At least three commercial organizations have initiated testing of the Galileo Open Service Navigation Message Authentication (OSNMA) service, concurrently with the European GNSS Agency (GSA) and the European Space Agency (ESA) themselves. Results to date show success. OSNMA offers end-to-end authentication on a civilian signal, protecting receivers from spoofing attacks. OSNMA is pioneered by the Galileo Program. Galileo OSNMA is an authentication mechanism that allows GNSS receivers to verify the authenticity of the information transmitted by the satellite itself making sure that the data they receive are indeed from Galileo and have not been modified in any way. OSNMA is a novel and unique service provided free-of-charge to all users, contributing to increase the overall security of GNSS-based applications and services.