Ever wished you could search across thousands of hours of sermons, lectures, and Christian podcasts for that one insight you half-remember? OpenTheo makes that possible — it's a free, open archive of transcribed Christian audio and video content, fully searchable and growing every week.^1
Built using AI-powered transcription (OpenAI's Whisper model), OpenTheo has processed over 10,000 hours of content from well-known teachers and ministries including Steve Gregg, Stand to Reason, NT Wright, Dr. Mike Licona, Kevin DeYoung, The Veritas Forum, Dr. Martyn Lloyd-Jones, and many more.^2 Every transcript is interactive — click any word to jump straight to that moment in the audio, and follow along as the currently playing section is highlighted in real time.^3
OpenTheo is an ecumenical ministry not affiliated with any denomination, with faith commitments summarized in the Apostles' Creed. Content publishers can have their podcasts, YouTube videos, or sermons transcribed and added to the index completely free of charge.^1
Why Christians Love It"One of the most amazing biblical studies resources I've ever seen. Transcripts coupled with audio and searchable and indexed with summaries of each lecture — what an amazing use of technology and time." — darinhouston, The Narrow Path Forum^4
"Thanks, that's really helpful. I learn better by reading than listening." — PR, The Narrow Path Forum^4
Notable- Launched in March 2023 by developer Leif Foged, who shared the project in the Whisper.cpp open-source community^3
- Features transcribed content from prominent voices across Reformed, evangelical, and broadly orthodox traditions
- Entirely free with no ads, subscriptions, or paywalls
