Incident / 01 · the invented clause
“The assistant summarized a penalty clause that wasn't in the contract. The client noticed first.”
Unverifiable
AI document intelligence · by LX Apps
Answers from your documents. Sources you can check.
LEX reads your contracts, emails and reports, then answers in plain language, citing the exact source. When the answer isn't in your documents, it says so instead of inventing one.
Early access · Encrypted on EU data centres · Never used to train AI models
lex › meridian construções › alameda
EU · encryptedProduct demo animation
The problem
You already tried an AI assistant. Then you fact-checked it once.
Generic AI tools answer everything, including things they don't know. One invented detail costs more than a thousand fast answers save.
Incident / 02 · the wrong project
“Asked about one client, got details from another. Impossible to tell which files it read.”
Unverifiable
Incident / 03 · the archaeology
“An afternoon lost in inboxes and shared drives, reconstructing something the company already knew.”
Buried
The LEX standard
“Every claim carries a citation. Every citation opens the source. No citation, no claim.”
Checked ✓
An answer you can't verify is a rumor with good grammar.
Q: "What warranty period did we agree with this supplier?"
A typical assistant
The standard warranty period agreed with this supplier is 12 months from invoice date, in line with your usual terms.
Sounds right. Cites nothing.
LEX
A 24-month warranty applies, counted from delivery. It extends to 36 months for structural components under the supplier framework agreement.
acordo-quadro §4.1condições-fornecimento §9The toggle changes the documents. Only one assistant notices.
Pillar 01 · verifiable answers
Built to say "I don't know." On purpose.
Refusing to invent is engineered, tested behavior in LEX, not a lucky accident. Flip the toggle: one assistant changes its answer, the other only changes its confidence.
Citations on every answer
Each claim links to the exact passage it came from. Opening the source is one click.
Honest abstention
No answer in the documents means no answer, stated plainly. Never a plausible guess.
How it works · chain of custody
Every answer is only as honest as the pipeline behind it.
Follow one batch of documents from upload to answer. Nothing enters unchecked, and everything is stored encrypted in the EU.
01
Ingest
Contracts, emails, scans, tickets. Bulk onboarding included.
02
Gate
Every file graded at intake; failures quarantined, never indexed.
03
Organize
Clients, projects, suppliers: your real structure, any depth.
04
Store in the EU
Encrypted on EU data centres, per-client keys, audit trail.
05
Ask
Cited answers in your language. Chat today; API coming soon.
Pillars 02 & 03 · structure & isolation
It knows which client you're asking about. And which ones you're not.
LEX mirrors your real structure, clients, projects and suppliers at any depth, so you can ask across a whole relationship or drill into a single job site. And one client's data can never appear in another's answers: isolation is enforced at the core and covered by automated tests.
Scoped questions
Point a question at one project, one client, or everything you're allowed to see.
Isolation by construction
Client separation is an architectural guarantee, verified by automated tests.
scope:
Q: "Which contracts include price-revision clauses?"
Price-revision clauses appear in three contracts, across two clients:
meridian/alameda · contrato-empreitada §11meridian/cascais · subempreitada §8outra-cliente · fornecimento §5
same question · three scopes · three honest answers
Pillar 04 · agentic depth
When a snippet isn't enough, it goes back and reads the whole file.
When first excerpts don't settle a hard question, LEX goes back, reads the complete documents and reconciles them against each other, the way an analyst would. And it all happens in the open: you watch the search, step by step, before the answer arrives.
Whole-document reading
Full contracts and reports when excerpts fall short.
Cross-source reconciliation
Amendments, minutes and originals weighed against each other before anything is stated.
A process you can watch
The search trail is visible in every deep answer. No black box.
question spans multiple documents · going deeper
opening full documents: contrato-empreitada, aditamento-02, ata-obra-14
discrepancy flagged: the addendum's notice window exceeds the contract's
answer assembled from 3 sources
Retention is released 60 days after provisional acceptance, per Addendum 02. Note: the addendum's notice window is longer than the main contract's.contrato-empreitada §7.3aditamento-02 §2ata-obra-14
depth you can watch, sources you can open
The trust ledger
Written for the person who has to sign off on this.
Six commitments, stated plainly. Forward them to your DPO.
Residency
Stored in the EU.
Documents and indexes live on EU data centres in Germany.
Encryption
Encrypted at rest.
Per-client access keys: separation is cryptographic, not just logical.
Audit
Every access on the record.
A full trail of who asked what, and when.
No training
Your documents train nothing.
Customer data is never used to train AI models.
Lifecycle
A clean exit, guaranteed.
Offboarding includes full data export and certified deletion.
GDPR-first
Compliance by engineering.
Data protection shaped the architecture, not the sales deck.
For regulated teams
Private deployment available: when nothing may leave your infrastructure, LEX runs entirely inside it.
The studio behind LEX
LEX is our product. Building is our craft.
LX Apps is a Portuguese software studio. We build LEX, and we build commerce tooling and custom systems for clients, to the same standard.
LX Apps · Lisboa, PT
Shopify apps
Custom apps for serious stores, including Print-on-Demand automation.
Explore our Shopify workCustom software
When off-the-shelf stops fitting, we build the system your operation actually needs.
Early access
not in your documents· "I won't guess."
Bring the question your files can answer, and one they can't.
In a live demo, you'll watch LEX cite what it knows and admit what it doesn't. That second part is the demo.
30 minutes · live product walkthrough · no slides
Read how we thinkLEX is in early access. No invented logos, no fabricated testimonials, no slides: verifiable claims only.