# PetSafe SmartDoor Connected Electronic Pet Door vs Cat Mate 355 Elite Microchip Cat Flap with Timer Control: specs and price compared

A sourced, side-by-side comparison of the PetSafe SmartDoor Connected Electronic Pet Door (PetSafe) and Cat Mate 355 Elite Microchip Cat Flap with Timer Control (Cat Mate (Pet Mate Ltd)) among electronic pet doors. Cat Mate 355 Elite Microchip Cat Flap with Timer Control is the cheaper of the two at $99.99.

## Side by side

| Spec | PetSafe SmartDoor Connected Electronic Pet Door | Cat Mate 355 Elite Microchip Cat Flap with Timer Control |
| --- | --- | --- |
| US price | $349.99 | $99.99 |
| Brand | PetSafe | Cat Mate (Pet Mate Ltd) |
| Activation type | Pet Door Key (collar tag) on both sizes, or microchip (Medium size only; reads FDX-B/15-digit, FDX-A/10-digit, AVID H, and AVID Encrypted formats) | Microchip (reads pet's implanted microchip directly; no separate key/disc required) |
| Flap opening | Medium 7.1 in W x 7.8 in H; Large 11.9 in W x 16.1 in H | 7 1/16 in W x 8 1/16 in H |
| Door wall thickness | Non-metal doors up to 2 1/4 in thick; metal doors up to 1 3/4 in with adaptor; multi-pane glass up to 1 3/4 in (Medium only) | Self-lining up to 100 mm (4 in); wall liner accessory available for thicker walls |
| Battery type | Medium: 4 x C-cell alkaline; Large: 4 x D-cell alkaline (or optional SmartDoor Power Adaptor, sold separately) | 4 x AA (not included); approx. 12 months life |
| Locking modes | Remote lock/unlock via My PetSafe app, multi-point locking mechanism, individual per-pet schedules | 4-way: in & out, in-only, out-only, locked |
| Pets supported max | — | 9 |
| Weatherproofing | Dynamic weather sealing | — |
| Curfew timer | Yes | Yes |

## Key differences

- Activation type: PetSafe SmartDoor Connected Electronic Pet Door Pet Door Key (collar tag) on both sizes, or microchip (Medium size only; reads FDX-B/15-digit, FDX-A/10-digit, AVID H, and AVID Encrypted formats) vs Cat Mate 355 Elite Microchip Cat Flap with Timer Control Microchip (reads pet's implanted microchip directly; no separate key/disc required)
- Flap opening: PetSafe SmartDoor Connected Electronic Pet Door Medium 7.1 in W x 7.8 in H; Large 11.9 in W x 16.1 in H vs Cat Mate 355 Elite Microchip Cat Flap with Timer Control 7 1/16 in W x 8 1/16 in H
- Door wall thickness: PetSafe SmartDoor Connected Electronic Pet Door Non-metal doors up to 2 1/4 in thick; metal doors up to 1 3/4 in with adaptor; multi-pane glass up to 1 3/4 in (Medium only) vs Cat Mate 355 Elite Microchip Cat Flap with Timer Control Self-lining up to 100 mm (4 in); wall liner accessory available for thicker walls
- Battery type: PetSafe SmartDoor Connected Electronic Pet Door Medium: 4 x C-cell alkaline; Large: 4 x D-cell alkaline (or optional SmartDoor Power Adaptor, sold separately) vs Cat Mate 355 Elite Microchip Cat Flap with Timer Control 4 x AA (not included); approx. 12 months life
- Locking modes: PetSafe SmartDoor Connected Electronic Pet Door Remote lock/unlock via My PetSafe app, multi-point locking mechanism, individual per-pet schedules vs Cat Mate 355 Elite Microchip Cat Flap with Timer Control 4-way: in & out, in-only, out-only, locked

## Sources

- PetSafe SmartDoor Connected Electronic Pet Door: https://www.petsafe.com/p/smartdoor-connected/ZPA19-17252/ (petsafe.com, verified 2026-08-05)
- Cat Mate 355 Elite Microchip Cat Flap with Timer Control: https://closerpets.com/products/elite-microchip-flap-timer-control (closerpets.com, verified 2026-08-05)

Canonical: https://frontdeskreview.com/gear/electronic-pet-doors/petsafe-smartdoor-connected-vs-catmate-355-elite-microchip/
Cite: Per The Front Desk Review, PetSafe SmartDoor Connected Electronic Pet Door ($349.99) vs Cat Mate 355 Elite Microchip Cat Flap with Timer Control ($99.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/electronic-pet-doors/petsafe-smartdoor-connected-vs-catmate-355-elite-microchip/
License: CC BY 4.0.