Review / Specimen 04 - Open-top bed
Neakasa M1 Plus review: the open-top that made enclosed optional
Research updated November 10, 2026 / Clean Litter Lab notes
The Neakasa M1 line is the machine that moved open-top from experiment to default recommendation, and the M1 Plus listing in the current catalog carries the formula: an open bed a cat can survey and leave from any side, a waste bin sealed by a brush strip where the bed meets the base, and the widest cat range in this catalog at 3.3 to 33 lb. At $449.99 it is priced like a premium product and specced like one.
The honest limitations are about physics, not quality: an open bed scatters more than a hooded one, and the app is competent rather than delightful.
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Next to its closest alternative
Neakasa M1 Plus specification sheet
Verified specification sheet
Neakasa M1 Plus Open-Top Automatic Litter Box
- Design
- Open-top rotating bed
- Price when checked
- $449.99 listed on Nov 10, 2026
- Footprint
- 23.2 x 19.1 x 20.2 in (L x W x H)
- Unit weight
- 22 lb
- Cat weight range
- 3.3 to 33 lb, up to 3 cats; kitten mode below 3.3 lb
- Waste capacity
- 11.2 L waste bin, about 7 to 14 days
- App and Wi-Fi
- Neakasa app on 2.4 GHz, per-cat activity tracking
- Litter type
- Clumping litters
- Safety system
- Open-top design, rotation-angle limiting gear, 6-array infrared detection
- Support and warranty
- 2-year protection plan on this bundle
Source: Amazon catalog data and the manufacturer listing for ASIN B0CSKBWBF6, checked at research time.
Where the Neakasa M1 Plus scores well
- Open-top layout follows how cats naturally prefer to toilet - visible, escapable, no door to push through
- The brush-strip seal between bed and bin tackles open-top odor at the source instead of perfuming it
- Supports cats up to 33 lb, the widest weight range among the open-top models here
- Kitten mode gives under-weight cats a supervised path instead of a hard exclusion
Honest limitations
- Open top means litter scatter is managed by the included mat, not eliminated
- App control is 2.4 GHz only
- The bed rotation still moves, so the first days need the same patient introduction as any automatic box
What owners report
Owners of large and anxious cats are the loudest fans: cats that refused enclosed globes often accept the M1 within days. Praise repeats for the odor seal, which owners describe as better than expected for an open design. Complaints center on litter kicked over the low sides by enthusiastic diggers and on app simplicity compared with the Whisker ecosystem.
Themes paraphrased from public owner reviews and owner forums at research time. No individual review is quoted and no rating average is treated as a test result.
Why the seal matters more than the shape
Open-top skeptics ask one question: does it smell? Neakasa's engineering answer is to seal the destination, not the bed. Waste drops through into an 11.2 L bin closed by a composite sealing ring, with a brush strip wiping the junction on every rotation. Owner reports line up behind the design - odor is the praise theme, scatter is the complaint theme, and that ordering tells you the seal works. A vigorous digger will still decorate the mat; the included mat is sized for it, and the tracking guide handles the rest.
Questions owners actually ask
Is the M1 Plus the same as the M1?
The Plus is the current bundle in the live catalog: the open-top machine with a 2-year protection plan, mat and 30 refill bags. A plain M1 surfaced only as a renewed listing during our check, so the Plus is the verified buy.
How does kitten mode work?
For cats under 3.3 lb, the Neakasa app offers a kitten mode with safer behavior while the cat grows into the automatic threshold. Our kitten guide explains the thresholds across brands.
Does it really take a 33 lb cat?
That is Neakasa's published ceiling, the highest here. The open bed is also the easiest geometry for a big cat to turn in - no doorway to negotiate.
What litter does it take?
Clumping litters. The bed sifts like every rotating design, so crystals and pellets are out - see the litter compatibility matrix in our guide.
How often do I empty it?
The 11.2 L bin is rated at 7 to 14 days depending on cat count. Three cats means the short end of that range.
Lab verdict
Large cats, anxious cats and any cat that has already rejected an enclosed box - the safest acceptance bet in the catalog.
Skip it if: your cat is a violent digger in a carpeted living room, or you want per-cat camera records - look at the Purobot Ultra.
Spotted something out of date? The lab corrects the record in the open - see the contact and corrections page.