Amsterdam-Based Siilo Raises a $10.5 Million Series A


Siilo (, the Amsterdam-based secure collaboration app for healthcare professionals, has raised a $10.5 million Series A funding round. Lead investor in the round is European digital health VC Heal Capital, backed by Germany’s private health insurers, and it is the VC’s first investment following the Berlin-based fund’s launch in 2019. Also participating in the round are Philips Health Technology Venture Fund and current investor EQT Ventures. 

With the investment, Siilo plans to expand its product offering to better support case-based collaboration and knowledge-sharing on its platform, as well as increase network growth across Europe, specifically DACH, BENELUX, and the UK and Ireland.

Siilo was founded in 2016 by former surgery resident Joost Bruggeman (CEO) and Arvind Rao (CFO). Having experienced the fragmented healthcare system and outdated methods of communication—such as fax, pagers, and landlines—firsthand, Joost recognised the need for a secure, easy-to-use messaging app designed specifically for healthcare professionals. He and the Siilo team are on a mission to improve the lives of modern healthcare professionals and ultimately patient care by simplifying their workflows and democratising access to expertise and experience.




“We believe there is a massive opportunity for healthcare to operate as a collaborative network,” Bruggeman explains. “We started by connecting professionals treating individual patients, but during the acute phase of the pandemic, we’ve also been able to play a critical role in connecting different levels of healthcare to facilitate faster decision-making and information-sharing. With Siilo, frontline care workers, public health officials, and everyone in between are able to practice medicine together.”

The Siilo Messenger app is free for individuals and teams to coordinate patient care, expand their professional network, and significantly reduce time-to-decision by exchanging best practices. Siilo Connect is the company’s subscription service for healthcare organisations and associations where administrators can facilitate staff-wide collaboration and consultations while maintaining organisational compliance. 

Siilo is the largest medical network in Europe with more than a quarter of a million healthcare professionals. Each month, more than 20 million messages are exchanged in more than 16,500 clinical chat groups or directly between users. Siilo Connect is used for secure departmental collaboration within renowned academic institutions such as Erasmus Medical Centre Rotterdam, Berlin-based Charité, and East Lancashire Hospitals NHS Trust.

When asked on his thoughts for Siilo’s future impact on the healthcare industry, Bruggeman remarks:

“We’re only just starting to uncover the different ways technology can facilitate collaboration and simplify workflows in healthcare, and we’re excited to increase our product offering and member network with the support of our newest investors, who bring a wealth of insights and experience around scaling innovative healthcare solutions.”