TheoSumma

What TheoSumma is, and who it is for

TheoSumma began with a simple observation: most Christians, even devout ones, never get to read the thinkers their faith is built on. Aquinas's Summa Theologica runs to thousands of pages of dense scholastic Latin; Augustine's corpus fills forty volumes; Karl Barth's Church Dogmatics is nine thousand pages of German. A serious layperson can go their entire life hearing sermons that paraphrase these thinkers without ever encountering them directly. That's not anyone's fault — it's the economics of time — but it impoverishes Christian thought.

TheoSumma closes that gap. We use large language models grounded in the actual primary texts of the theologians they represent, so when you ask Thomas Aquinas about grace, the response draws from the Summa and Aquinas's commentaries on the Sentences, citing paragraph and article. Ask Augustine of Hippo about memory, and the AI reaches into the Confessions and De Trinitate. Ask Karl Barth about revelation, and you receive a response rooted in his Church Dogmatics, not a generic paraphrase of "Protestant theology."

The same approach reaches the people of the Bible. You can ask Abraham about faith, Job about suffering, Paul about grace, Mary about consent, Peter about failure. Every response is anchored in the biblical text and the best historical-critical and traditional scholarship, with citations you can follow back to chapter and verse — and often to an early-church commentary that read the passage before you.

TheoSumma serves three audiences directly. Seekers who have real questions about Christian faith and want answers that don't paper over the hard parts. Thinkers — lay believers, pastors, small-group leaders, seminary students — who want to study Scripture alongside the thinkers who shaped its interpretation. And scholars who need a citation-first research assistant to prepare sermons, write papers, or simply read widely outside their specialty.

The twelve surfaces, one stack

Everything on TheoSumma runs on the same citation-first Scripture-rooted retrieval stack. The twelve product surfaces are different interfaces onto that stack, each tuned for a different mode of study.

Expert Insights

Five surfaces for conversing with Christian thought itself: the AI Experts library of thirty-plus theologians from the patristic era to contemporary voices; the Authors index organising them by era; Biblical Figures for the people of Scripture; Systematic Theology mapping the nine classic loci of Christian doctrine; and Theological Traditions — Catholic, Orthodox, Reformed, Lutheran, Anglican, Baptist, Wesleyan, Pentecostal, and the schools of Thomism and Augustinianism — each represented on its own terms by its own sources and theologians.

Study

Seven surfaces for the practical work of the Christian life. Bible Corner is the study workspace — read any passage in any translation, open verse-level commentary drawn from the whole tradition, memorise passages with spaced-repetition prompts, and join or run study groups around a shared reading plan. Bible Chat is the conversational interface to Scripture, surfacing what a text has meant across two thousand years of Jewish and Christian interpretation.

Worship Corner serves worship leaders and their teams — a shared song library, chord charts, setlists, auto-scrolling lyrics for the musician, and a Chromecast-ready presenter mode for projection. Spiritual Growth produces a personalised rhythm of prayer, Scripture reading, and reflection tied to your season of life and the liturgical calendar, never shaming gaps. Confession Partner is a private, prayerful examen companion for Catholic, Orthodox, and Anglican believers preparing for the sacrament — nothing stored, nothing shared, not a replacement for the priest.

Chat with a PDF turns any paper, monograph, or dissertation into a conversation with page-accurate citations, so you can navigate a long dense text by asking it questions. Deception Detector analyses a sermon, clip, or article for rhetorical manipulation, doctrinal drift, and mis-cited Scripture through the theological tradition you choose as the reference frame.

What TheoSumma is not

TheoSumma is not a substitute for your parish, your priest, your pastor, or your spiritual director. The sacraments belong to the Church. Pastoral counsel belongs to the people God has placed in your life. Spiritual direction is a ministry, not a chatbot feature. We explicitly mark features like Confession Partner as preparation for the sacrament — never absolution, never a digital priest.

TheoSumma is also not neutral. We think the Nicene Creed is true. We represent theological disagreements as disagreements — Catholic, Orthodox, Reformed, Lutheran, each in its own voice — rather than flattening them into a lowest-common-denominator "Christianity in general." The moment we smuggle in a house theology and pretend to be ecumenical is the moment we stop being useful to serious readers. So when traditions differ on justification, the real presence, the filioque, or the fate of the unevangelised, the AI names the disagreement, cites representative voices on each side, and lets the reader decide where to go from there.

Free, forever, for Scripture and the Church

The core of TheoSumma — Bible Chat, the great theologians, biblical figures, systematic theology, the traditions, the worship library, and the community — is free, always. That isn't a marketing headline; it's a commitment. If the economics ever force us to change that, we'll grandfather current users and announce it on the pricing page first.

"The laborer deserves his wages." — 1 Timothy 5:18. The sacraments and the Scriptures are free; the compute bills are not.

Paid tiers (Basic, Standard, Pro) exist for three reasons: they raise daily usage limits for heavy users, they unlock the stronger Expert model for research-intensive sessions, and they add multimodal features — speech-to-text, image recognition, PDF analysis — that cost real money to run. The money pays for compute, for the small team that curates and maintains the library, and for the ongoing work of translating TheoSumma into sixteen languages. No investor dividends, no ad spend, no sales commissions.

How the citation-first stack works

Every response on TheoSumma begins with retrieval against a curated theological corpus: primary texts, conciliar documents, denominational catechisms, critical editions of patristic and medieval works, and peer-reviewed modern scholarship. The retrieval returns the passages most relevant to your question, and the AI composes its answer strictly from those passages, carrying every quotation and paraphrase back to its source with paragraph-level precision.

This is why TheoSumma can credibly say it is grounded in the tradition rather than merely "trained on Christian content." A generic chatbot with a broad web corpus will confidently misattribute a quotation to Chesterton that he never wrote; our stack, when it can't verify a quotation against a retrieved source, simply refuses to include it. That refusal is the product. Sites and books that shape your theology should be traceable to paragraphs you can open and read for yourself.

We built the system around three non-negotiable commitments. First, citations to primary sources on every substantive claim — not footnotes to Wikipedia, but to Migne's Patrologia, to Pelikan's translation of the Orthodox liturgy, to the Catechism of the Catholic Church §1422 and its adjacent paragraphs, to the specific article and reply of the Summa. Second, representation without flattening — each tradition speaks in its own voice rather than being paraphrased by an outsider. Third, privacy by default — your journal, your examen preparation, and your study notes are yours alone, never used for model training, never shared.

The sixteen languages

TheoSumma is available in sixteen languages: English, Arabic, Mandarin Chinese, French, Spanish, Portuguese would come next. Today the live locales are English, Arabic, German, French, Italian, Spanish, Hungarian, Greek, Hebrew, Persian, Turkish, Chinese, Hindi, Urdu, Indonesian, and Bengali. Each language is not a machine translation of the English product — it is a localised edition with script-aware typography (Nastaliq for Urdu, Kufi for Arabic headlines, Devanagari for Hindi), right-to-left layout where appropriate, and locale-correct theology terminology.

The goal is to make the Christian intellectual tradition available to the majority-world Church in its own languages, not just in English translation. The patristic era wrote in Greek and Latin and Syriac and Coptic and Armenian long before it wrote in English; our default assumption is that Christians studying the tradition today deserve that same breadth.

What to try first

If you are new to TheoSumma and want to see what it actually does, start with one of three entry points. Ask an AI expert a real question you have been carrying — not a test, an actual question. Or open the Bible Corner and study one psalm with the traditional commentary. Or browse the theological traditions page and read a tradition's self-description by its own voice. Each of these takes ten minutes and will tell you honestly whether TheoSumma is a serious instrument or just another chatbot.