Fixie AI vs Hume AI
Two of the most-asked-about agents in the voice-agents space. Here's how they actually stack up.
Fixie AI
Developer platform for building voice AI agents that handle inbound and outbound phone calls
Free tier
Read full review →Hume AI
Empathic voice interface that detects emotion in speech and responds with emotion-aware synthesis
Free tier
Read full review →Side-by-side comparison
| Fixie AI | Hume AI | |
|---|---|---|
| Tagline | Developer platform for building voice AI agents that handle inbound and outbound phone calls | Empathic voice interface that detects emotion in speech and responds with emotion-aware synthesis |
| Pricing | Free tier | Free tier |
| Categories | voice-agents, voice, api, developer-tools | voice-cloning, conversational-agents, emotion-ai |
| Made by | Fixie AI | Hume AI |
| Launched | 2023-05 | 2021 |
| Platforms | API, Web | Web, API, Python SDK, TypeScript SDK |
| Status | active | active |
Fixie AI highlights
- + Real-time voice agents that handle phone calls with sub-second latency
- + Inbound and outbound call handling with programmable logic
- + Function calling so agents can query APIs, look up data, and take actions mid-call
- + Webhook integration for real-time event handling during conversations
- + Custom voice selection with multiple TTS providers
Hume AI highlights
- + EVI (Empathic Voice Interface) for real-time conversational voice with emotion detection
- + Emotion inference from vocal acoustics, detects 48 emotional dimensions in speech
- + Emotion-responsive TTS that adjusts prosody based on detected emotional context
- + Expression Measurement API for analyzing emotional content in audio, video, and text
- + Custom voice creation with emotional range preservation
Frequently Asked Questions
Which is better, Fixie AI or Hume AI?
Neither is universally better. Fixie AI (Free tier) leans into voice-agents, while Hume AI (Free tier) is closer to voice-cloning. Pick based on which workflow you actually do every day.
What is the price difference between Fixie AI and Hume AI?
Fixie AI is free tier. Hume AI is free tier. See the pricing row in the comparison table.
Can I use Fixie AI and Hume AI together?
In most cases, yes. They serve overlapping but distinct needs, so running them side by side is common until you decide which fits your workflow.