The Reef 2 is compatible with the following car seats:
- Silver Cross Glide Plus 360
- Cybex Cloud G i-Size
- Cybex Cloud T i-Size
- Avionaut Cosmo 2.0
- Avionaut Pixel Pro 2.0
- Maxi Cosi Pebble 360 Pro2
- Maxi Cosi Coral i-Size
- Maxi Cosi Cabriofix i-Size
- Maxi Cosi Pebble Slide Pro
- Maxi Cosi Coral Slide Pro
- BeSafe Go Beyond
- BeSafe Go Beyond 2
- Britax BabySafe Pro
- Nuna Arra Next

The Silver Cross Simplicity and Silver Cross Dream car seats can also be used on the Reef chassis using the Simplicity/Dream Car Seat Adaptors.