ElevenLabs vs Hume AI

Real-time and file-based voice conversion tool that changes a recorded voice while preserving its original performance.

Localizes and refreshes advertising creative across 50+ languages, with audio dubbing, image adaptation and text translation for Google Ads and Meta Ads.

Audio-to-audio dubbing across 90+ languages and accents that conditions on source performance (not a transcript) to preserve emotion and tone, with voice cloning.

AI-native creative workspace unifying voice, music, sound-effect, image and video generation with dubbing/localization, editable in a browser Studio.

Chains image, video, voice and SFX generation into automated visual flows to create unlimited campaign variations from one template.

Instant and Professional voice cloning (IVC/PVC) that creates a synthetic replica of a speaker's voice.

Music generation, remixing and creation product ("Listen, remix, and create tracks"), built on the Music v2 engine, targeted at independent musicians.

Creates videos from images and integrates AI voice, using a credit-based system.

End-to-end workflow for producing audiobooks, podcasts and narrated videos, integrating Voice Library, Voice Design, Professional Voice Cloning and Eleven Music.

Generates sound effects from text prompts, with royalty-free commercial usage rights on paid plans.

Generates customized synthetic voices from text descriptions, powered by the Text to Speech v3 model.

Removes background noise, isolates vocals and removes music from audio or video recordings.

Unified programmatic API for ElevenLabs' audio AI models (speech, voice, music, sound effects, dubbing, transcription), billed per usage from the shared credit pool.

Generates speech from text in a range of voices and languages, in the browser and through an API.

Transcribes audio to text with speaker labels and word-level timings.

Creator Studio is Hume's web application, hosted at app.hume.ai, for turning written documents into narrated audio: 'From document to audio, effortlessly. Import your content, assign voices, add acting directions, and export production-ready audio.' Hume targets it at creators producing audiobooks, videos, podcasts, documentaries, e-learning courses and corporate training that need multi-voice narration with emotional direction.

Empathic Voice Interface (EVI) is Hume's real-time speech-to-speech voice AI API, described in Hume's docs as 'an advanced, real-time emotionally intelligent voice AI.' The product page markets it as a way to 'Build voice-first AI experiences that understand and respond to human emotions' and states it 'works seamlessly with Claude, GPT, Gemini, Grok, Kimi K2, Llama, and more' - layering voice on top of third-party language models rather than supplying its own. It is billed per conversation minute on Hume's public plans.

The Expression Measurement API measures emotional and vocal expression in speech, marketed as 'Measure expression in voice, offline or in real time.' Hume describes two endpoints on the one page: 'The Tagger API returns 600+ expression and voice dimensions from any audio, at scale. The Prosody API delivers real-time emotional expressions during live conversations.' Measured dimensions include emotion categories, speaking styles, vocal qualities such as pace, warmth and hesitation, and expression intensity with confidence scores.

The Human Feedback API sells human evaluation of voice and conversational AI as an API call, marketed as 'One API call. Real human ratings.' and 'Plug human evaluation into your pipeline. Audio in, structured results out.' It supports three study types - live conversations with AI models, single-sample audio ratings with custom questions, and side-by-side A/B comparisons - with Hume handling participant recruitment, quality control and fraud detection. Hume states it powers 'evaluation for Hume's own frontier voice models.'

Octave TTS is Hume's text-to-speech API, which Hume's documentation calls 'the first text-to-speech system built on LLM intelligence.' The marketing page positions it as 'Text-to-speech with emotional intelligence' that generates 'expressive, natural-sounding speech that conveys the full range of human emotion,' with SDKs for Python, TypeScript, .NET and Swift and streaming audio output. It is billed by characters on Hume's public self-serve plans.