Narwal Freo Pro

The dock washes and air-dries the mop and cleans its base, but it does not auto-empty dust, so you empty the bin by hand.

The robot is 4.2 inches tall, so it fits under taller furniture but may not clear very low sofas or cabinets.

It clears obstacles up to 20 mm, so it handles standard door sills but may stop at taller thresholds.

It washes the mop with hot water rather than auto-dispensing detergent, so you add cleaning solution yourself if you want it.