10 Best Giant Litter Box 2026 in the United States

The Litter-Robot 4 Supply Bundle by Whisker is a large, self-cleaning cat litter box designed for indoor use and fits well if you want to avoid daily scooping. It measures about 27 x 24 x 30 inches, making it spacious enough for most cats, even up to four at once, and the sides are tall enough to help keep litter inside. Made from durable plastic, it’s easy to wipe down with included cleaner wipes. The automatic sifting system separates waste from clean litter, which then collects in a sealed drawer lined with disposable liners, making cleanup quick and less messy.

Odor control is a strong point here: the package includes OdorTrap packs and carbon filters that help reduce smells significantly compared to standard litter boxes. The entry is a large, open front, so your cat can easily get in and out. One neat feature is the companion app that lets you monitor the litter box’s waste level, litter amount, and even track your cat’s weight, which is helpful for multiple-cat households or pet health monitoring.

The unit weighs around 24 pounds and needs a firm, flat surface to work properly, so it might be less convenient if you have carpeted or uneven flooring. It requires cats to be at least 3 pounds to use safely in automatic mode. Although the upfront cost and size might seem high, the time saved from scooping and better odor control make it a valuable investment if you have multiple cats or want a low-maintenance solution. This product is ideal for cat owners seeking a large, smart, and mostly hands-off litter box with strong odor management.

The PetSafe ScoopFree OpenSky is a large, automatic self-cleaning litter box designed with convenience and hygiene in mind, especially for homes with multiple cats. Its size (about 20.6" long by 10" wide and 28.4" tall) provides ample space, while the open-top entry makes it easy for cats to access without feeling enclosed. The sides are moderately high, helping to reduce litter scatter but still allowing easy entry and exit.

Made from durable plastic, this unit features a hands-free cleaning system that uses a sealed waste drawer to trap odors and mess, making maintenance simpler and less frequent compared to traditional boxes. The included fresh scent deodorizers and integrated odor control system further help keep the area smelling clean. One standout convenience is the app control, which tracks cat usage and weight—helpful for monitoring your pet’s health—but this might be more advanced than some users need. The device’s self-cleaning function refreshes the litter bed after each use, keeping it consistently clean.

On the downside, at nearly 30 pounds, it’s quite heavy and sizable, which could make moving or cleaning around it a bit challenging. Also, the open-top design, while comfortable for many cats, may not suit cats that prefer privacy or are wary of open spaces. The plastic material is easy to wipe down but might show scratches over time. This litter box is a good fit for multi-cat households that value automation and odor control, and owners willing to invest in technology to ease daily chores. Those with fewer cats or cats preferring enclosed spaces might want to consider alternatives.

The PETKIT Purobot Ultra 2025 is a large, high-tech litter box designed for cats up to about 22 pounds, making it a great fit for households with bigger cats or multiple cats if they take turns. It measures 32.2" long, 24" wide, and about 21" high, offering plenty of space inside for comfortable use. The tall sides help contain litter scatter and reduce mess, while the ABS plastic material keeps it sturdy and easy to clean.

What makes this litter box stand out is its facial recognition camera and AI-powered monitoring system, which tracks each cat’s bathroom habits individually. This can be helpful if you want to keep an eye on your cat’s health through changes in stool or urine patterns. The box is self-cleaning and automatically packs waste into sealed bags, reducing your contact with odors and scooping. Its 4-stage odor control system is effective at keeping smells minimal, thanks to sealed waste bags and air purification features. Entry is always open because of the rotating cylinder design, which prevents your cat from feeling confined or trapped. The device works quietly, which helps avoid intimidating shy cats.

The box is quite heavy at 46 pounds, making it less portable or tricky to move around. It requires a flat surface for proper sensor function and shouldn’t be placed on carpets. Also, the advanced tech features require app setup and occasional maintenance of waste bags and sensors, which might be more than some prefer. This litter box is ideal if you want a spacious, mostly hands-off solution with added health tracking and excellent odor control, but it might be too complex and bulky for those wanting a simple or lightweight option.