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.

This self-cleaning litter box is a great option for households with multiple cats or those wanting a larger, more open design. Its spacious open-top entrance (16.5”×16.5”) gives cats plenty of room to enter and exit comfortably, avoiding the cramped feeling common with enclosed boxes. The box stands about 21 inches tall, which helps contain litter scatter and privacy while remaining accessible. Safety is a strong point, with seven sensors that stop the cleaning cycle if your cat approaches, reducing any risk of accidents.

The automatic system connects to an app, allowing you to schedule cleaning and get alerts, but it only works on 2.4G WiFi, so a compatible network is needed. Odor control is handled by a large 10.5-liter sealed waste bin that traps smells efficiently, meaning you don’t have to empty it every day. The leak-proof design and reusable washable liner also make cleaning less messy and more eco-friendly.

The litter box is quite heavy (around 22 pounds), which might be inconvenient if you need to move it often. Additionally, the open-top design may not suit cats who prefer more privacy. If you want a low-maintenance, spacious, and smart litter box that helps keep odor and mess under control, this PARUUNTYS model is worth considering.