Features
Theostack is a focused tool. Every feature exists to help you do better theological research, faster — with sources you can trust.
The Library
Over 2,200 works spanning the breadth of Christian thought — from the Church Fathers through the Reformers and Puritans to contemporary evangelical scholarship. Every text hand-selected for orthodoxy, scholarly value, and pastoral usefulness.
Not the whole internet. Not a random scrape of public domain texts. A carefully curated library built for the working pastor.
How It Works
Type or speak a theological question in plain language.
Your query is rewritten into multiple search strategies and run against the curated corpus.
A synthesized response with inline citations to real passages from real texts.
Assistants
Upload your sermon manuscript or transcript and receive a devotional summary, study guide, or both — complete with key quotes, discussion questions, and additional reading.
Upload a manuscript or transcript and receive a structured feedback report covering exegetical accuracy, theological depth, structure, application, and gospel centrality.
Bring any passage of Scripture and receive rigorous, source-grounded exegetical help — context, structure, key terms, and commentary from the library.
Ask any doctrinal question and receive a clear, confessionally grounded answer — with Scripture, the historic creeds, and the best theologians in the library.
Explore two thousand years of Christianity — people, councils, movements, and controversies — grounded in primary sources and the best historical scholarship.
Cross-domain theological research, quote finding, series planning, and deep dives across the full Theostack library.
Biblically grounded frameworks, key resources, and practical wisdom for any presenting issue — from anxiety and anger to marriage crisis and addiction.
Theology of marriage, premarital preparation, parenting, family discipleship, and navigating the hardest pastoral questions about sexuality and the family.
Church polity, elder and deacon ministry, membership, discipline, staff culture, leadership development, and congregational revitalization.
Personal evangelism preparation, outreach strategy, evangelistic preaching, and training your congregation to be faithful witnesses in a post-Christian culture.
Engage the hard questions — the problem of evil, the reliability of Scripture, faith and science, competing worldviews, and the intellectual challenges your congregation faces.
Voice Mode
Voice mode lets you do theological research while you walk, drive, or work at a whiteboard. Every spoken answer is backed by the same curated library — the same source fidelity as text chat.
Natural conversation, zero setup. Works on any device with a microphone.
Projects
Create projects for sermon series, Bible studies, or research topics. Upload your own notes, outlines, and documents — Theostack searches them alongside the library in every conversation.
Everything stays organized. Nothing gets lost.
Scripture
Automatic verse resolution and inline scripture display. Ask about a passage and see the text alongside theological commentary. Cross-references included.
Supports BSB and KJV with more translations coming. Choose your preferred version in settings and it follows you everywhere.
“For by grace you have been saved through faith. And this is not your own doing; it is the gift of God, not a result of works, so that no one may boast.”
Ephesians 2:8-9 (BSB)
The Theostack Difference
Every answer cites real passages from real texts. No hallucinated citations. No fabricated quotes. No conflated authors. You see exactly where every claim comes from.