Sirius Neosight
Lyon, FR · 3 known investors
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Sirius NeoSight develops a patented technology that measures cell membrane fluidity using a fluorescent molecule to detect, isolate and characterise Circulating Tumour Cells (CTCs) from blood samples. Aimed at oncologists, the technology supports early cancer detection, monitoring of recurrence and treatment resistance, and personalised therapy selection for metastatic and aggressive cancers.
Founders & leadership
JL
Jean-Guillaume LafayCo-founder
SL
Stéphane LegasteloisCo-founderStéphane Legastelois holds a PhD in immunology from the University of Lyon and completed management training at EM Lyon Business School. He brings 25 years of life sciences experience, including roles as R&D manager and sales & marketing manager at Merck, and has founded or led multiple biotechnology companies including Indicia Biotechnology, a contract research organization focused on assay development and immunogenicity assessment.
Investors · 3
Frequently asked questions
- What does Sirius Neosight do?
- Sirius NeoSight develops a patented technology that measures cell membrane fluidity using a fluorescent molecule to detect, isolate and characterise Circulating Tumour Cells (CTCs) from blood samples. Aimed at oncologists, the technology supports early cancer detection, monitoring of recurrence and treatment resistance, and personalised therapy selection for metastatic and aggressive cancers.
- Who founded Sirius Neosight?
- Sirius Neosight was founded by Arnaud Vigneron, David Gueyrard, Jean-Guillaume Lafay, Stéphane Legastelois.
- Who are Sirius Neosight's investors?
- Sirius Neosight's investors include Angels Santé, Octalfa, GO Capital.
- Where is Sirius Neosight headquartered?
- Sirius Neosight is headquartered in Lyon, FR.





