Founded in 2016 and headquartered in Amsterdam, Siilo is a secure and GDPR compliant medical messaging app designed to help healthcare professionals and teams better collaborate on complex cases, improve patient care, and share knowledge in a compliant way. Today, Siilo is the largest medical network in Europe, with over a quarter-million active users who, to date, have exchanged over 1 billion messages. While the Siilo Messenger app is free for individual users to download, Siilo also partners with medical associations like AGIK and KAVA, and hospitals like Charité, UMC Utrecht, and Erasmus MC to deliver organisational and departmental collaboration.