Syntony know-how was inherited from 15 years of R&D and collaboration with industrial leaders. At some point, the need for bespoke projects requiring high GNSS expertise to develop simulators based on Software Defined Radio has been the milestone of Syntony's creation. Some of the leaders quickly went for this innovative approach that brings unique advantages for flexibility, upgradability, and cost-effectiveness. The expertise developed was then used for developing a range of other products: from simulators to recorders and players, as well as software-based GNSS receivers.