company

Where legal research expertise meets purpose-built AI infrastructure

The Swiss AI platform for legal research, built by practitioners  for rigorous legal reasoning.

800+

Organisations  using Silex

800'000+

Swiss and international legal sources indexed

Swiss-built

Sovereign infrastructure for the Swiss legal system

Note from our
co-founder

We built Silex because legal research remains one of the most complex problems in the legal profession, and one of the hardest to solve with AI.

It requires deep domain expertise, reliable access to structured legal sources, and the ability to reason consistently across the various sources at disposal with full traceability and access to source documents.

Generic AI models are not designed for that level of rigour. Silex was built specifically for it, on top of a dedicated centralised legal database.”

Femme blonde en robe noire d'avocat souriante dans un intérieur aux murs sombres.

Kyriaki Bongard

Co-Founder & CEO

Our story

Trois professionnels en costume discutent en regardant un ordinateur portable à une table de conférence.

Developed in stealth since 2023 and launched in 2025, Silex (previously known as Ex Nunc Intelligence) emerged as the first LegalTech from EPFL and was created from a simple observation: the way legal research was still conducted in many law firms and institutions no longer reflects the complexity, pace and expectations of modern legal practice.

Our founding team encountered the same challenge repeatedly in their work. Legal research required navigating fragmented databases, outdated tools and manual analysis, even when speed and precision were critical. What was missing was not more information, but better infrastructure for working with the law.

Today, Silex is used by legal professionals across more than 800 law firms, notary offices, tax advisories and corporate legal departments.

Meet the builders

What makes ‍Silex different

Our AI-powered platform makes legal research simple and efficient.

Ask your question in plain language

State it in French, German, Italian or English. Silex understands legal vocabulary in each.

Silex reasons over relevant Swiss sources

Grounded retrieval across Switzerland's deepest in-house legal corpus, with every answer anchored in cited sources.

III

You build your case

A documented answer with traceable citations, ready to verify, cite and develop into your own legal reasoning.

Silex in media

RTS · Radio Télévision Suisse

Interview

In-depth interview: Basik show

See interview

rts.ch

RTS · Radio Télévision Suisse

Interview

Ideas forum: When AI meets law

See interview

rts.ch

24 Heures

Talk

Will AI revolutionise the legal profession?

Read article

www.24heures.ch

24 Heures

Talk

Silex is preparing for the arrival of the virtual lawyer

Read article

www.24heures.ch

PME

Talk

Silex helps with legal research

Read article

pme.ch

20 Minutes

Talk

Silex challenges ChatGPT on legal grounds

Read article

www.20min.ch

Backed by long-term investors rooted in the Swiss ecosystem

Homme souriant portant un col roulé bleu foncé et un blazer gris dans un bureau flou

Silex is tackling one of the most complex problems in legal technology: trustworthy legal research. By combining deep legal expertise with specialised AI infrastructure, the team is building the foundations for the next generation of legal intelligence.”