Hume AI vs Deepgram

Detailed side-by-side comparison to help you choose the right tool

Hume AI

🔴Developer

Voice AI

Empathic voice AI — EVI 3 speech-to-speech model with real-time prosody understanding, Octave expressive TTS, and emotion/expression measurement APIs for voice, face, and video.

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Starting Price

Custom
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Deepgram

🔴Developer

Voice AI

Speech-to-text, text-to-speech and voice agent APIs with industry-leading latency, accuracy and per-language model quality.

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Starting Price

Free
Full ReviewVisit Site

Feature Comparison

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FeatureHume AIDeepgram
CategoryVoice AIVoice AI
Pricing Plans36 tiers104 tiers
Starting PriceFree
Key Features
    • • Speech-to-text APIs for streaming and prerecorded audio
    • • Flux conversational STT for real-time voice agents with turn detection and interruption handling
    • • Text-to-speech through Aura voices

    Hume AI - Pros & Cons

    Pros

    • ✓EVI 3 reads user prosody and adjusts delivery — meaningfully improves wellness, coaching, and support UX
    • ✓BYO-LLM lets OpenAI, Anthropic, or open models do the reasoning while Hume handles the voice loop
    • ✓Public, tiered pricing from $0 to $500/month is unusually transparent for a frontier voice lab

    Cons

    • ✗Per-minute EVI and per-character Octave usage on top of plan credits makes cost forecasting harder
    • ✗Voice catalog is smaller than ElevenLabs and customization requires more work
    • ✗Expression measurement APIs raise consent and policy questions before shipping in production

    Deepgram - Pros & Cons

    Pros

    • ✓Best-in-class word error rate via Nova-3 model across 30+ languages
    • ✓Aggressively priced per-minute: from $0.0043/min beats most rivals
    • ✓Voice Agent API unifies STT + LLM + TTS with server-side turn-taking
    • ✓Free $200 credit lets teams prototype end-to-end without commitment
    • ✓On-prem deployment supports HIPAA and air-gapped environments

    Cons

    • ✗Aura TTS voice library smaller than ElevenLabs or Cartesia
    • ✗Documentation can feel dense for first-time integrators
    • ✗Some advanced features (diarisation tuning) require sales conversations
    • ✗Voice agent API still maturing relative to Vapi or Retell AI for high-level orchestration

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    🔒 Security & Compliance Comparison

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    Security FeatureHume AIDeepgram
    SOC2—✅ Yes
    GDPR—✅ Yes
    HIPAA—❌ No
    SSO—✅ Yes
    Self-Hosted——
    On-Prem—✅ Yes
    RBAC—✅ Yes
    Audit Log—✅ Yes
    Open Source—❌ No
    API Key Auth—✅ Yes
    Encryption at Rest—✅ Yes
    Encryption in Transit—✅ Yes
    Data Residency—US
    Data Retention—configurable
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    Read the full reviews to make an informed decision

    Review Hume AIReview Deepgram