Litter-Robot Alternatives: Specs and Prices Compared

Several self-cleaning litter boxes from other brands cost less than the Litter-Robot 4’s $699 list price. As of November 2, 2026, five non-Whisker models we track range from $269.99 to $549.99 list, and three of them were on sale for $379.99–$399.99 that day. They differ from the LR4 on several published specs: cat weight limit, open-top or enclosed design, litter type and waste capacity. The tables below use each maker’s own U.S. product pages.

Price and cat weight range

The LR4 is the only model here whose maker gives a number of cats. Neakasa’s M1 models have the highest stated upper weight limit. PetSafe also sells a SmartSpin bundle (liners, deodorizers and a mat) that was listed at $379.99 on the check date, below the standalone box.

Design, litter and waste capacity

None of the non-Whisker brands publishes a drawer-emptying interval for more than one cat. Expect shorter intervals with more cats, but no maker gives a figure. For how the mechanisms differ, see sifting and rotating litter boxes and open-top vs enclosed.

App, size and warranty

Each app’s features are described here as the maker states them. App weight and visit logs are records, not health checks. Talk to a veterinarian about any change you notice.

Recurring supplies

Recurring costs depend on what each box consumes:

• Neakasa: replacement waste bags cost $19.99 for 30. Neakasa also says “you can use any bag that fits in the waste drawer.”
• PETKIT: trash bags for the Purobot Max 3 and PuraMax cost $29.99 for 5 rolls of 20.
• PetSafe Crystal Smart: it runs on disposable crystal trays, at $73.49 per 3-pack, and PetSafe says each lasts up to 30 days.
• Whisker: liners cost $35 for 50 and carbon filters $30 for six. Whisker recommends replacing the filter monthly.

Litter is the variable cost the makers don’t quantify. Use the cost calculator with your own numbers.

Who each fits, by spec

These are spec-based fits only:

• Litter-Robot 4: cats of 3–25 lb, and homes that want a maker-stated cat count (up to 4). It needs a 22” x 27” footprint and is the most expensive model here. Details on the Litter-Robot 4 page.
• Neakasa M1 Plus / Lite Plus: cats up to “around 33 lbs,” the highest stated limit in this group, and owners who prefer an open top. Waste capacity is the largest listed here, at 11.23 L. The two versions share the same core specs. The Plus costs $20 more on sale and includes a litter mat. See Neakasa M1.
• PETKIT Purobot Max 3: the widest litter list (tofu and corn included) and the shortest exterior height here (21.7”). Its upper weight limit is the lowest in the group, at 22 lb, and PETKIT says it is for cats 6 months and up.
• PetSafe SmartSpin: the only model here whose maker says non-clumping litter can be used. It is rated up to 25 lb. PetSafe does not publish its dimensions.
• PetSafe Crystal Smart: the lowest list price here. It uses crystal-litter trays instead of loose litter, so the recurring cost is the trays. See cheap self-cleaning litter boxes.

For more cats or bigger cats, see multiple cats and large cats.

A note on PETKIT PuraMax 2

PETKIT’s old PuraMax 2 and PuraMax web addresses now redirect to the Purobot Max 3 page. The Max 3 carries a different model number, and PETKIT does not say it is a renamed PuraMax 2, so we treat it as a separate model.

Bottom line

The non-Whisker models above list for $269.99 to $549.99 against the LR4’s $699, as of November 2, 2026. By published specs, the Neakasa M1 models offer the highest weight limit and an open top. The PETKIT Purobot Max 3 takes the widest range of clumping litters, the SmartSpin allows non-clumping litter, and the Crystal Smart has the lowest list price but runs on crystal trays. The Litter-Robot 4 is the only one in this group with a maker-stated cat count. Compare all of them in the comparison table.