hume AI?
Emotionally intelligent voice AI, with open tools and datasets.
Who is Hume AI best for?
Hume AI is best for developers building voice agents or narration that should sound and respond with emotion.
Voice agents that read the room
EVI is a speech-to-speech API that responds to the caller's tone, and it plugs into Twilio, LiveKit, Vapi and Agora.
Expressive narration
Octave text-to-speech lets you steer tone, pacing and emotion, and every plan includes voice cloning and voice conversion.
Measuring emotion in calls
The Expression Measurement API tags audio with 48+ emotion categories and 600+ voice dimensions, offline or in real time.
Teams testing voice AI models
Kairos runs simulated conversations, and the Human Feedback API returns scores from screened human raters, so voice AI teams can see where their models fall short; both are sold through Hume's research team.
How much does Hume AI cost?
Hume AI has a free plan with 10,000 text-to-speech characters and 5 minutes of voice chat a month, and paid plans run from $3 to $500 a month, with a commercial license from the $14 Creator plan up.
- 10,000 text-to-speech characters, about 10 minutes
- 5 minutes of EVI speech-to-speech
- No commercial license
- 30,000 characters, about 30 minutes
- 40 minutes of EVI
- No commercial license
- 140,000 characters, about 140 minutes
- 200 minutes of EVI
- Commercial license; extra characters $0.15 per 1,000
- 1,000,000 characters, about 1,000 minutes
- 1,200 minutes of EVI
- Commercial license; extra EVI $0.06 a minute
Scale is $200 a month (3.3M characters, 5,000 EVI minutes, 3 team seats) and Business $500 a month (10M characters, 12,500 EVI minutes, 5 seats); Enterprise is custom, with unlimited seats and SOC 2 Type II, GDPR and HIPAA compliance. Minutes and rates shown are for Octave 1 and EVI 3: Octave 2 turns the same characters into about twice the speech, and extra Octave 2 and EVI 4 mini use costs half as much. One subscription covers text-to-speech, EVI and voice cloning, and new accounts start with $20 in credits. Full pricing on hume.ai. We checked these prices on .
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Questions about Hume AI
What is Hume AI?
Emotionally intelligent voice AI, with open tools and datasets.
Who is Hume AI for?
Hume AI is best for developers building voice agents or narration that should sound and respond with emotion.
Is Hume AI free?
Yes. Hume AI has a free plan: 10,000 text-to-speech characters, about 10 minutes.
How much does Hume AI cost?
Hume AI's paid plans are Starter at $3 per month, Creator at $14 per month and Pro at $70 per month.
Where can I try Hume AI?
On its official website, hume.ai.
Can I use Hume AI voices for commercial work?
Hume AI includes a commercial license only on Creator, at $14 a month, and the plans above it: Pro, Scale, Business and Enterprise. The Free and Starter plans let you try the voices but not use them in commercial work.
Does Hume AI charge for the language model behind EVI?
Hume AI charges for EVI's language model only when you use one that Hume runs for you, which adds to your usage bill. If you connect EVI to your own LLM API key or a custom language model, Hume does not charge for that model.
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