Both Rivian vehicles (R1T and R1S) are compatible with both the regular J1772 connector as well as the DC fast charge CCS connector.
The vehicles can charge at a maximum of 48A/240V (11.5 kW) through its J1772 connector. I recommend exploring third party Wall chargers as the Rivian one is now priced beyond market, and there isn't anything special about it. Look for a Wall charger than can deliver 48A (which means being connected to a 60A breaker). Click here to see a page about EVSEs with a list of brands at the bottom.
Rivian also bundles a very capable portable charger with the vehicles. It has two removable plug pigtails to allow you to charge from a standard 15A household receptacle (NEMA 5-15) at 12A/120V, or from a 50A/240V receptacle (NEMA 14-50) at 32A/240V.
WARNING: As of February 2023, Rivian's vehicle software has various user interfaces glitches and bugs that can cause the Rivian portable charger to attempt to draw 32A when using the NEMA 14-50 adapter even if the user has selected a lower amperage (for example when using a plug adapter on a dryer receptacle than should only draw 24A). This can cause breakers to trip. Until these glitches get fixed, double and triple check the amp settings in the vehicle before attemping to charge since the Rivian software will want to reset the amps to 32A whenever it can, and don't leave it plugged in once your charge cycle is complete.
On the road, the car can fast charge up to 220kW through its DC fast charge CCS port.
There is another type of charger you can charge at with the right adapter.
Tesla has spent years installing and building a proprietary destination charging network at restaurants, hotels and businesses (not to be confused with their Supercharger network, which is different, and cannot currently be used by non Tesla vehicles). As of 2023, they have more than 35,000 locations that can provide (usually) free charging at a 32 amp or more charge rate. In addition, many Tesla owners will have installed a Tesla specific charger in their houses.
Non Tesla vehicles can also use these destination chargers if you have one of the following adapters (all three of these do the same thing, pick one):
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