SureFlap Microchip Cat Flap Review: Worth It? (October 2026)
The SureFlap Microchip Cat Flap suits homes that want to let a recognized cat in while blocking unprogrammed animals. Check your cat’s chip format and the 4 3/4 by 5 5/8 in opening before choosing it.
On this page (6 sections)
The SureFlap Microchip Cat Flap is a collar-free entry door for cats with compatible implanted microchips. It reads a cat’s ID when the cat enters, stores up to 32 identities and is designed to block unrecognized animals.
Its main checks are chip compatibility and fit. The flap opening is 4 3/4 inches high by 5 5/8 inches wide, and the door uses 4 AA alkaline batteries, which aren’t included.
If you want an electronic cat door that recognizes your cat without a collar tag, this is a focused option. For a timer or more manual lock settings, compare the PetSafe and Cat Mate alternatives below.
The SureFlap Microchip Cat Flap at a glance
The SureFlap reads a compatible microchip on entry and lets recognized cats return without wearing a collar tag. It screens entry only, so cats can leave freely.
SureFlap Microchip Cat Flap: Best for chip-based entry
- Reads compatible microchips on entry
- Stores up to 32 identities
- 4 3/4 x 5 5/8 in flap opening
- 4 AA batteries
A collar-free option that reads a cat's compatible microchip on entry. Check the opening dimensions and confirm your cat's chip format before buying.
Pros
- Recognizes compatible implanted microchips
- Does not require a collar tag for chipped cats
- Stores up to 32 identities
- Can be installed in doors, windows or walls with suitable accessories
Cons
- Uses 4 AA alkaline batteries, not included
- Only screens entry, so cats can exit freely
- Opening size may not suit every cat
The flap opening measures 4 3/4 inches high by 5 5/8 inches wide. The door can be installed in doors, windows or walls with suitable accessories, but the right accessory depends on the installation.
Who should consider this SureFlap cat flap?
Consider it if your cat is chipped, you want selective entry and the opening fits your cat. It may also work for multi-cat homes because it stores up to 32 identities.
Skip it if you need a timed curfew or a lock mode that prevents your cat from going out. The SureFlap description identifies selective entry, while the Cat Mate has a programmable timer and PetSafe offers four manual lock settings.
Our review score weighs the stated features and fit against what shoppers want from a microchip cat flap. We compared the specs and controls, rather than testing the doors in a home.
Will it recognize your cat’s microchip?
The SureFlap recognizes 9-digit Avid Secure, 10-digit FDXA and 15-digit FDXB microchips. Confirm your cat’s chip number before buying, especially if you don’t have the registration paperwork.
Your veterinarian, a pet shelter or an animal rescue may be able to check the chip number. The SureFlap can also be programmed with a separately sold collar tag if your cat doesn’t have a microchip.
The door learns identities through one-button programming and can store up to 32 cats. That capacity gives a multi-cat household room to program several pets, though each one still needs a compatible chip or collar tag.
The SureFlap’s selective entry is useful when neighborhood cats try to come indoors. It does not stop your cat from leaving, so think of it as an entry filter rather than a full curfew system.
For a wider comparison of chip-controlled options, see our guide to the best microchip cat doors. It can help you compare access controls and choose a fit for your household.
Is the opening large enough for your cat?
The flap opening is 4 3/4 inches high by 5 5/8 inches wide, so measure your cat and the route before choosing this door. The cat must be comfortable passing through the flap, and the frame needs space around the cutout.
The overall product measures 8.94 x 8.74 x 4.92 inches. Don’t use the overall frame dimensions as the clear opening size; the cat passes through the smaller flap.
Measure the planned installation area, too. Existing holes, door thickness and the material you’re cutting can affect which accessories or installation method you need.
If you’re deciding between a pet door and a cat-sized flap, our guide to choosing the right pet door covers how to match the opening to your animal and entry point. For another SureFlap comparison, read SureFlap pet door vs cat flap.
How does the SureFlap compare with PetSafe and Cat Mate?
The SureFlap stands out for its stated chip formats and 32-identity memory. PetSafe adds four manual lock modes, while Cat Mate’s timer can control access at set times.
| Model | Main access feature | Useful detail | Check before choosing |
|---|---|---|---|
| SureFlap Microchip Cat Flap | Recognizes compatible chips on entry | Stores up to 32 identities | Opening is 4 3/4 x 5 5/8 in |
| PetSafe Microchip Cat Door, 4-Way Lock | Reads 15-digit microchips | Four manual lock settings; programs up to 40 pets | Special materials need additional accessories |
| Cat Mate Elite Microchip Cat Door with Timer | Selective entry with timer-controlled locking | Set access times | Designed for small to medium cats; check cut-out size |
The PetSafe is a better match if you want to set the door to locked, unprotected, enter-only or exit-only. It reads 15-digit microchip IDs and programs up to 40 pets; metal, glass, brick and wall installations require additional accessories.
The Cat Mate is worth comparing if you want a timer to set access times, such as keeping cats indoors overnight. It allows all cats to exit freely while restricting entry to microchip-recognized cats.
For a closer side-by-side look, use our SureFlap vs Cat Mate comparison. Choose by the access control you need, then check that the opening and installation match your home.
What should you check before installing it?
Check chip compatibility, flap clearance and installation material before cutting or ordering accessories. The door supports installation in doors, windows or walls, with compatible accessories available for some setups.
Measure the full frame and the intended opening. If you’re replacing an existing flap, compare the old cutout with the new dimensions and confirm whether it can be reused.
The SureFlap runs on 4 AA non-rechargeable alkaline batteries. The estimated life is up to 12 months depending on use, and a red flashing light signals when they need replacing.
Use the installation instructions for your specific door, window or wall. If the surface is glass or masonry, check the needed accessories and installation requirements before making a cut.
Is the SureFlap Microchip Cat Flap worth choosing?
Choose the SureFlap if your cat has a compatible microchip and you want selective entry without a collar tag. Its 32-identity memory also gives it room for multiple cats.
Choose PetSafe if four manual lock modes matter most, or Cat Mate if timer-based access fits your routine. First measure the opening and confirm your chip format, then see our automatic pet door guide for more electronic options.
Frequently asked questions
Does the SureFlap Microchip Cat Flap work with every microchip?
It works with 9-digit Avid Secure, 10-digit FDXA and 15-digit FDXB microchips. Check your cat’s chip number with your veterinarian, shelter or rescue if you’re unsure.
The SureFlap can also use a separately sold programmable collar tag for cats without a microchip.
Can the SureFlap Microchip Cat Flap keep other cats out?
It reads a programmed cat’s identity on entry and is designed to block unrecognized animals from entering. The flap screens entry only, so cats can still exit freely.
If you want scheduled access or different lock modes, compare alternatives with those controls before choosing.
What size is the SureFlap cat flap opening?
The flap opening is 4 3/4 inches high by 5 5/8 inches wide. Measure your cat and the planned entry route, then compare those figures with the opening before buying.
The overall frame is larger than the opening, so allow room for the frame during installation.
Does the SureFlap Microchip Cat Flap need batteries?
Yes. It uses 4 AA non-rechargeable alkaline batteries, which are not included.
SureFlap gives an estimated battery life of up to 12 months depending on use, and a flashing red light indicates low batteries.
Keep suitable replacement batteries available.
