Chat with your PDFs, generate quizzes, flashcards, and podcasts
Stage
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Founded
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Based in
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Pricing model
Freemium
Freemium
Pricing
Free plan: unlimited topics, generated segments each session, extend 1 extra segment per topic. Pro plan: $16.9/month (originally $29), includes unlimited segment extensions, unlimited deep-dive questions, and realtime AI voice playback. Month-to-month with no lock-in; cancel anytime.
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Key features
Generate infinite audio lessons on any topic
Structured audio course with overview and deep-dive segments
Real-time playback with segment generation during listening
Web and mobile access with no download required
Sentence-by-sentence highlighting for hands-free learning
Browse hundreds of curated topics or enter custom topics
Growing knowledge trail showing mastered topics and next steps
Unlimited deep-dive questions with Pro plan
AI Document Chat with cited answers
Multi-format file support (PDF, DOCX, TXT, Markdown, URLs)
AI-generated quizzes from document content
AI flashcard creation tailored to key concepts
PDF to podcast audio generation
AI essay writer and grader
Document library with topic-based organization
Multi-document conversation support
What makes it different
Never-ending: Segments keep generating as long as you listen, unlike fixed-episode podcasts
On-demand personalization: Generate content for any topic instantly, not what a host chose
Continuous learning: Knowledge trail builds across all listening sessions
Fits existing time: Learn during dead time—commutes, workouts and chores without needing dedicated study
Free to start with no payment barrier to try learning
Answers include page references for source verification
Processes documents in seconds with no manual searching
All features work directly from uploaded content without copy-pasting
Lambda Infinity
NotebookLama