About Whisker
Whisker (originally Automated Pet Care Products, Inc.) was founded in 2000 by inventor and cat owner Brad Baxter, who sold the first Litter-Robot at a trade show that year. The company is headquartered in Auburn Hills, Michigan, with a second facility in Juneau, Wisconsin, and has designed and assembled its robots in the United States for 25 years. Whisker has grown to more than 600 employees and reports over 2 million robots sold. Its current lineup centers on the Litter-Robot self-cleaning litter box family -- including the flagship Litter-Robot 5 Pro, the Litter-Robot 5, and the compact Litter-Robot EVO -- alongside the Feeder-Robot automatic feeder and a line of litter, ramps, and odor-control accessories.
The Litter-Robot 4 has been named a Wirecutter Top Pick for best automatic litter box and was independently tested for months by Cats.com, which highlighted its reliability as a benchmark for the self-cleaning category. Every Whisker robot ships with the WhiskerCare warranty, a comprehensive plan covering free repair or replacement for a year, and the brand has built a community of more than 100,000 verified customer reviews on whisker.com. Whisker has also expanded into mainstream retail through PetSmart and Best Buy, and in 2026 became the first cat brand to partner with Detroit's Lions, Tigers, and Red Wings sports franchises.
Brand website: whisker.com
What Whisker makes
Whisker's range runs wider than the products we review. The lines we know best from our own testing are marked with a star:
Litter-Robot 4
flagship rotating-globe self-cleaning litter box with app-based weight tracking — featured on House of Mittens
Litter-Robot EVO
compact rotating-globe robot sized for apartments and small spaces — featured on House of Mittens
Litter-Robot 5 Pro / Litter-Robot 5
newest flagship line with dual AI cameras and per-cat facial recognition
Feeder-Robot
app-connected automatic feeder with scheduled portions
Robot accessories
ramps, carbon filters, OdorTrap packs, and the LitterHopper auto-refill hopper
WhiskerCare warranty plans
extended coverage on top of the included one-year repair/replacement warranty
Why we recognized Whisker
The House of Mittens Top Brand recognition isn't paid for and can't be applied for. We award it to the brands whose products consistently stand out in our vet-reviewed category guides. Whisker earned it on the strength of the products below, evaluated the same way every product on this site is: assessed against feline-health criteria, used with real cats, and judged on merit.
Whisker products we rated highly
Litter-Robot 4 by Whisker
The most reliable self-cleaning mechanism we've seen tested over time -- a slow, sifting globe rotation that separates clumps from clean litter quietly and consistently. Genuine multi-cat intelligence lets the Whisker app track each cat by weight and log every visit, real clinical value for catching early signs of feline lower urinary tract disease, diabetes, or kidney decline. A redundant safety system combines a weight plate with infrared laser sensors that halt and reverse the globe if a cat re-enters mid-cycle, and it accepts any standard clumping litter rather than a proprietary cartridge.
Read the 7 Best Automatic & Self-Cleaning Litter Boxes of 2026 guide →
Litter-Robot EVO by Whisker
Whisker's most compact robot -- it takes up about the same floor footprint as a traditional open litter box, so it slips into an apartment, a bathroom, or a tight corner where the full-size globe won't fit. It carries the same award-winning sifting mechanism and carbon-filter odor control as the larger Litter-Robots, plus full Whisker-app support with weight-based cat identification and a three-pound activation minimum approved for use on any surface, including carpet.
Read the 7 Best Automatic & Self-Cleaning Litter Boxes of 2026 guide →What earned Whisker the recognition
- The Litter-Robot 4 is one of the products we rated highest in our automatic litter box reviews, praised for the most reliable sifting mechanism our reviewing veterinarian has tested and a layered weight-plate-plus-infrared-laser safety system.
- Genuine per-cat weight and visit tracking through the Whisker app gives real clinical value for catching early signs of feline lower urinary tract disease, diabetes, or kidney decline before they become emergencies.
- The Litter-Robot EVO brings the same proven sifting mechanism and carbon-filter odor control into a footprint no larger than a traditional litter box -- our pick for apartments and space-limited homes.
- Two Whisker robots are among our top picks in our automatic litter box coverage, a multi-product footprint few brands match.
- Wirecutter has named the Litter-Robot 4 a Top Pick for best automatic litter box, and every Whisker robot ships with the WhiskerCare warranty covering free repair or replacement for a year.