Free 4-question trial, no credit card required · Activate it
Chiostro

Legal research that verifies itself.

The research assistant for lawyers and in-house counsel, built on official Italian and European sources.

  • Answers your legal questions, with the official sources.
  • Reads your documents: upload a contract or a pleading and ask.
  • Checks quotations against the source text before they reach you.
From the cloister to the city · Milan

It answers only from official sources, and tells you which.

Normattivalegislation in force
Regional lawssix regions
Constitutional Courtjudgments and orders
EUR-LexEU law
EU Court of Justicejudgments
Court of Cassationselected rulings
Agenzia delle EntrateRevenue Agency · guidance
CONSOBresolutions
COVIPpensions
ANACpublic procurement
ARERAenergy
ARTtransport

One platform for all of your team's research.

From the quick question to the matter that takes a day's work. Every answer arrives with its sources alongside, ready to check.

Research

Ask as you would a colleague.

Write the question with the facts of the case. Chiostro searches current legislation, case law and administrative guidance and answers with numbered references that open the official text.

  • Legislation, case law and guidance together
  • A direct answer in about a minute
  • In Italian and English
670,000+official documents in the database: legislation, guidance and case law
~1 minfor a direct answer; 3-4 minutes for deep research
Quotationschecked one by one against the text of the source
For law firms

Your firm's method, in every answer.

Searches picked up where you left them, case-file documents beside the sources, export to Word for the opinion.

Try it on your own work
For in-house legal teams

Fast answers, with the sources to defend them.

Compliance, contracts, employment and tax questions: a verifiable answer to share with the business.

Try it on your own work
Standards Legal, law firm
“In a legal opinion, a wrong citation costs more than slow research. With Chiostro we start from official sources and every reference opens on the text of the law: that is how we wanted to use artificial intelligence in our firm.”
Elio Viola, avvocato · Partner, Standards Legal · Perugia, Milan, Monza
Security and confidentiality

Professional privilege comes first.

Stored in EuropeYour files are stored on infrastructure in the European Union, kept separate for each customer.
No training on your dataYour questions and documents are never used to train models.
We log the bare minimumTimings and counts needed to run the service, not the content of your matters.
GDPR and AI ActController, providers and transfers are described in the privacy notice.

One subscription, all of Chiostro.

You don't buy one practice area at a time, and there are no modules to add. Every plan opens every source and every feature from day one. Cancel whenever you like with an email to ciao@chiostro.algon.one: the service stays active until the end of the period paid.

Monthly

€199.90 + VAT · / month

No commitment

  • All of Chiostro, no modules
  • Cancel anytime
Start for free

Quarterly

€499.90 + VAT · every 3 months

€166.63 + VAT a month · −17%

  • All of Chiostro, no modules
  • A single payment
Start for free
Most popular

Annual

€1,699.90 + VAT · a year

€141.66 + VAT a month · −29%

  • All of Chiostro, no modules
  • The lowest price
Start for free

All prices exclude VAT, per person. The free trial includes 4 questions with every feature.

Chiostro is built for the daily work of a law firm, and for that it has no limits you will notice. To keep it fast for everyone, use far beyond that of a professional (automated questions, shared logins) may be slowed down and, if it continues, suspended: we always write to you first. The thresholds are set out in the Terms, point 8.

Frequently asked questions

Can Chiostro get things wrong?

Yes, like any tool. That is why every answer carries its linked sources and every quotation is checked against the text before it reaches you. The final judgment remains yours.

Which sources does it answer from?

From official databases: Normattiva, the Constitutional Court, EUR-Lex, selected rulings of the Court of Cassation and the guidance issued by the authorities. The Coverage page says exactly what is included and what is not.

What happens to my clients' data?

Documents are stored in the European Union; to write the answer, the passages needed go to the providers of the artificial intelligence models (including in the United States) under contractual safeguards, never to train them. The privacy notice describes the controller, providers and transfers.

How does the free trial work?

Fill in the form and you receive an email with access. You get the full Chiostro for 4 questions; then you can choose a plan.

How do I cancel?

With an email to ciao@chiostro.algon.one, whenever you like: the service stays active until the end of the period paid.

Four real questions, on your own work.

Put to Chiostro the questions on your desk today. You will see the sources, the checked citations, the reasoning.

  1. Fill in the form
  2. Receive access by email
  3. Ask 4 questions with every feature

How we process your data to activate the trial is described in the privacy notice.

Less time searching. More time deciding.

Ask 4 questions for free