Satellite-based AIS vessel locations

What are some providers for satellite-based AIS data? What is the difference between terrestrial & satellite AIS data?

Global providers for satellite-based AIS data, such as Spire Global, Orbcomm, and ExactEarth, are transforming maritime tracking with high-accuracy and real-time information. Unlike terrestrial AIS data, limited by a short-range of approximately 74 kilometers due to the earth’s curvature, satellite AIS data offers extensive coverage, capturing global maritime movements with no geographical constraints. As such, satellite AIS data significantly broadens surveillance capabilities, ensuring robust maritime safety and security.

What I also wonder is whether the new maritime satellite internet providers like “Starlink Maritime” or the likes of it, will eventually replace the current AIS system. I wonder how long before the AIS system becomes obsolete…