AI legal, or legal AI, covers artificial intelligence tools designed to support the work of legal professionals. It can help find sources, analyse documents, compare clauses, prepare a memo, summarise a file or draft a first version of a legal text.
But in law, speed is not enough. A useful answer must be verifiable, linked to reliable sources and adapted to the context of the matter. Silex was designed with this in mind: a Swiss legal AI platform, built by lawyers to help professionals save time without losing control of their reasoning.
What we should really expect from legal AI
A legal AI assistant can be very useful when it helps prepare the work: finding a rule, analysing a document, organising arguments, comparing several versions or highlighting the important points of a file. It becomes far less reliable if it merely produces an isolated answer, without sources or an apparent method.
The value of such a tool therefore rests on three simple elements: the quality of the sources, data protection and the user's ability to check the result. Good legal AI does not replace professional analysis. It helps make that analysis faster, more structured and easier to verify. The AI for legal professionals page details how this logic applies to the daily work of legal teams.
Why general-purpose AI quickly reaches its limits
A general-purpose tool such as GPT, Microsoft Copilot or an office assistant can rephrase a text, summarise a document or propose a first draft. These functions are useful, but they do not meet all the requirements of legal work.
In law, one must distinguish facts from applicable rules, verify the source, understand the scope of a decision, cite a reference correctly and take context into account. A well-written answer can remain fragile if it relies on a foreign source, an outdated provision, a fabricated precedent or an overly general interpretation. Independent research has measured this: when questioned on verifiable legal points, general-purpose models are wrong in a proportion often between 58% and 88% of answers, while specialised tools combining artificial intelligence with structured documentary sources bring that error rate down to a range of 17% to 33%.
The difference between general-purpose AI and specialised legal AI therefore lies mainly in traceability. The professional must be able to understand where information comes from, why it is suggested and how to verify it.
The most useful applications in practice
In a law firm, a notarial office or an in-house legal department, AI can step in at several points: source research, contract analysis, preparing a memo, translation, summarising documents, comparing files or organising a large matter.
The right use is to entrust it with preparatory tasks, not the final decision. AI can speed up the work, propose a structure and surface useful elements, but the lawyer, jurist or notary must retain validation and interpretation.
The legal analysis page shows how to use AI to review a file more quickly while keeping human supervision.
Legal tech and legal AI: an evolution in method
Legal tech first automated fairly well-defined tasks: forms, databases, document generation, electronic signature or document management. Legal artificial intelligence adds another dimension, since it can understand a question in natural language, analyse content and connect several sources.
This evolution can genuinely improve the efficiency of the work. A lawyer or jurist can prepare an initial search faster, compare several documents or explore different avenues. But AI does not automatically turn content into reliable analysis. Verifying sources, adapting to context and drawing conclusions remain the professional's responsibility.
The needs of law firms are detailed on the AI for lawyers page. In-house teams can, in turn, consult the AI for businesses page.
Sources: the criterion that changes everything
In legal matters, the quality of an AI assistant depends first on the sources it relies on. A pleasant interface or a fluent answer is not enough if the references are imprecise, unverifiable or unsuited to the applicable law.
In Switzerland, Fedlex provides access to federal law. The FDPIC also reminds users that data processing involving artificial intelligence must comply with data protection law, particularly since the revised Federal Act on Data Protection came into force in September 2023. These benchmarks show why a serious tool must be built around reliability, traceability and security.
Swiss sources: Fedlex ; FDPIC on AI and data protection.
Security and confidentiality: a prerequisite, not a bonus
Legal documents often contain sensitive information: contracts, client correspondence, procedural documents, internal files, personal data, trade secrets or elements covered by professional secrecy. An AI tool used in this context must therefore offer clear guarantees.
One needs to know where data is hosted, who can access it, whether it is used to train models, how access is controlled and what encryption measures are in place. For a legal professional, these are not secondary technical questions: they determine whether the tool can even be used.
The Silex security page details Silex's approach: Swiss hosting, zero training on client data, encryption, secure infrastructure and compliance with the requirements of legal practice.
What legal AI must not promise
A serious platform must be clear about its limits. A definitive legal opinion, a contract ready to sign or an answer guaranteed across every area of law should never be presented as a simple automatic output.
AI can reduce research time, organise documents, surface sources and propose a structure for reasoning. It does not replace contextual analysis, legal qualification or professional responsibility. This distinction is what allows AI to be used as a genuine working tool, without giving it a role it should not have.
Criteria for choosing the right tool
Before choosing legal AI, it is worth looking beyond the apparent quality of the answers. A good tool must fit into daily practice and remain controllable by the professional.
- Sources: are the legal references verifiable and suited to the applicable law?
- Context: does the tool distinguish facts, law, legal doctrine, case law and assumptions?
- Data: are documents and personal data protected and excluded from training?
- Security: are the technical and contractual guarantees documented?
- Real-world use: does the tool simplify daily work or add new complexity?
- Control: does the professional retain control over the final answer?
The Silex product page presents the available features: AI legal research, contextual analysis, structured sources, translation, matters and integration of internal data.
Silex: a Swiss legal AI for legal professionals
Silex is designed for lawyers, jurists, notaries, in-house legal departments, law students and institutions who want to use artificial intelligence without compromising legal rigour. The platform combines research, analysis, assisted drafting and structured sources within a secure environment.
Its positioning is clear: to offer a tool designed for Swiss law, built by practitioners, with particular attention paid to sources, confidentiality and verification. The goal is to save time while retaining control of one's reasoning.
To evaluate Silex on your own use cases, you can book a demo. If you are torn between a general-purpose AI and a specialised platform, the ChatGPT vs Silex comparison helps clarify the differences in method, security and reliability.
FAQ: AI legal
What is AI legal?
AI legal is an artificial intelligence tool applied to law. It can help research legal sources, analyse documents, prepare drafting or structure reasoning.
What is the difference between AI legal and general-purpose AI?
General-purpose AI can rephrase or summarise. Specialised legal AI must go further: reliable sources, legal context, confidentiality and a method suited to legal professionals.
Can AI legal replace a lawyer or jurist?
No. It can support research, analysis and drafting, but strategy, advice, validation and responsibility remain human.
Can legal documents be submitted to any AI tool?
No. Legal documents may contain personal data, confidential information or elements covered by professional secrecy. A secure environment and clear guarantees are required.
Is Silex suitable for legal professionals?
Yes. Silex is a Swiss legal AI platform designed for legal professionals, with particular attention paid to sources, security and verification.
