Organizations using Silex
Swiss and international legal sources indexed
Sovereign infrastructure for the Swiss legal system
The vision behind Silex
“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 centralized legal database.”
Kyriaki Bongard
Co-Founder & CEO, Silex
Our story
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 Legal research required navigating fragmented databases, outdated tools and manual analysis, even when speed and precision were critical.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 700 law firms, notary offices, tax advisories and corporate legal departments.
01
Born inside legal practice
Designed by practitioners who understand how legal research happens, grounded in structured sources and traceable legal reasoning.
02
Purpose-built AI infrastructure
Specialised models and infrastructure designed for legal research and reasoning, not generic LLMs adapted to legal work.
03
Exclusive legal data and knowledge
Curated Swiss legal sources, up to date in real time, structured data supporting reliable, precise and fast legal research.
Silex in the media
Basik show: In-depth interview
See interview
Ideas forum: When AI meets law
See interview
Will AI revolutionize the legal profession?
Read article
Silex is preparing for the arrival of the virtual lawyer
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Silex helps with legal research
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Silex challenges ChatGPT on legal grounds
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“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.”
Yannick Pfister
Investment Manager, Spicehaus Partners
