Conversational AI with
emotional intelligence
Build voice-first AI experiences that understand and respond to human emotions. Natural, empathic conversations at scale.
Bring your own LLM
Use any language model you want. EVI works seamlessly with Claude, GPT, Gemini, Grok, Kimi K2, Llama, and more. Switch models without changing your integration.
Your voice, your way
Choose from a curated library of expressive voices, clone any voice from a sample, or design entirely new voices from natural language descriptions. Create the perfect voice for your brand.
Real-time streaming
Start playback in milliseconds with streaming audio output. EVI begins generating speech instantly, streaming audio chunks as they're ready. Perfect for real-time applications where every millisecond counts.
Try it yourself
Experience EVI firsthand in our interactive playground. Configure your agent, test different voices, and see how emotional intelligence transforms conversations—no code required.
Features
Everything you need for voice AI
Interruptibility
Users can interrupt at any time, just like real conversations.
Pause responses
Programmatically pause and resume responses at any moment.
Resume chats
Pick up conversations right where they left off with full context.
Chat history
Access complete transcripts with timestamps and emotion data.
Dynamic variables
Inject real-time data like user names, account info, and prices.
Context injection
Add context mid-conversation for RAG and knowledge bases.
Tool use
Connect to your APIs for appointments, orders, and more.
Audio reconstruction
Reconstruct complete audio from any conversation on demand.
For Developers
Build voice experiences in minutes
Integrate EVI into your application with just a few lines of code. Full SDK support for React, TypeScript, Python, .NET, Swift, and more.
Case Studies
See what others are building
Niantic Spatial × Hume AI: Creating Interactive & Spatially Aware AI Companions
In partnership with Snap Inc. (hardware) and Hume AI (voice), Niantic Spatial has developed location-aware companions for Spectacles, blending Snap Inc.’s AR glasses, Niantic Spatial’s Large Geospatial Model, and Hume’s Empathic Voice Interface (EVI) for natural, emotionally intelligent conversation. Niantic Spatial, the team pioneering AI that understands the physical world, is showcasing a compelling glimpse of what can happen when spatial intelligence and augmented reality meet.
GAF Powers Professional Training with Hume’s Text-to-Speech
To support their extensive training programs and marketing initiatives, GAF leverages Hume's text-to-speech technology to make internal training videos and marketing voiceovers. Our partnership addresses several key needs: Professional training content: Delivering consistent, high-quality audio for thousands of contractors and employees. Marketing collateral: Producing engaging voiceovers for promotional content and product demonstrations. Scalable production: Generating content without the logistics and cost of traditional voice recording. Hume's voice design also proved ideal for GAF. The platform's natural, expressive voices maintain the authoritative yet approachable tone that GAF needs to communicate with contractors, retailers, and customers. Unlike synthetic voices that can sound robotic or overly casual, Hume's TTS technology delivers the polished, trustworthy quality expected from an industry leader.
Hume AI powers conversational learning with Coconote
While traditional note-taking apps require students to manually scroll and search through content, Coconote is creating interactive study experiences through conversational AI. Coconote’s voice chat feature, powered by Hume's EVI, helps users transform static notes into dynamic conversations. Students can: Ask natural questions about their lecture content Receive contextual explanations referencing specific notes, and Engage in quiz-style conversations for active learning—all through natural voice interaction.
Enterprise Ready
Built for business
Deploy with confidence knowing EVI meets the security, compliance, and scale requirements of enterprise applications.
Contact salesSOC 2 Type II
Enterprise-grade security with industry-leading practices.
HIPAA compliant
Build healthcare applications with confidence.
Enterprise plans
Custom SLAs, dedicated support, and volume pricing.
FAQ
Frequently asked questions
Start building with EVI
Create voice experiences that truly understand your users. Free to start, scales with you.