Product Review · Robot Litter Boxes · #3 Ranked
Neakasa M1 Open-Top
Open-top / large-cat friendly, app-connected · Reviewed by Drew · amazon.com live, Sept 28 2026
Why it scored a 82
The only major open-top robot litter box, which makes it the option for large, senior or globe-averse cats, with per-cat weight tracking, a roughly 14-day waste bin and a free app with no subscription, which is why Features leads at 86. Complaints are the tall 13.9-inch step-in (a step is sold separately), urine leaks at mat seams, false bin-full alerts, and the fact that the open top does not keep out dogs or kids. At $394.78 list (typically $380–430 street), Warranty is the softest at 66 on a 2-year term.
What you're getting
- Open-top design; 23.26 x 20.67 in footprint, 20.2 in tall; entry height 13.86 in
- 22.8 lb (10.35 kg); supports cats 2.2-33 lb
- 11.23 L waste bin, about 14 days for one cat; 7.17 L litter capacity
- Pull & Wrap bagged waste; anti-tracking mat and 30 waste bags included
- 6 sets of infrared sensors plus 4 weight sensors; per-cat weight ID and usage tracking
- Noise 50 dB or under; 2.4 GHz Wi-Fi app control (iOS/Android), no subscription
- Clumping litter only, particles 3 mm diameter / 10 mm length or smaller
- Open top does not keep out dogs or kids; step sold separately; 2-year warranty
ViperScore breakdown
At a glance
- Open-top design; 23.3 x 20.7 x 20.2 in; entry height 13.9 in
- 11.23 L waste bin, about 14 days for one cat; bagged waste
- 4 weight sensors; per-cat weight ID; noise 50 dB or under
- Price$394.78
- TierOpen-top / large-cat friendly, app-connected
- Category rank#3 of 7
Should you buy the Neakasa M1 Open-Top?
The Neakasa M1 Open-Top is the self-cleaning box for a cat that will not use a hooded box, or for a big cat that does not fit in one. There is no dome: the cat steps in over a 13.86-inch entry and the box sifts afterward. It supports cats from 2.2 to 33 pounds, bags the waste for you, and comes with a 2-year warranty, the longest standard coverage in this group. If you have dogs or toddlers, the open design is a real drawback and an enclosed box is safer.
Where it earns its score
- Widest weight range here. Cats from 2.2 to 33 pounds, so a Maine Coon and a kitten can share it.
- Pull and Wrap waste. Waste drops into a bag you pull closed, and 30 bags plus an anti-tracking mat are in the box.
- Two-week bin. The 11.23 L waste bin lasts about 14 days for one cat, with per-cat weight ID in the app.
- 2-year warranty. Twice the standard coverage of the Litter-Robot 4 and PETKIT boxes.
What to know first
- Open means open. Nothing keeps a dog or a small child out of the litter, and there is no lid to trap odor.
- Fussy about litter. Clumping only, with particles 3 mm in diameter and 10 mm long or smaller. Check your brand.
- Louder than the enclosed boxes. Rated 50 dB or under, versus about 35 dB for the Purobot Max 3.
- Warranty is the weakest ViperScore factor. Even at 2 years it scores 66, still the lowest number on the card. The step is sold separately.
Our verdict
The Neakasa M1 Open-Top scores 82, a Good Buy, ranked #3 of 7 robot litter boxes, matching the Litter-Robot 4 and Purobot Max 3 on score. Buy it for a big cat or a cat that hates hoods. In a home with dogs or toddlers, or if you want the quietest cycle, the PETKIT Purobot Max 3 at $369.99 is the better fit.
Litter-Robot 4
Questions buyers ask
What litter does the Neakasa M1 use?
Clumping litter only, with particles no larger than 3 mm in diameter and 10 mm in length. Crystal and pellet litters do not work.
Does the Neakasa M1 need a subscription?
No. The app works over 2.4 GHz Wi-Fi on iOS and Android with no fee.
What size cat fits the Neakasa M1?
It supports cats from 2.2 to 33 pounds, one of the widest ranges in the category, with a 13.86-inch entry height.
Ready to check it out?
Neakasa M1 Open-Top · ViperScore 82 · Good Buy · $394.78
How the other 6 robot litter boxes scored
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