This document discusses ST's Teseo family of dual-frequency GNSS platforms for high-accuracy positioning and safety compliance. ST has pioneered multi-constellation receivers and developed proprietary sensor fusion technology. Their latest Teseo APP platform achieves sub-meter positioning accuracy using automotive-grade multi-band chips. Test results on German autobahns and in suburban areas show the Teseo V and Teseo APP achieving decimeter-level accuracy using precise point positioning techniques.