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A straightforward way to give one or more microchipped cats their own entry while locking out everything else that isn't registered.
A locking interior pet door for controlling one cat's access to a specific room, sized for cats up to 15 pounds and doors up to 2 inches thick.
A manual four-way locking cat flap from PetSafe's Staywell Classic line, simple to operate but without pet identification to keep other animals out.
A no-flap interior cat door with a strong rating and high review count, a straightforward option if you want to skip flap training entirely.
A microchip-reading cat flap for keeping unregistered animals out while admitting up to 30 chipped pets, provided the mounting surface fits its 85mm compatible thickness.
A serviceable basic flap for a household cat, though anyone needing selective access control should look at a microchip model instead.
A straightforward flap door with a lockable four way setting, useful for a first cat door on a standard interior or exterior door.
A locking flap door sized for small cats and standard door thicknesses, useful anywhere four way control over access matters.
A magnetic, selective-entry cat flap with 4-way locking, useful specifically for keeping unwanted animals out while controlling a cat's own direction of travel.
A dependable microchip cat door for keeping other animals out, provided you're set up to program it and don't mind AA batteries over a wired connection.
A well-specified extra-large pet door for bigger dogs, with a telescoping frame that covers a decent range of wall thicknesses and a lockable slide for when the door needs to be sealed shut.
A magnetic, four-way locking flap door sized for cats and small dogs, with the caveat that the listed door-thickness compatibility should be double-checked before buying.
A basic magnetic-key cat door with four lock settings and a three-year warranty, suited to stray control rather than distinguishing between multiple cats.
A straightforward soft flap cat door with an adjustable telescoping frame, suited to standard door thicknesses and cats up to 35 pounds.
A microchip-reading cat door with hub connectivity for households wanting to restrict entry to their own cat and check activity remotely, provided the wall or door is within the 25 centimeter thickness limit.
A straightforward interior cat door for keeping dogs out of a cat's space, worth it if the door falls within the 1.5 inch thickness limit.
A magnetic, lockable cat flap that works well if your door thickness matches its 2.17 inch spec, with less certainty of fit for doors outside that measurement.
A practical option where the door thickness matches, since the four way lock gives more control than a simple flap that only swings freely.
An aluminum flap door rated to 100 pounds with 2-way locking, built for thicker walls or doors and better suited to larger pets than to cats alone.
A large aluminum and plastic flap door rated to 220 pounds, built for big dogs despite its cat door listing. Choose it for a permanent large-breed opening, not a cat-specific install.
A magnetic, auto closing pet door built into a full screen door replacement panel, sized for cats and small dogs, with a lock for sealing it shut.
A lockable, flap-free interior pet door sized for cats up to 20 pounds, best suited to controlling room access rather than exterior use.
A dependable disc based access flap for households wanting selective entry without microchip electronics, provided the door opening and wall thickness match the spec.
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PetSafe, Cat Mate, Ideal Pet Products, Purrfect Portal, Hakuna Pets lead this category among the 14 brands that passed our curation checks.
A listing appears only when it has a recorded price, a minimum customer rating, and enough ratings or monthly sales. Generic and unbranded listings are left out, while every real brand stays, including brands sold only on Amazon. The ones that pass are ordered by how many people search for that brand and model each month; review counts only break ties.
Cat doors come as open interior passages, manually controlled flaps and electronic models that identify a microchip or collar key. An open passage suits unrestricted indoor access; controlled models let you restrict travel, with identification features varying by model. Start with the mounting location: an interior door, exterior door, wall or glass panel needs a cat door designed for that surface.
Measure the thickness where the tunnel will pass through, including any surface layers. Among the 23 products that list maximum compatible thickness, most fall between 1.5 and 3.4 inches, and 2 inches is typical. Compare your measurement with both the minimum and maximum thickness permitted in the manual; a surface can be too thin as well as too thick for the frame to attach correctly. Wall installations may need tunnel extensions, so establish whether suitable extensions are supplied or sold separately. For glass, consult a glazier before buying, since installation may require a replacement pane prepared for the opening. Compare the required cutout and external frame dimensions with the available panel area. For a replacement, measure the existing hole to determine whether the new frame can cover it and fasten securely.
Match the clear opening to your cat’s body width and height, leaving room to pass comfortably. Medium and Large size labels, and the dog breed size filter, cannot substitute for usable opening dimensions. Plan the opening’s height above the floor around your cat’s ability to step through, particularly if movement is difficult. For an exposed exterior doorway, look for the manufacturer’s guidance on weather protection and suitability for wind and rain. A nervous cat may need gradual training, so see whether the passage can be secured open during supervised introductions.
If filtering by material, establish which components are described as Plastic or Aluminum. Decide whether you need travel in both directions, entry with exit blocked, exit with entry blocked, or a fully locked setting. If you need different permissions for different cats, check that the model supports them in the required direction. For electronic models, verify compatibility with your cat’s implanted microchip or the required collar key, whether keys are supplied or sold separately, and which direction identification controls. The closure filter values Magnetic and Flap do not tell you which access controls are provided. For battery-powered models, check for a low-battery warning and whether depleted batteries leave the flap locked or unlocked. The manual should explain how to clean the tunnel and any sensors; also confirm whether replacement flaps or collar keys are available for the model.
How we list products: every listing here has a recorded price, a minimum customer rating and enough ratings or monthly sales. Generic and unbranded listings are left out; every real brand stays, including brands sold only on Amazon. Products are ordered by monthly searches for their brand and model on every page.Editorial policy
