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Hume AI
✓ verifiedPaid
Voice AI research lab offering emotionally intelligent speech models and APIs for developers building empathic voice applications.
247K visits/mo
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VoiceMaker
✓ verifiedFreemium
Full-featured text-to-speech studio with standard and neural voices plus SSML-level controls for developers and creators.
731K visits/mo
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ttsMP3.com
✓ verifiedFree
Free browser-based text-to-MP3 converter using Amazon Polly voices across 28+ languages with SSML controls.
599K visits/mo
Pricing
No public pricing
No public pricing
No public pricing
Core features
- ✦Empathic, emotionally intelligent voice models
- ✦Human-feedback and evaluation APIs
- ✦Open-source models and datasets
- ✦Coverage of 50+ languages and dozens of emotions
- ✦Expression measurement and speech tooling
- ✦Standard and neural AI voice engines
- ✦Multiple Pro voice models (Expressive, High-Res, Turbo)
- ✦Fine-tuned controls for pause, pitch, speed, volume, emphasis
- ✦SSML support with a pronunciation editor (paid plans)
- ✦Voice cloning and custom voice collections
- ✦Speech-to-speech voice conversion
- ✦Subtitle (.srt/.txt) generation alongside audio
- ✦Text-to-MP3 conversion powered by AWS Polly
- ✦28+ languages and multiple regional accents/voices
- ✦SSML tags for pauses, emphasis, speed, and pitch
- ✦Multi-speaker conversation formatting
- ✦Daily free character limit (~3,000 characters)
Use cases
- →Building empathic voice assistants
- →Measuring emotional expression in speech
- →Running human evaluations of voice models
- →Adding emotional intelligence to apps
- →Developers building TTS into products via API
- →Content creators producing narration for videos or IVR systems
- →Businesses needing multilingual, accent-specific voiceovers
- →Creators fine-tuning pacing and pronunciation for polished audio
- →Creating narration for e-learning or presentations
- →Adding accessible audio to websites
- →Producing quick voiceovers for YouTube videos
- →Generating multi-character dialogue audio clips
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