Microchip Pet Doors vs Collar-Activated Flaps
Three different technologies get sold as one category. What microchip readers, collar magnets and plain flaps each actually solve, and when the cheapest option is the right one.
There are three different technologies sold under the general heading of "selective pet door", and they are frequently compared as if the only difference were price. They are not the same product. One reads an implanted microchip, one reads a magnet or RFID tag on a collar, and one reads nothing at all.
Choosing between them is mostly a question of what you are trying to keep out.
The short version
- Best value microchip door: Cat Mate Microchip Cat Flap 360 — microchip selectivity at roughly a quarter of the premium price.
- Best premium: SureFlap Microchip Pet Door — the most reliable reader and the best app ecosystem, at a price to match.
- Best collar-based option: Cat Mate Electromagnetic Cat Flap — cheaper, simpler, and dependent on your cat keeping its collar on.
- Best unrestricted flap: PetSafe Original Staywell — if nothing needs excluding, selectivity is money spent on a problem you do not have.
Compared at a glance
| Door | Selectivity | Price (AUD) | Needs collar | Main downside |
|---|---|---|---|---|
| Cat Mate Microchip 360 | Implanted microchip | $97.09 | No | Battery-powered reader |
| SureFlap Microchip | Implanted microchip | $361.90 | No | Price |
| Cat Mate Electromagnetic | Collar magnet | $81.11 | Yes | Collar loss defeats it |
| PetSafe Microchip Cat Flap | Implanted microchip | $133.43 | No | Lowest rating of the group |
| PetSafe Staywell | None | $60.99 | No | Lets anything through |
Prices checked 8 October 2026 on Amazon AU. Confirm on Amazon before buying — we found at least one of these had moved since our last check.
The actual decision
If the problem is a neighbourhood cat coming in, you need selectivity, and microchip is the version that cannot be removed, lost or copied. This is the most common reason people upgrade.
If the problem is your own cat going out at the wrong time, you want a timer or a curfew feature, which is a different axis from selectivity.
If the problem is wind, rain or heat loss, you want a well-sealed flap with a magnetic closure, and selectivity is irrelevant.
If there is no problem and you are future-proofing, buy the cheap flap. We would rather tell you that than upsell a $361 door.
Microchip versus collar, honestly
Collar-based flaps are genuinely cheaper and genuinely work. The failure mode is simple: the collar comes off. Safety collars are designed to release under load, which is correct for the cat and inconvenient for the door. A cat that loses its collar is locked out until you replace the tag.
Microchip readers avoid that entirely by reading the implant your cat already has. The trade-offs are a slightly slower read, a dependence on batteries, and a more fiddly installation — the reader needs the chip to pass close enough, which means mounting height and frame material matter.
One Australian-specific note: if your cat was microchipped interstate or overseas, confirm the chip standard is supported before buying. Most modern doors read the common standards, but it is worth two minutes to check rather than returning a door cut into your wall.
Individual assessment
Cat Mate Microchip Cat Flap 360 — $97.09, 4.3 from 5,879 ratings. New to our coverage and the value pick of the category. A large, settled review sample and microchip selectivity at a third of the SureFlap price. Complaints cluster on battery consumption and on read reliability with thick doors.
SureFlap Microchip Pet Door — $361.90, 4.4 from 6,828 ratings. The most consistently praised reader and the best choice if you have had read failures with something cheaper. Hard to justify unless selectivity has already failed you once.
Cat Mate Electromagnetic Cat Flap — $81.11, 4.1 from 1,730 ratings. The collar-based alternative, included here because it is the thing people are actually comparing microchip doors against. Works well; depends entirely on the collar staying on.
PetSafe Microchip Cat Flap — $133.43, 4.4 from 2,654 ratings on our last check. Sits awkwardly between the Cat Mate and the SureFlap on both price and reliability. We would take the Cat Mate at this point. Note this listing's price had moved by the time of our October check, which is a good reminder to confirm before buying.
PetSafe Original Staywell — $60.99, 4.4 from 6,196 ratings. No selectivity, excellent seal, very well reviewed. The right answer more often than the category's marketing suggests.
Installation notes most guides skip
Glass, metal and brick each need a different mounting approach, and in a rental you may need permission for any of them. Microchip readers can be affected by nearby metal. Measure the shoulder height of your cat, not the flap, to get the mounting height right.
FAQ
Will a microchip door work with a dog? Some models are dog-sized; these are cat flaps. Check the aperture.
What happens in a power or battery failure? Most microchip doors fail to a manually lockable state. Check which state your model fails to before installing.
Can two cats use one door? Yes — all the microchip models here store multiple chip IDs.
Methodology
We compared reader technology, published chip-standard support, aperture dimensions and the complaint patterns in each listing's review sample. We have not installed and lived with these doors ourselves. Prices and ratings were re-checked on 8 October 2026 and at least one had changed since our previous check.