Hume AI - Voice Intelligence Powered By Empathic AI
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Hume AI Brief overview
Hume AI is a voice AI platform focused on highly realistic, emotionally expressive speech for creators and developers. It offers Octave (text-to-speech) and EVI (Empathic Voice Interface) (speech-to-speech) so you can generate lifelike voiceovers, audiobooks, podcasts, or build real-time conversational voice agents. Hume positions these models as “powered by emotional intelligence,” aiming for natural pacing, tone, and nuance rather than flat, robotic narration.
For creators, Hume highlights workflows like making multi-character audiobooks (including uploading a PDF), producing video voiceovers, and generating multi-speaker podcasts. For developers, Hume provides APIs/SDKs to embed these voice capabilities into apps and products.
How-to-use
- Create an account and start a project in the Hume platform. New accounts begin on a free tier (Hume also notes free-tier credits for some usage types).
- Pick what you’re building:
- Text-to-speech (Octave): Paste or upload a script (or use creator tooling), select a voice (or clone one if available on your plan), add any style/delivery guidance, then generate and download audio.
- Speech-to-speech (EVI): Integrate EVI into your app for real-time voice conversations. Hume describes EVI as configurable for behavior and controls, and designed for conversational latency.
- Use the developer stack if needed: Choose an SDK (Hume lists options like Python, TypeScript, Swift, React, and .NET) and follow the docs to connect your app to the API.
- Monitor usage and billing: Plans include bundled usage, with overages depending on plan and product.
Hume AI Key features and functions
- Octave text-to-speech: Positioned as more than traditional TTS—Hume describes it as a “voice-based LLM” that understands context to predict emotion and cadence, with low latency and multilingual support (Hume lists 11+ languages).
- EVI speech-to-speech (real-time voice agent): Built for low-latency voice conversation and customization, including configuration options, “conversational controls,” and conversation history capture.
- Voice cloning and prompted voices: EVI emphasizes voices that can be preset, cloned, or “prompted,” and Hume notes cloning speaking style from short recordings (and fine-grained tone directions like “whisper anxiously”).
- Works with other models/tools: Hume describes EVI as able to communicate with other models/tools in parallel and also mentions combining EVI with external language models.
- Creator use cases: Audiobooks (PDF upload + character selection), video voiceovers, podcasts, and enterprise voice use cases like phone-call style agents.
Pricing
Hume’s subscription plans bundle access to Text-to-Speech (TTS), Speech-to-Speech (EVI), and Voice features under one subscription (no separate plan required for each of those).
Subscription tiers (monthly):
- Free: $0/month (includes 10,000 TTS characters ~10 minutes and 5 EVI minutes).
- Starter:$3/month (includes 30,000 TTS characters ~30 minutes and 40 EVI minutes).
- Creator:$14/month (pricing page also shows a promo at the time of capture), includes 140,000 TTS characters ~140 minutes, 200 EVI minutes, and lists $0.15 per 1,000 additional characters.
- Pro:$70/month (includes 1,000,000 TTS characters ~1,000 minutes, 1,200 EVI minutes, $0.12 per 1,000 additional characters, and shows EVI pricing at $0.06/min at that tier).
- Scale:$200/month (includes 3,300,000 TTS characters ~3,300 minutes, 5,000 EVI minutes, $0.10 per 1,000 additional characters, and shows EVI pricing at $0.05/min at that tier).
- Business:$500/month (includes 10,000,000 TTS characters ~10,000 minutes, 12,500 EVI minutes, $0.05 per 1,000 additional characters, and shows EVI pricing at $0.04/min at that tier).
- Enterprise: Custom.
Hume also lists Expression Measurement as pay-as-you-go, with published rates such as $0.0828/min (video+audio), $0.0639/min (audio-only), $0.045/min (video-only), $0.00204/image, and $0.00024/word (text) (with volume discounts).
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