While the above products are free, you still need to check the licence for their use - you should find licence details with the products themselves.
Free data from theCopernicus Climate Change and Atmosphere Monitoring Services
If you want to explore the open and free of charge (see Copernicus Licence for details) data of the Copernicus Climate Change Service (C3S) please have a look here:
If you want to explore the open and free of charge (see Copernicus Licence for details) data of the Copernicus Atmosphere Monitoring Service (CAMS) please have a look here: