Purobot Ultra vs Litter-Robot EVO
Cross-brand multi-cat rivals at a similar price
Petkit Purobot Ultra
Buy now$799.99
Currently listed at $799.99 on petkit.com against a regular price of $899.99.
Buy now
Whisker Litter-Robot EVO
Buy now$599
Manufacturer starting price on whisker.com ("as low as $599"); bundles cost more.
Buy now · Manufacturer US/Canada PDP live; as low as $599 with Add to cart / InStock signals (verified 2026-09-12).
Where the published data differs
Every line below is computed from the two manufacturers’ own figures. Attributes neither brand publishes are omitted.
- Litter-Robot EVO lists at $599, $200.99 below Purobot Ultra at $799.99.
- Maximum cat weight: Purobot Ultra 22 lbs versus Litter-Robot EVO 19 lbs (16% more). Published data favours Purobot Ultra.
- Warranty: Purobot Ultra 24 months versus Litter-Robot EVO 12 months (100% more). Published data favours Purobot Ultra.
- Minimum cat weight: Purobot Ultra 3.3 lbs versus Litter-Robot EVO 3 lbs (10% more). Published data favours Litter-Robot EVO.
- Proprietary waste bags required: published for Purobot Ultra, not for Litter-Robot EVO.
- Litter type required: Purobot Ultra — Clumping clay, tofu or mixed litter, particle length up to 12 mm; Litter-Robot EVO — Clumping clay litter.
- Cleaning cycle trigger: Purobot Ultra — Automatic after the cat exits, with app scheduling; Litter-Robot EVO — Weight sensors start the cycle after the cat exits.
- Odor control method: Purobot Ultra — Auto-sealed waste bags with contactless packing; Litter-Robot EVO — Sealed waste drawer with carbon filter.
Full specification comparison
| Attribute | Purobot Ultra | Litter-Robot EVO |
|---|---|---|
| Multi-cat suitable | Yes | Yes |
| Minimum cat weight | 3.3 lbs | 3 lbs |
| Maximum cat weight | 22 lbs | 19 lbs |
| Waste drawer capacity | 10 L | Not published |
| Litter type required | Clumping clay, tofu or mixed litter, particle length up to 12 mm | Clumping clay litter |
| Proprietary litter required | No | No |
| Proprietary waste bags required | Yes | No |
| Subscription required | No | No |
| Cleaning cycle trigger | Automatic after the cat exits, with app scheduling | Weight sensors start the cycle after the cat exits |
| Adjustable cycle delay | Yes | Yes |
| App control | Yes | Yes |
| Weight sensing | Yes | Yes |
| Health monitoring | Yes | Yes |
| Odor control method | Auto-sealed waste bags with contactless packing | Sealed waste drawer with carbon filter |
| Entry height | 10.43 in | Not published |
| Interior dimensions | Not published by either | Not published by either |
| Footprint | 20.94 x 32.2 x 24.09 in | 20.6 x 24.3 in |
| Operating noise | Not published by either | Not published by either |
| Power source | AC adapter, 12V/4A | 15 Volt DC / AC adapter |
| Battery backup | No | Not published |
| Warranty | 24 months | 12 months |