theostack
Grounded. Faithful. Approachable.
Wisdom from the church, for the church.
Theostack equips pastors, teachers, and ministry leaders with disciplined AI-powered tools to study Scripture, prepare studies, and answer theological questions — all grounded in historic Christian faith.
What is Theostack?
Theostack is an AI-powered super commentary created by evangelical pastors, built for those who preach, teach, and disciple. It uses cutting-edge AI to sift through a vast library of theological resources to help you:
Study the Bible deeply
Prepare faithful sermons efficiently
Answer hard theological questions simply
No more paging through volume after volume in vain. Theostack puts the entire library right at your fingertips.
Trustworthy AI for Skeptics.
Why Theostack?
Built for the Church
Unlike open-source AI models, Theostack can only draw information from a fixed database — where every title has been manually verified and uploaded by trusted evangelical pastors.
Rooted in Sound Doctrine
Our ever expanding digital collection contains essential titles from real pastoral libraries, including public domain works, creeds, confessions, and the works of saints that have blessed the church for centuries.
Confined for Utility
We believe AI is one of the most powerful research tools available to pastors today. At its best, it can help teachers think more deeply, study more efficiently, and preach more effectively. We’ve programmed Theostack to that end — it is unable to generate original sermons, sermon outlines, or prayers.
Ask Theological Questions
Explore the wisdom trusted voices across church history have gleaned on your topic.
Explore Scripture with Confidence
Engage with 16 specialized assistants, including:
- History Assistant
- Languages Commentary
- Quote Finder
- Sermon Feedback
- Spurgeon AI
Get Feedback on Sermons & Studies
Upload a completed manuscript or full transcript for feedback on:
- Exegesis
- Structural clarity
- Application
- Law-Gospel balance
Build Your Own Library
Upload your favorite commentaries, confessions, or resources to train Theostack for your specific ministry context.
Faithful. Practical. Built for You.
Be the first to access Theostack and shape the future of faithful, AI-powered Bible study.