بِسْمِ ٱللَّهِ ٱلرَّحْمَـٰنِ ٱلرَّحِيمِ

Practice your deen. With receipts.

It's before fajr. A question won't let you sleep. By the time you've made wudu, you have the matn, the chain across the schools, the gradings, and the disagreement — with receipts you can show your imam.

The Agentic Islamic Operating System · Ummah-tested by 571,000+ Muslims worldwide.

Ask about any hadith, ruling, or scholar…

15 free questions daily · No signup · No credit card

572K+Theo users worldwide
1.8M+citations served
8.5M+pages of Islamic reasoning
3M+conversation-equivalents
617,912Hadith cataloged
480,334Independently graded
21,617Narrators graded
889,913Transmission links
95.8%Bukhari convergence
THE FOUNDATION

We built the hadith science first. Then the AI.

95.8%

Independent sahih+hasan rate on Sahih al-Bukhari

Our computational grading pipeline independently produces sahih+hasan rates very close to classical compilers' selection criteria — without being trained on their conclusions. The 4.1% divergence has documented causes (PID disambiguation, anonymous-narrator penalties, mu'allaqat, deliberate weak chains for topical completeness).

Bukhari95.8%
Muslim95.8%
Muwatta97.1%
Tirmidhi88.4%
Abu Dawud86.7%
Nasa'i89.2%
Ibn Majah78.9%
Ahmad71.6%
Darimi82.1%
SEE HOW THEO THINKS

One question. The full reasoning trace.

Watch a question become an answer with its sources attached

Watch a real Reasoner-mode answer play out — investigation, reasoning, verification, operations, citations, and evidence map. Plays once automatically; tap replay to see it again.

ReasonerPlus tier
You

How do I pray Tahajjud step by step?

Investigation
Reasoning
Verification
Operations

Live trace from a Reasoner-mode answer. No signup required.

Eve-Theology™ F5/reasoner · IPSC v4.0.0

WHO IT'S FOR

Three ways people use Theo.

The seeker

You have a question and you want the evidence, not a verdict.

Ask in plain language. Get the narration, the chain, how the schools differ, and what the grading rests on — in a form you can take to someone who knows more than you.

Ask a question, free →

The student and the teacher

You need the chain checked, and you need to cite it.

Trace an isnād through 26,923 indexed narrators, see where a chain weakens and why, and export a citation. The corpus and its methodology are published — you can check our working, not just our answer.

Read the methodology →

The institution

Your scholars decide. Theo assembles what they decide from.

Evidence, precedent and the reasoning behind them, gathered for review by the people qualified to rule on it. Team management, API access and priority support on the Institute plan.

See the Institute plan →
THE THEOAI PLATFORM

Four products. One corpus. One methodology.

Shared Evidential Core — 617,912 hadith · IPSC v4.0.0 · Patent Pending

Digital Employee

Theo

One-on-one evidence-based Islamic Q&A. Every answer grounded in Quran and authenticated hadith with full source citation.

Ask Theo →

Community

Majlis

Collaborative scholarly space. Study circles, shared investigations, and community-driven hadith research with full evidence trails.

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Governance

Mizan

Islamic financial governance for Shariah boards. An evidence layer — sources, precedent, and the reasoning behind them — assembled for board review. The board decides; nothing is approved automatically.

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Corpus & API

IPSC

The Islamic Primary Source Corpus — 617,912 narrations cataloged, every chain parsed. Search it, cite it, or license the API.

Search the corpus →

Weekly Evidence Brief from Theo

A weekly hadith verification, Quranic analysis, or fiqh comparison — direct from the IPSC corpus.

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QUESTIONS

Common questions

Is TheoAI free to use?

Yes. The first 15 questions per day are free with no credit card required. Paid plans unlock more daily questions, longer context, and additional tools.

Where do answers come from?

Every TheoAI answer is grounded in the Islamic Primary Source Corpus (IPSC) v4.0.0 — 617,912 hadith cataloged from 123 classical works, every chain parsed, every narrator resolved. The system surfaces sources, narrator reliability, and limitations with each response.

Can I cite TheoAI in my research?

Yes. Citation guidance and BibTeX/RIS exports are at ipsc.theogrid.ai/citation. Cite IPSC v4.0.0 (currently deployed) and disclose the AI-assisted nature of any computational grading you reference.

Is my conversation private?

TheoAI runs entirely on Microsoft Azure (Eve-Grid™) with Microsoft Entra ID authentication, AES-256 encryption at rest, and TLS 1.2 or higher in transit. We do not sell or share conversation content. Analytics tracking is consent-gated and you can decline at any time.

بِسْمِ ٱللَّٰهِ ٱلرَّحْمَٰنِ ٱلرَّحِيمِ

Your first 15 questions are free. Ask Theo anything.

I'm here. Ask me anything about Islam. Every source cited. Every chain parsed.

Ask about any hadith, ruling, or scholar…

617,912 hadith cataloged · 480,334 graded (77.7%) · 95.8% Bukhari convergence