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Voice AI research lab offering emotionally intelligent speech models and APIs for developers building empathic voice applications.
Free Chrome extension that reads aloud webpages, Google Docs, PDFs, and ebooks in 60+ languages with premium voice upgrades.
Text-to-speech and voice-typing assistant that reads PDFs and web pages aloud and dictates text across apps, for readers and multitaskers.
Free browser-based text-to-MP3 converter using Amazon Polly voices across 28+ languages with SSML controls.
Text-to-speech app that turns PDFs, images and documents into natural AI narration for listening, plus voiceover creation.
No public pricing
No public pricing
No public pricing
No public pricing
- ✦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
- ✦Text-to-speech reading across webpages, Docs, PDFs, and email
- ✦Support for 60+ languages and 100+ voices
- ✦Adjustable reading speed, pitch, and volume
- ✦Background listening while browsing
- ✦Highlighting of text as it's read aloud
- ✦Minimal permissions with no data tracking claimed
- ✦1,000+ natural-sounding AI voices in 60+ languages
- ✦Adjustable playback speed up to 5x
- ✦Text highlighting synced to audio
- ✦Scan-and-listen photo-to-speech
- ✦Voice dictation/typing across apps
- ✦AI podcast generation from documents
- ✦Voice AI assistant for Q&A on read content
- ✦Cloud storage integrations (Drive, Dropbox, OneDrive)
- ✦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)
- ✦TTS from PDFs, images and text
- ✦Word/sentence highlighting for read-along
- ✦Playback speed up to 4x
- ✦Support for many languages
- ✦Multiple natural AI voices and styles
- ✦Voiceover creation; iOS and Android apps
- →Building empathic voice assistants
- →Measuring emotional expression in speech
- →Running human evaluations of voice models
- →Adding emotional intelligence to apps
- →Language learners listening while reading text
- →People with reading disabilities or visual impairment
- →Multitasking users listening to articles or documents hands-free
- →Editors and writers catching errors by hearing their drafts read aloud
- →Listening to long articles, PDFs or emails hands-free
- →Studying by having textbooks or lecture notes read aloud
- →Dictating text faster than typing across apps
- →Turning documents into podcast-style audio
- →Reducing eye strain from extensive reading
- →Creating narration for e-learning or presentations
- →Adding accessible audio to websites
- →Producing quick voiceovers for YouTube videos
- →Generating multi-character dialogue audio clips
- →Listen to documents while multitasking
- →Study and improve retention
- →Create voiceovers for projects
- →Accessibility for reading difficulties