What is TheoSumma? TheoSumma is a Christian AI assistant built on Scripture and two thousand years of theological reflection. It reads from the Catholic, Orthodox, and Protestant traditions — from the Church Fathers through Aquinas, the Reformers, and contemporary theologians — and cites its sources on every answer. Chapter and verse for Scripture. Treatise and section number for the theologians. You verify against the primary text rather than taking the assistant’s word for it.
It is built for seekers, students, pastors, catechumens, scholars, and anyone who wants a serious conversation about God grounded in the historic Christian tradition rather than internet hot takes. Free forever for personal study.
Chat with the great theologians TheoSumma’s AI Experts are configured on the actual writings of the theologians they represent — not on a Wikipedia summary. Ask Thomas Aquinas about the five ways and you get a response shaped by the Summa Theologiae and the Summa contra Gentiles, structured the way the Angelic Doctor structured his own arguments: objection, sed contra, response, reply to objections. Ask Augustine about grace and free will and the response draws on the anti-Pelagian treatises, the Confessions, and the City of God.
The roster spans the full tradition. Patristic voices: Athanasius, the Cappadocians (Basil, Gregory of Nazianzus, Gregory of Nyssa), John Chrysostom, Cyril of Alexandria, Maximus the Confessor. Medieval scholastics and mystics: Anselm, Bernard of Clairvaux, Bonaventure, Aquinas, Catherine of Siena. Reformation and post-Reformation: Luther, Calvin, Cranmer, the Wesleys, Edwards. Modern: Newman, Bavinck, Barth, Balthasar, Ratzinger, Lewis. Each one argues from their own sources, in their own voice.
You can also talk to biblical figures — Moses on the Law, David on the Psalms, Paul on justification, John on the love of God — and explore the authors whose works shape ongoing theological conversation. Browse the dedicated pages for each surface below.
Study Scripture deeply The Bible Corner is TheoSumma’s Bible-study hub. Open any passage and the assistant surfaces verse-level commentary, cross-references across the canon, original-language word studies (Hebrew, Aramaic, Greek), and parallels to passages of Patristic and medieval exegesis that engaged the same verse. Compare how the early Church read a text, how the medieval Doctors read it, and how the Reformers read it — side by side.
Bible Chat lets you ask questions about Scripture conversationally — context, authorship, intertextual links, theological readings — and the assistant always cites the verses it draws from. Use Chat with a PDF to bring your own theological text, commentary, or essay into the conversation and ask the assistant about it directly. Useful for seminary reading, catechesis prep, or working through a difficult passage in a primary source.
Explore Systematic Theology and the great Christian traditions Pick a doctrine — the Trinity, Christology, the sacraments, justification, ecclesiology, eschatology — and TheoSumma walks through how each tradition has understood it. The Systematic Theology surface organizes the field topically: prolegomena, theology proper, anthropology, hamartiology, soteriology, pneumatology, ecclesiology, eschatology. Each topic shows the consensus, the points of disagreement, and the historic sources where the disagreement is worked out.
The Theological Traditions surface goes the other way around: pick a tradition and learn what it believes, why, and from which sources. Roman Catholic, Eastern Orthodox, Oriental Orthodox, Anglican, Lutheran, Reformed, Wesleyan / Methodist, Baptist, Pentecostal — each treated on its own terms, with citations from its confessional documents and representative theologians rather than caricatured from outside.
Live the faith The Worship Corner gathers liturgical resources across traditions — the Liturgy of the Hours, the Divine Liturgy, the Book of Common Prayer, classical hymnody — and helps you pray the texts the Church has prayed for centuries rather than improvising on your own. Search by season, by feast, by liturgical hour, or by tradition.
Spiritual Growth helps you mark formation milestones over time: catechesis topics covered, books of Scripture studied, prayer disciplines practiced, retreats made. Confession Partner offers a reflective walk-through of conscience structured around the Ten Commandments and the seven deadly sins, with sensitivity to one’s state of life and tradition — preparation for the sacrament where the tradition practices it, or an examined-life exercise where it does not. None of these substitutes for a pastor, a confessor, or a spiritual director. They are tools for the rhythm.
Think clearly, discern carefully Deep Research runs a multi-step investigation across Scripture, the Fathers, scholastic and modern commentary, and academic theology — and emits a structured argument with the citations laid out so you can follow the reasoning step by step. Use it for sermon preparation, paper drafting, or when you want to understand a question more thoroughly than a single answer can express.
The Deception Detector reads a spiritual claim, a passage of writing, a TikTok transcript, or a sermon excerpt and identifies logical fallacies, unsupported assertions, mishandled Scripture citations, and rhetorical sleight-of-hand. Built for an age when bad theology travels in clips and threads faster than careful theology can answer.
Why TheoSumma? Two thousand years of Christian reflection does not fit in any one pastor, any one seminary, or any one library. The best teachers are gone. The best books are out of print or sit behind paywalls or wait on a reading list you will never reach. Most AI assistants treat theology as a regional flavor of opinion to be politely averaged. TheoSumma takes it as a field with its own sources, its own methods, and its own internal arguments — and puts the full library within reach.
It is not a replacement for your pastor, your bishop, your spiritual director, your seminary, the sacramental life, or the living community of the Church. It is a study companion that always remembers where it got the answer and is honest about what it does not know. Read the full story behind why TheoSumma was built and the ethical commitments that shape every response.
Frequently asked questions Is TheoSumma Catholic, Orthodox, or Protestant? All three. TheoSumma reads from the full Christian tradition and represents each on its own terms — citing the Catechism of the Catholic Church for Roman Catholic teaching, the Fathers and the Philokalia for Orthodox, the Reformation confessions (Augsburg, Westminster, Thirty-Nine Articles) for Protestant traditions. When you ask about a contested point, you can see how each tradition answers it. You can also pin a tradition for your session if you want the conversation grounded in one perspective.
How does TheoSumma cite its sources? Every answer that draws on Scripture or a primary theological text includes the citation inline — book and chapter and verse for Scripture, treatise and section number for the Fathers and the Doctors. You can click the citation to view the passage in context. The assistant is also configured to say when it is uncertain, when a question has historically been disputed, and when an answer is the assistant’s own synthesis rather than a citation of a primary source.
Is TheoSumma free? The free plan is meaningful — chat with the AI Experts, study Scripture in the Bible Corner, use the Confession Partner. A paid plan unlocks Deep Research, longer document uploads, higher monthly limits on the most expensive surfaces, and priority access during heavy load. See the pricing page for current plans.
Is TheoSumma a substitute for a pastor or spiritual director? No. TheoSumma is a study companion. A pastor, a confessor, a bishop, a spiritual director, or a faithful older Christian friend can do things this assistant cannot: read a soul, give absolution, lay on hands, walk with you in person over years. Use TheoSumma to study, to prepare, to examine — not as a replacement for the Body of Christ in person.
What languages does TheoSumma speak? TheoSumma is localized in over twenty languages — English, Arabic, Spanish, French, German, Italian, Portuguese, Greek, Hebrew, Persian, Turkish, Hungarian, Chinese, Hindi, Urdu, Indonesian, Bengali, and more. Each Scripture citation surfaces in the user’s language; theological technical vocabulary is preserved when the user’s tradition uses it that way.
Read the full story→ 