Researched and edited by Sifted Paws Editorial TeamResearch-based review; no hands-on testing is claimed unless specifically stated.
Quick answer
For multiple cats, prioritize cycle availability, waste-bin capacity, identification limits, cleaning access and a backup-box plan. Among these four, Litter-Robot 4 has the most mature multi-cat monitoring ecosystem; PuraMax 2 and Neakasa add app tracking, while AS11 offers a simpler no-history approach.
One box can become a bottleneck
Even when a manufacturer states support for several cats, a single machine can be unavailable during cleaning, maintenance or a fault. Keep a backup box, especially during transition.
What matters most
- Waste-bin capacity and emptying frequency
- Cycle duration and delay
- Ability to distinguish similarly weighted cats
- Odor containment
- Ease of deep cleaning
- Support and parts availability
Best fit among the four
Litter-Robot 4 has the most mature multi-cat monitoring ecosystem. PuraMax 2 and Neakasa add app tracking. AS11 is simpler but offers no usage history.