Legal
“Find the termination clause across all 12 vendor contracts.”
Uploaded 12 contracts. Got the answer with exact page and section in seconds. Used to take half a day.
Found in 3 seconds. Verified in 10.
Most AI guesses.Yours cites every word.
Tatsulok is the knowledge hub for work that gets scrutinized. Upload your documents, ask anything, and every answer links straight to the source. No hallucinations, no slop, nothing you have to take on faith.
Contract AnalysisLiterature ReviewDue DiligenceDocument DraftingScholar SearchCitation TrackingKnowledge ManagementRegulatory ComplianceMarket ResearchCase ResearchCompetitive AnalysisPolicy Review
See Tatsu work
Watch Tatsu work, before you sign up.
Add your documents, ask in plain language, get an answer cited to the source, then let Tatsu draft the reply, all grounded in your own files.
Live demo
Library
- Acme_MSA.pdfAdding…
- Q3_report.xlsx
- Board_deck.pptx
Bring your documents
Drop in contracts, reports, and notes. They stay in a private library, ready for the next question.
Add a file
01 · The claim
Code has tests. Research has benchmarks. Your work has you.
There is no test suite for a report, a proposal, a brief, the benchmark is the person who signs it. Tatsulok is a knowledge platform built for that person. Tatsu parses, drafts, and checks against your sources. Every claim stays verifiable. The final word stays yours.
02 · The proof
From question to cited answer.
Bring your files, ask in plain language, and draft with citations built in.
Bring your knowledge
Drop contracts, reports, and papers into a shared team library, they stay, ready for the next question.
Ask in plain language
Tatsu reads across everything you and your team have gathered.
Draft with citations built in
Every claim links back to the page it came from.
What does section 3.2 say about liability?
Section 3.2 caps each party's aggregate liability at the fees paid in the twelve months preceding the claim, and excludes breaches of confidentiality from that cap.
[1]MSA_2024.pdf · p.23[2]MSA_2024.pdf · §3.2.4
Every sentence links back to its source.[2]
The difference
Sounding right isn't the same as being right.
Generic AI optimizes for a confident answer. Tatsulok optimizes for one you can prove.
Most AI tools
Tatsulok
Sources
Most AI tools: A confident answer with nothing behind it.
Tatsulok: Every claim links to the exact page it came from.
When it doesn't know
Most AI tools: Fills the gap with a plausible-sounding guess.
Tatsulok: Tells you what it can't find. It never invents facts.
What it reads
Most AI tools: The open web, plus whatever it absorbed in training.
Tatsulok: Only your library, the documents you actually trust.
Verification
Most AI tools: "Trust me." You re-check everything by hand.
Tatsulok: Open the original in one click and confirm in seconds.
Accountability
Most AI tools: You proofread the AI before your name goes on it.
Tatsulok: You verify what matters, then sign with confidence.
Privacy
Most AI tools: Your documents may train someone else's model.
Tatsulok: Zero data retention. Private by default. You decide access.
03 · The reach
The same Tatsu, everywhere you work.
Your library and your conversations don't live in one tab. Start a question in the browser, continue inside a Word document, pick it up on the desktop, same knowledge, same context, same Tatsu.
Browser
Your full library, chat, and drafting in any browser, nothing to install.
Word
Tatsu works inside your document, citing your library inline as you write.
Desktop
A focused desktop app with the same knowledge and the same context.
04 · The work
Works where it matters.
Research
“What does the research say about this intervention's effectiveness?”
Searched the team's shared research library and scholarly sources. Got a cited synthesis with 8 sources in 30 seconds.
One team library. One question. Every source cited.
Strategy
“Draft a briefing memo on the SEA market from our Q3 reports.”
Tatsu wrote the first draft with inline citations from the uploaded reports. Polished and sent in 2 hours.
Draft complete. Citations built in.
05 · The terms
Trust is the product.
Built for professionals who need answers they can verify.
Every answer cites its source.
Citations, highlighted previews, and direct links to the original, on every answer, not on request.
Your knowledge stays yours.[3]
Zero data retention with model providers. Private by default. You decide who sees what.
Built to be verified, not believed.
Encrypted at rest and in transit. Delete anytime, no hidden copies.
The final word is yours.
Tatsu reads, drafts, and checks. You verify, decide, and sign. Responsibility never transfers, which is why verification has to be effortless.
06 · The price
Simple pricing.
Start free. Upgrade when you need more.
Free
$0
All features included
- 1 GB knowledge library
- All features, all surfaces
- Web + Google Scholar search
Pro
$60/month
/month
- 100 GB knowledge library
- Access to frontier models
- Generous Tatsulok credits
Most Chosen
Max
$200/month
/month
- 5x Pro's Tatsulok credits
- Access to frontier models
- Priority processing & support
Free plan available. No credit card required.
View Full PricingGuides
Learn how AI with context actually works.
Plain-language guides on context, retrieval, and verifiable answers, written for people who do real work with their own documents.
Verify AI answers
To verify an AI answer, demand a citation to the exact source passage and check the highlighted text against the original document. Here is how.
Read the guide
Give AI the right context
AI forgets because each chat starts blank and only sees what fits its context window. The fix: give it persistent, retrievable, cited context from your own documents.
Read the guide
Private RAG Guide
RAG (retrieval-augmented generation) lets AI search your internal documents and answer with citations to the exact source. Learn how private RAG and verification work.
Read the guide
Ask the questionyou've been holding.
Tatsu drafts, checks, and cites, the signature is yours. Start free.
Sources
[1]Every answer in Tatsulok links back to its sources. So does this page.
[2]The answer shown in 02 is a real product output. The contract is fictional.
[3]Zero data retention with model providers. Read the full commitments: Trust & Security
Written, designed, and cited in Tokyo. Set in Lora & Inter.