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Best Overall
Whisker Litter-Robot 4
Best Upgrade
Whisker LitterHopper Attachment
Runner-Up
Petkit PuraMax 2
Best for Helicopter Parents
Petkit Purobot Ultra
If you have a cat, you know how picky, perfect, and just plain weird they can be. Most of the complaints lodged against cats are people not understanding they’re not dogs; their behavior can be a bit tricker and more aloof. The next-biggest cat complaint is that litter boxes are stinky, and you don’t want another creature’s poop just hanging out in your house. Regardless, thanks to ever-evolving and growing pet tech, automatic cat litter boxes have provided a solution to the smelly litter box problem.
Rudimentary automatic litter boxes have been around since the late ’80s. These early models featured an automatic rake attachment (much like the Pet Zone Smart Scoop box, below) but had problems with reliability and loudness. It wasn’t until the 2010s that litter boxes started incorporating advanced tech like Wi-Fi and app control. In the decade since, that technology has continuously grown and improved, with most automatic litter boxes providing insight into your cats’ habits and health—truly becoming an asset in understanding your feline friends even better.
We (and our cats) tested some of the highest-rated and most technologically advanced automatic litter boxes on the market for a week or more, using standard clay clumping litter unless otherwise indicated, to see if they were really worth the money—or the hype. As with all pet products, make sure you thoroughly research which automatic litter boxes are best suited for your lifestyle and your cat. We don’t recommend automatic litter boxes that close completely (all of the ones on our list of recommendations remain open through cleaning cycles), because of the potential that the machine could not sense the cat and kill it during its automatic cycle.
Check out our related guides, like the Best Automatic Feeders, Our Favorite Fancy Cat Furniture and, Our Favorite Cat Toys, Litter Boxes, and Other Feline Supplies. More of a dog person? We’ve got you covered; see our Best Accessories and Tech Essentials for Your Dog.
Updated February 2025: We’ve added the Petkit Purobot Ultra and PetPivot Autoscooper 11 and updated links and prices throughout.
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How Do Automatic Litter Boxes Work?
Automatic litter boxes vary depending on the brand and litter box type. Generally, they have sensors, either by motion or weight, to tell when a cat has entered or exited the litter box. Usually customizable and controlled via app on your phone, or on a more rudimentary timer system, the cleaning cycle will begin a short time after the cat has used the box. With the dome-shaped litter boxes, the cleaning will happen via a cycle where the litter spins and rotates around the spherical interior; the bigger soiled clumps will be deposited into the waste basket while the clean litter passes through the grates and gets recycled back into the litter box.
The Neakasa M1, for example, rotates backward and then forward (rather than a spin cycle) to sift the clumps from the clean litter, depositing the larger clumps into the waste basket. The Pet Zone Smart Scoop is the most rudimentary on our list, simply using a rake attachment to scoop the bigger clumps into a waste receptacle in the back.
Are Automatic Litter Boxes Safe?
Pet owners should always do research and make an informed decision regarding which box is best for them and their cat. We only tested automatic litter boxes that remain open during cycling and never close completely, to ensure that if for some reason the weight sensors didn’t pick up on a cat being inside, the cat could jump out. We recommend litter boxes that never close completely for added peace of mind.
These automatic litter boxes use sensors—some only needing 1 pound of weight to detect your cat—where the cycle will automatically stop no matter where it is in the cleaning process. Many also have anti-pinch sensors. For added security, the automatic litter boxes on this list have customizable schedules, including “do not disturb” modes. If you’re a neurotic helicopter cat mom like me, you could only run the clean cycles when you choose, like when you’re in the room to observe the cycle (although if you did that, the litter box wouldn’t stay clean for as long). The Pet Zone Smart Scoop is the only box on this list without sensors to automatically stop the cleaning cycle—one of the reasons we don’t recommend this model.
Where Should I Put the Automatic Litter Box?
All of these automatic litter boxes require electricity, so they will need to be near an outlet. Since cats will generally take a little while to get comfortable with their new potty, we recommend that you keep your old litter box until they use the automatic litter box regularly.
As a general rule, for old-school litter boxes, you should have a litter box for each cat, plus one. With automatic litter boxes cleaning constantly, there is less need for multiple options, but we recommend leaving your old litter box out for an extended period to ensure the cat has acclimated to the new automatic box. When setting up the new automatic litter box, put it near the existing litter box to encourage use.
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Photograph: Molly Higgins
Best Overall
Whisker Litter-Robot 4
The Litter-Robot has been the Rolls-Royce of automatic litter boxes for the past decade or so. The oval box with a large, front-facing entrance sits on a stand with a step to better accommodate cats of all ages. The box itself has a footprint of 22 x 7 inches; it took up more height but slightly less floor space than my traditional litter box. It connects to Wi-Fi so you can track and program the box via Litter-Robot’s Whisker app (available for Android and iOs). If it senses a cat at the entrance of the bowl, it will automatically stop if in the middle of a cleaning cycle and check back in 15-second intervals until it can finish.
To clean, the litter box automatically tumbles the litter using grates and gravity to separate the clumps of dirty litter, then deposits the soiled clumps in an opening below. The step doubles as a drawer with a plastic bag inside. (It comes with 25 waste drawer liners; refills are available starting at $25, but a regular plastic grocery bag would work too.) When it’s time to empty, all you need to do is pull out the step-drawer and take out the bag. The app tells you if the litter levels are optimal or need replacing, or how full the waste basket is (it will alert you when it’s full, which took roughly a week for my two cats), and it has a log of all of the times the cats have used the box and how long they were inside. It also notifies you when the cleaning cycle has begun, has been interrupted, and is complete. The box has a built-in scale, and the sensors weigh your cat every time it enters. When you set up the app, you add your cats’ profiles, and after about a week or so, it will learn which cat is which and monitor its weight changes and how often it’s using the box.
During more than a week of testing, the Litter-Robot was not able to track which cat was which, despite a nearly 7-pound difference between them, and according to the app, one cat’s weight changed by as much as 3 pounds in a period of a day. The app is continually tracking and giving updates as to when the cats’ profiles will be complete, but I wish it had been able to track each individual sooner. I didn’t delay the cycle when I first set it up, and my curious kitties got startled by the tumbling litter and were afraid to use it regularly for the first several days. I’d recommend pausing the cleaning cycle until they are more comfortable, and even now I have a 30-minute delay on cleaning in case my more curious cat wants to stick around to see how the metaphorical sausage is made. Despite the hiccups with tracking weight, this automatic litter box is a game changer and I’m excited to keep using it.
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Photograph: Molly Higgins
Best Upgrade
Whisker LitterHopper Attachment
The new upgrade to the Litter-Robot 4 is the LitterHopper, a 13 x 11-inch receptacle that attaches to the back and acts as a reservoir for about 13 cups’ worth of clean litter. One of the biggest complaints about automatic boxes is that the front-facing hole can be a little awkward to fill. With the LitterHopper, every time the box cycles, it uses the weight sensors to ensure there’s an optimal level of litter and dispenses clean litter from the reservoir during the next cleaning cycle.
The Litter-Robot 4 and the LitterHopper work well with almost any clumping or scoopable litter. The LitterHopper is easy to install on the Litter-Robot 4; all you need to do is attach the bottom brackets and slide the hopper onto the back. The directions were clear and came with a helpful video. Once litter levels drop below the litter fill line, Litter-Robot’s Whisker app (see above) will notify you that it’s time to refill. With the Litter-Robot and especially the LitterHopper attachment, there’s very minimal labor involved and you have very little contact with the litter—all while being able to monitor your cats’ health.
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Photograph: Molly Higgins
Runner-Up
Petkit PuraMax 2
The Petkit PuraMax 2 is an automatic litter box with a 76-liter fill space and a nearly 8-inch front hole opening. Like with many other automatic boxes on this list, owners can monitor cats’ usage through an app, and the box cleans litter via rotation, using a grate system to separate the waste from the clean litter (when it’s time to refill with clean litter, the box rotates so the hole is on top for easier filling). This box has triple odor control, with a sealed waste bin; an odor eliminator attachment that sits in the waste bin; and a smart, citrusy deodorizing spray that goes off after every cleaning and randomly throughout the day to ensure the litter box stays fresh.
Not only does this litter box smell neutral, dare I say it smells … good? The litter box came already assembled along with two extra rolls of waste liner bags ($30) and two refills of the deodorizing spray. When the cat enters the box, their weight is displayed on the front, and the app logs every time it was used, for how long, when the cleaning cycle begins, ends, and when the deodorizing spray was emitted. Owners can also change settings manually via the buttons on the front.
The app is a bit overcrowded with ads for other Petkit products, and unlike our top pick, the Litter-Robot 4, the box doesn’t have sensors to tell you when the litter’s low or needs to be refilled—that has to be manually checked (you can add manual reminders via the app). When in the cleaning cycle, it automatically stopped if a cat tried to enter, but one time when the cycle was going, my cat stuck his head in and the rotation didn’t stop. He was smart enough to move his head, but that does worry me a bit. Luckily, the hole on the top remains open throughout the cleaning cycle to prevent accidental injury. One of my cats, who is nearly 20 pounds, didn’t like using it because the opening was really cramped for him, so if you have bigger cats this may be a problem. This litter box smells good and is efficient, but because of the lack of updates on when it’s time to refill (and the convenient litter refill hopper attachment on the Litter-Hopper 4), this is our second-choice pick.
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Photograph: Molly Higgins
Best for Helicopter Parents
Petkit Purobot Ultra
The Petkit Purobot Ultra Automatic Cat Litter Box (8/10 WIRED Recommends) uses a camera and AI technology to monitor your cats’ litter box usage and actually lets you see your cat’s stool to help more closely monitor their health. This automatic litter box has a large horizontal footprint with a front-facing opening rotating on an X-axis (staying open the entire time during cleaning), where dirty litter is separated via a grate system and clean litter is recycled back into the box. There’s also a camera on an arm in front of the opening, which swivels and follows your cat when it senses motion and records inside of the litter box (it also has night vision). Through the app, you can watch short clips of each time your cat (or anyone) walks near the litter box and when a cat uses it. You can also manually move the camera through the app to pan to the outside or inside of the box.
The app logs and monitors usage, including the number of times used and the average duration. The automatic litter box uses AI to identify which cat used the box, and while it doesn’t explicitly note whether a cat peed or pooped, you can review the footage yourself to determine. Although this is a good idea in theory, the videos aren’t hi-def and were always in black-and-white, which made actually observing anything with any detail very difficult. The arm’s placement is awkward and it can make for a tight space for a cat to enter the hole and makes refilling litter into the box extremely difficult. Because the space is a bit tight, I had to scoop the litter with a cup and fill it in small increments, careful not to knock the camera. This litter box always worked well and kept smells at bay, but the AI analytics fell a little flat for me and it was needlessly difficult to refill the litter.
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Photograph: Molly Higgins
Best Budget
PetPivot Autoscooper 11
This automatic litter box doesn’t have all the bells and whistles of some others on this list, but if you’re looking for a basic, cheap automatic box, I’d recommend this one. Strikingly similar in design to the Neakasa M1 Self-Cleaning Litter Box (7/10, WIRED Recommends), the PetPivot Autoscooper has an open-top design that remains fully open throughout the cleaning cycle, and has sensors to know when the cat has used the box and when or if the cat re-enters during the cleaning cycle. Like most others, it spins dirty litter from clean using grates, and the dirty litter is deposited in a drawer below the box. The litter box is the smallest and lightest I’ve tested so far, and the only assembly required was popping on the legs and inserting the drawer (and putting a waste bag liner in).
There’s no app required for use, and functions can be controlled by three buttons on the box—clean, refill litter, and power on/off. When you want to completely empty the litter out, you attach a plastic cover that pops on to scoot all of the litter into the drawer below. Since this has no app, you won’t be able to closely monitor your cats’ usage or get alerted when the drawer is full, so this requires more more check-ins than other automatic boxes, but it was easy to set up, worked well without issue, and is quite literally a fraction of the cost of comparable automatic boxes on this list.
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Photograph: Smarty Pear
Good for Smaller Cats
Casa Leo Leo’s Loo Too Automatic Litter Box
Leo’s Loo Too (8/10, WIRED Recommends) is cheaper than the Litter-Robot and has the same powerful odor control. This approximately 22 x 24 x 27-inch automatic litter box is loaded with safety features to stop cleaning cycles should a cat jump in, but this one is more sensitive if you have particularly curious cats. There are four weight sensors inside the barrel to detect when a cat is still inside—it needs just 1 pound of weight to detect your cat—and there’s also an anti-pinch sensor (for fingers and paws). If that’s not enough, there’s a radar system that detects when anyone, feline or human, is near it. If the machine is in the middle of its cleaning cycle, it will immediately stop. Like the majority of automatic litter boxes, the Loo Too has an internal barrel that slowly spins around once the cat has exited, separating clumps from the rest of the litter and depositing them into an odor-proof drawer equipped with a liner. This one also uses ultraviolet light for cleaning.
The Smarty Pear app (available on iOS and Android) alerts you when the drawer is full, which is roughly once a week. The app has a daily rundown of the times your cat used it and the cat’s weight, so for multi-cat households, you’ll be able to distinguish which one is which (unless they’re the exact same size). In the app, you can set it to automatically clean six seconds to 20 minutes after your cat uses it. You can start a cleaning session manually from the app or use your voice if you connect the box to Alexa or Google Assistant. At 30 decibels, the Loo Too is nearly silent, but if you’re sensitive to noise, there’s a night mode so it doesn’t rotate during bedtime.
Former WIRED reviewer Medea Giordano’s biggest struggle using the Loo Too was pouring new litter into it, which can be tricky due to the relatively small entry hole. The barrel is also pretty cramped. Medea’s cat Huxley weighs 12 pounds, and his movements were a bit limited when he was in it. It’s not too high off the ground, so most cats should be able to get into it, but having a stair would be useful for accessibility (especially for older cats).
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Photograph: Neakasa
A More Traditional Automatic Litter Box
Neakasa M1 Self-Cleaning Litter Box
The Neakasa M1 Self-Cleaning Litter Box (7/10, WIRED Recommends) is a good automatic option for cats who prefer using a more traditional litter box with an open-top design. In this 20 x 23 x 21-inch container, they won’t feel cramped or trapped, and the headroom also allows large cats to dig, scratch, and turn around comfortably. Should there ever be a malfunction where it starts to move while the cat is still going, they can easily and quickly jump out. (Though we hope this never happens.)
Instead of spinning to the side like the other two automatic boxes, this one rotates backward and then forward. It has sensors in case a fast cat tries to get their paws in there. Cleaning cycles aren’t loud, but they are slightly louder than others on this list. If you need to put it in your bedroom, utilize the do-not-disturb function for sleeping hours. The waste is collected in a bag inside the drawer below. The bag has a drawstring design to further squelch the stench, but that poses problems when many of cats’ health issues can be identified through their stool/urine.
Neakasa’s app is easy to use, but it needs work. You set up profiles for each cat with their weight, so it can automatically add their names to the records. Former WIRED reviewer Medea Giordano thought one of the biggest faults of the M1 was that it knew who went and other times it didn’t, even when it was the same cat as the last time. When that happened, it reverted the weight to kilograms instead of her selected pounds. The weight changes slightly often, too, even when the box is correctly calibrated. Some of the settings come with slightly confusing descriptions, as it’s occasionally poorly translated into English. Overall, the M1 is a solid box that, with some app updates, should only continue to improve.
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Photograph: Simon Hill
A Good Smelling Option
Petsafe ScoopFree SmartSpin Self-Cleaning Litter Box
Let’s face it—no one enjoys scooping poop and clumps of urine out of the litter box. It’s the main downside of living with cats. I’ve had my eye on a self-cleaning number like this for a while now, but the high-end models are expensive. The PetSafe ScoopFree SmartSpin Self-Cleaning Litter Box is around half the price and has a similar design to more expensive models. This 21 x 19 x 26-inch futuristic-looking pod on legs has a rubbery bottom for litter, a weight detector that sets off the cleaning cycle a few minutes after your cat has done its business, and a slide-out tray in the bottom. After they’ve been, the body rotates, and a mesh catches the clumps and deposits them in the tray, where there’s a bag with a wee deodorizer unit that smells like watermelon. You can connect it to Wi-Fi and review your cat’s toilet visits in the app on your phone, where each entry displays the time they went, their weight, and toilet trip duration.
This self-cleaning litter box was easy to build and works surprisingly well, even though it feels kinda cheap. We use Greenwoods Plant Fibre Natural Clumping Litter (available only in the UK, but similar litter is sold in the US), and the box is good at filtering out the lumps. Whether your cat likes it is another matter. Our youngest cat, Rocket, is fearless and has been using it quite happily, but Luna saw it in motion and won’t go near it now. It is fairly quiet, and I couldn’t hear it a room over. Even with the elevated lip, you will likely want a mat in front of it to catch stray litter. Remember that you still have to clean it (how often depends on your cat), and you’d better remember to check the drawer periodically to empty it.
The bags are an awkward proprietary size that is annoying to fit, since PetSafe wants to hit you up for refills at $15 for 25 liners. Ultimately, as a relatively affordable self-cleaning litter box, the PetSafe ScoopFree SmartSpin is worth a look. —Simon Hill
Photograph: Molly Higgins
Not Recommended
PetSnowy Snow+ Self-Cleaning Litter Box for $680: This box looks like something from Kubrick’s visions of space travel, or if Eames started making plastic litter boxes. It takes up quite a bit of horizontal floor space, so it may not be ideal for those in cramped apartments looking to conserve space. The globe is inside the box, hidden from view, and the cat has to climb up, go under a curtain, and enter the globe from the right side while inside. Unlike all others on this list, this globe is closed during cleaning, which could cause injury if the machine malfunctioned and didn’t sense a cat. The box also doesn’t tell you when the litter’s low or needs to be refilled. My cats had a really hard time using it—they just couldn’t understand that it was a litter box. Older cats could have a tough time jumping into it and the smaller opening could be a problem if you have bigger cats. It might be great for someone who wants to keep things tidy—it’s extremely clean, smells good, and hugely reduces litter tracking. However, we just can’t recommend the box since the opening closes during cleaning, which is not safe (see intro).
The Pet Zone Smart Scoop for $166: This is probably the least “smart” automatic litter box we’ve tested—it’s a typical rectangular plastic box with an automatic arm that acts as a rake and scoops the clumped (soiled) litter into a small bin on the other side. Once the cat leaves, it begins a 15-minute countdown and the rake slides over the length of the box, (ideally) scooping up the waste and lifting it into the receptacle. You’re only allowed to fill the litter box with about an inch and a half of litter, which my cats didn’t like (they prefer a few inches to really bury it). The rake doesn’t stop when it’s in the cleaning cycle—even if something jumps in. Luckily my cats were never brave enough to try this, but when I stuck my hand in there during cleaning, the rake continued on without stopping, which is potentially dangerous. My cats tend to pee on the side of the litter box, which, because of the rake’s placement, means it misses an inch on either side—I still had to scrape the caked-on litter from the edges. It starts the cycle so soon after it detects use (and the cycle timing can’t be adjusted) that the litter didn’t have time to clump completely; the rake would immediately break it down into smaller clumps that would then be missed because they were too small. This box is the least expensive option on the list, and would work if you’re someone who really hates cleaning the litter box but doesn’t want to spend big bucks. For me, it’s not worth it, and I’d rather just scoop it myself.