Swisslex and Silex are two Swiss solutions for legal professionals, but they do not play the same role. Swisslex is a major legal research platform and Swiss legal database providing access to case law, doctrine, journals, commentaries and advanced search tools. Silex is a Swiss legal AI designed to help practitioners formulate a question, analyze sources and produce a structured legal answer.
The comparison therefore needs to be precise: Swisslex is primarily a very rich documentary gateway to Swiss law, enhanced with search and AI features. Silex is primarily an AI legal assistant for research, analysis and reasoning in Swiss law.
Quick comparison: Swisslex and Silex
Swisslex and Silex can both be useful in Swiss legal practice. The main difference lies in the workflow: Swisslex helps find and consult legal documents in a structured database; Silex helps turn a legal question into sourced analysis, synthesis and usable reasoning.
Positioning
Swisslex
Swiss legal research platform and comprehensive document database.
Silex
Swiss legal AI focused on research, analysis and legal reasoning.
Sources
Swisslex
Federal and cantonal case law, specialist journals, commentaries, books and doctrine.
Silex
Structured and verifiable Swiss legal sources to produce sourced answers.
AI
Swisslex
Semantic search, chatbot, summaries, translations, deep research and entity recognition according to its AI statement.
Silex
AI legal assistant designed to query, analyze, synthesize and reason in Swiss law.
Main use
Swisslex
Find, filter, consult, cite and follow updates in Swiss legal sources.
Silex
Obtain a structured, sourced legal analysis adapted to a question or matter.
Confidentiality
Swisslex
AI operated on Swiss servers with adapted open-source models, without training on user data according to Swisslex.
Silex
Swiss hosting, confidentiality and zero training on customer data.
What is Swisslex?
Swisslex presents itself as Switzerland’s most comprehensive legal research platform. Its product page states that more than 1,500 legal professionals use its search and analysis tools daily to find information in more than 1,104,217 interconnected documents.
Swisslex also states that it contains decisions of the federal courts and most cantonal courts from the past 60 years, around 85 specialist journals, approximately 400 legal commentaries and more than 3,000 specialist literature works. A separate collection also covers EU law and decisions of the Court of Justice of the European Union.
Swisslex search features
Swisslex offers structured research with several tools: Smart Search, metadata search, search operators, advanced search, filters by practice area, legislation, case law, journal, series, author or commentary. The features page also mentions cross-lingual search, search history, result previews, citations, similar documents, favorites, PDF downloads and alerts.
These features are particularly useful for legal professionals who want to control a complete documentary search themselves: identify the right sources, filter results, navigate between references, cite a passage and follow case law or doctrinal developments.
Swisslex and artificial intelligence
Swisslex publishes an AI statement dated March 22, 2026. It states that Swisslex uses AI in several areas, including on its online platform for automated and contextual generation and presentation of content: semantic search, chatbot, summaries, translations, deep research and entity recognition.
The same statement specifies that the AI features of the online platform are operated on Swisslex’s own servers in Switzerland, using adapted open-source models. Swisslex also states that using these features does not involve training AI models on user data or exchanging data with AI providers.
Limits to know in Swisslex
Swisslex is a powerful document database and legal research platform, but research remains legal work. Swisslex’s terms state that database content or legal information is generally provided by third parties, then prepared, enriched, updated and maintained by Swisslex. They also state that Swisslex does not guarantee truthfulness, absence of errors, timeliness, selection, precision, completeness or anonymity of content, services or functions, including AI.
This is not unusual for a legal database: it simply reminds professionals that they must verify sources, check citations, assess currency and assume final legal validation. This is particularly important when AI is involved in research or synthesis.
Silex: Swiss legal AI focused on reasoning
Silex starts from another angle. The goal is not only to provide access to documents, but to support the professional in building a legal answer: ask a question, identify relevant sources, connect them to the problem, synthesize results and formulate a clear analysis.
This difference matters in practice. A lawyer, notary or in-house counsel is not always looking for a list of results; often they are looking for a reasoned answer, grounded in the right sources, that they can then verify, adapt and use in a matter. This is precisely where Silex positions itself.
To go further, see legal AI, legal analysis and AI case law.
Document database or legal assistant?
The Swisslex vs Silex comparison should not be caricatured. Swisslex is a major document tool for accessing Swiss law, doctrine and case law. Silex is an AI assistant that helps formulate and structure legal analysis from sources.
In practice, the two approaches can be complementary. Swisslex can be used to explore an extensive document database, consult commentaries or follow updates. Silex can be used to accelerate reasoning, prepare a synthesis, compare arguments or obtain a first sourced analysis on a Swiss legal question.
Confidentiality and data
Swisslex’s AI statement says that its online AI features are operated on its own servers in Switzerland, with adapted open-source models, without model training on user data and without exchanging data with AI providers. It also states that users should not transmit personal data, trade secrets or confidential matter-related data unless the relevant feature is expressly intended for that purpose.
Silex also emphasizes confidentiality, Swiss hosting and zero training on customer data. For law firms, notarial offices or legal departments, the comparison must always be made on concrete elements: hosting, subprocessors, logs, retention, permissions, auditability and contractual terms.
When Swisslex may be the right choice
Swisslex may be particularly relevant if your priority is access to a very broad Swiss document database: decisions, journals, commentaries, doctrine, advanced filters, cross-lingual search, alerts and similar documents. For a legal professional who wants to conduct in-depth documentary research themselves, Swisslex is a reference tool.
Swisslex is also useful when doctrine and commentaries play a central role: preparing opinions, checking a legal position, monitoring, case law research or exploring a specialized field.
When Silex may be the right choice
Silex may be more suitable when your main need is to quickly obtain a structured, sourced and usable Swiss legal answer. Instead of starting from a list of results, you start from a question or legal problem, and the AI helps build the analysis.
Silex is also relevant if the team wants to save time in daily legal reasoning: understanding a provision, summarizing case law, preparing a memo, comparing arguments or analyzing a document. For professional use cases, see also AI for lawyers and AI notary.
Swisslex vs Silex: how to decide?
- Documentary research: if your priority is access to a broad Swiss database, Swisslex is highly relevant.
- Legal analysis: if your priority is a structured and sourced answer, Silex directly addresses that need.
- Doctrine: if you need journals, commentaries and books, Swisslex has a clear documentary advantage.
- Workflow: if you start from a legal question to solve, Silex offers a more assistant-oriented approach.
- Confidentiality: check the exact terms of use, especially if matter data or trade secrets are involved.
To evaluate Silex on concrete Swiss law cases, you can book a demo. If you also compare with general AI tools, ChatGPT vs Silex explains why Swiss legal specialization changes the use case.
FAQ: Swisslex vs Silex
Is Swisslex a legal AI?
Swisslex is first a Swiss legal research platform and document database. It integrates AI features, including semantic search, chatbot, summaries, translations, deep research and entity recognition according to its AI statement.
What is the main difference between Swisslex and Silex?
Swisslex provides access to a very broad Swiss document database and research tools. Silex is a Swiss legal AI focused on building an analysis and a sourced answer.
Does Swisslex use user data to train its AI models?
Swisslex states in its AI statement that using its AI features does not involve training models on user data or exchanging data with AI providers.
Are Swisslex and Silex complementary?
Yes. Swisslex can be used to explore an extensive Swiss document database, while Silex can help analyze sources and formulate a structured legal answer.
Which tool should you choose for fast Swiss legal research?
If you mainly need documents, commentaries and case law, Swisslex is highly relevant. If you need sourced analysis starting from a legal question, Silex is designed for that use.
