Our verdict
Pick SureFlap if your cat's chip might be a 9 or 10-digit type, since it reads more chip standards. Pick PetSafe if all your cats have 15-digit chips and you want to store up to 40 pets.
The central trade-off
Chips. SureFlap reads 9 (AVID Secure), 10 (FDX-A) and 15 (FDX-B) digit chips; PetSafe reads 15-digit chips.
Pets stored. PetSafe states up to 40 programmed pets.
Locks. Both have 4-way manual locks; neither controls exit per cat (SureFlap DualScan does).
Side by side
| Specification | SureFlap Microchip Cat Flap | PetSafe Microchip Cat Door |
|---|---|---|
| Dimensions | 8.94 x 8.74 x 4.92 inches; 1 pounds | 4.8 x 8.66 x 9.41 inches; 1.76 pounds |
| Power | Not stated by the maker | Not stated by the maker |
| Weight | 16 ounces | 1.76 pounds |
| Material | Plastic | Not stated by the maker |
Values are the makers' published specifications. "Not stated" means the maker doesn't publish it.