The Best Open-Top Self-Cleaning Litter Boxes of 2026

Some cats won’t use a hooded box, and some owners don’t like the idea of a globe or drum turning around their cat. An open-top self-cleaning box solves both: there’s no hood to squeeze under and no door that can close. The trade-off is mess. Without walls, more litter ends up on your floor.

We haven’t tested these boxes ourselves. This guide draws on maker specs, Amazon listing text and independent testing by WIRED and Tom’s Guide, and we name the outlet whenever a test result appears. Prices are typical street prices from dated sources, so check today’s price.

The shortlist

Why choose an open design

The clearest safety rule in this category comes from WIRED: “We don’t recommend devices that close completely because of the potential that the machine could not sense the cat and kill it.” An open-top box can’t close on a cat, because there’s nothing to close. WIRED’s not-recommended list includes boxes such as the Petlibro Luma and PetSnowy Snow+, which close during cleaning.

Open tops also help big cats. There’s no entry size to worry about, and Neakasa says the M1 has almost no hard weight limit. And some cats simply prefer them. The MSD Veterinary Manual notes that some cats prefer hooded boxes and suggests offering more than one type, so a cat that ignores a hooded robot may take to an open one, and vice versa. Tom’s Guide’s cats used the M1 51 times in one week, more than any of the three hooded boxes in that test.

Neakasa M1: Best open-top

The Neakasa M1 is an open bowl that rotates to sift clumps into an 11.23 L bin, which Neakasa rates for up to 14 days with one cat. Neakasa recommends it for cats from 2.2 to 33 lb. Below 2.2 lb, its Kitten Mode turns automatic cleaning off, so the box won’t clean itself. The base M1 uses five pairs of infrared sensors and four weight sensors, and Neakasa lists it at about 50 dB.

Tom’s Guide liked that it flips the container to dislodge stuck clumps and that it comes with a netted mat. WIRED’s testing found weak points: wet litter stuck to the back grate, and it could smell waste after about five days.

M1 vs M1 Plus vs M1 Lite

Neakasa sells three versions, and they matter:

• M1 (about $360–380): five infrared pairs plus four weight sensors, 11.23 L bin. The base Amazon listing is not the M1 Plus.
• M1 Plus (about $430–450): six infrared pairs, an upgraded odor-sealing brush strip and an improved app. This is WIRED’s best open-top pick, which WIRED credits with kitten mode, an 11 L bin, 7 L of litter and up to 14 days for one cat.
• M1 Lite (about $332): no bottom gate and no mat.

The controversy, and how to buy safely

WIRED didn’t recommend the original M1 because of controversies over its safety, faulty sensors and counterfeit models. Neakasa itself published a notice, updated June 22, 2026, warning about fraudulent sellers and fake M1 listings. Our advice: buy the M1 Plus if your budget allows, buy from Neakasa’s own storefront rather than an unfamiliar seller, and keep your old box out until your cat uses the new one regularly.

Check the Neakasa M1 price. For a head-to-head with Whisker’s flagship, see Neakasa M1 vs Litter-Robot 4.

Lesure Open-Top: Best budget open-top

The Lesure Open-Top is WIRED’s best budget automatic box. Setup took WIRED under five minutes, and its cats took to it easily. WIRED measured a 16 × 20.5 in opening, and the Amazon listing describes six infrared safety sensors plus an anti-pinch sensor. The app offers scheduling, a child lock and an adjustable delay. It works with any litter by swapping the sifter panel, and two sifters come in the box.

The low sides are the downside: WIRED vacuumed every day. The app is poorly translated. The listing says 18 lb in its headline and 15 lb in its FAQ, so we’d treat 15 lb as the limit, and the listing says it’s not for kittens under 6 months. At about $250, it’s the cheapest open-top here. Check the Lesure price.

Non-enclosing alternatives: PetSafe ScoopFree rake boxes

If what you want is a box that never encloses your cat, an open-top bowl isn’t the only option. PetSafe’s ScoopFree crystal boxes don’t rotate at all. A rake sweeps waste across a disposable tray of crystal litter into a covered trough.

ScoopFree Crystal Smart

The Crystal Smart starts its rake about 20 minutes after each visit, and its sensors keep the rake still while a cat is present. The app tracks visits and reminds you to change the tray. There’s a hooded front-entry version and an uncovered version; the uncovered one has low tray walls. About $186–300. Check the Crystal Smart price.

ScoopFree Crystal Classic

The Crystal Classic is the same idea without the app, for about $100–140. PetSafe’s safety sensors let the rake run only when the cat is out of the box. It’s designed for cats up to 15 lb. Check the ScoopFree Classic price.

The catch for both is the trays. They work only with PetSafe’s disposable crystal trays, about $24.50 each, roughly one per cat per month. Some cats also dislike crystal litter. Keep either unplugged until a kitten is 6 months old, per PetSafe. Not every rake box is equally careful: WIRED warns that the Pet Zone Smart Scoop’s rake doesn’t stop if something jumps in.

Also: PetSafe OpenSky

PetSafe also sells an open-top box, the ScoopFree OpenSky, listed at $549.99 for cats up to 33 lb with an 8.5 L bin. We haven’t added it to our lineup, so we can’t rank it yet.

Scatter, tracking and mats

Open tops trade safety and space for mess. Tom’s Guide found the M1’s open design scatters litter, and WIRED vacuumed daily around the Lesure. At the other extreme, Tom’s Guide found the small-opening Leo’s Loo Too best at containing scatter, but that’s a hooded box.

Two things help:

• A big mat. For open tops we’d go to an extra-large mat such as the Gorilla Grip 40 × 28 in. The M1 comes with a netted mat; the M1 Lite doesn’t.
• Consider litter type. PetSafe claims its low-dust crystals track less than clay. For clumping boxes, see best litter for self-cleaning litter boxes.

More mats and supplies are on the accessories page.

Who should skip an open-top

• Cats that prefer cover. The MSD Veterinary Manual notes some cats prefer hooded boxes. If yours always picks a covered spot, look at the Litter-Robot 4 or PuraMax 2, both among WIRED’s picks that stay open while cycling.
• Odor-sensitive homes. WIRED could smell the M1’s waste after about five days, while it found the hooded Litter-Robot EVO virtually odor-free.
• Hard kickers with no room for a big mat. Tom’s Guide found the hooded Leo’s Loo Too best at containing scatter, though WIRED’s 12-lb cat found it cramped.

Open doesn’t mean sensor-free

An open-top box still moves while it cleans, so its sensors still matter. Check your cat’s weight and age against the maker’s minimum before switching automatic mode on: 2.2 lb for the M1 (use Kitten Mode below that), 3.3 lb and 6 months for the Lesure, and 6 months for ScoopFree crystal boxes. The safety checker runs the numbers for your cat. Our safety guide covers the rest.

How to pick

• Big cat, or a cat that refuses hoods: Neakasa M1, preferably the M1 Plus. See best self-cleaning litter box for large cats.
• Small or medium cat, under $300: Lesure Open-Top, with a big mat.
• One cat that likes crystal litter, and you never want a moving bowl: ScoopFree Crystal Smart or Classic.
• An older cat with stiff joints: an open top avoids the hood, but step-up height still matters. See the best self-cleaning litter box for senior cats.

Filter open designs in the litter box matcher, or compare every model in the comparison chart.