VoiceBrief – Turn textbooks into 1-hour audio lectures with AI

Show HN: VoiceBrief – Turn textbooks into 1-hour audio lectures with AI

Based, VoiceBrief – Turn textbooks into 1-hour audio lectures with AI works in show hn launch.

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I built VoiceBrief (https://voicebrief.io) to solve my own problem: 2-hour daily commute during college with no way to study on a crowded train. Upload a PDF → Get two audio formats: - 10-min summary narration - 1+ hour professor-style deep dive Plus: real-time text highlighting, bookmarks, AI quizzes with spaced repetition. Tech: React/Express/PostgreSQL, OpenAI GPT-4 + TTS-1-HD, Railway hosting. Main challenge: TTS costs ~$2-3 per 50-page PDF. Looking for cost optimization strategies. Free tier: 3 PDFs. Bootstrapped, ~500 users, no VC funding. Would love feedback on pricing ($9.99/mo Pro?) and TTS alternatives!

As a business in show hn launch, VoiceBrief – Turn textbooks into 1-hour audio lectures with AI is listed here with the public details available about it.

Its current recorded stage is Show HN launch.

Website: voicebrief.io