iRobot Roomba Max 775 Combo
For homes with mixed floors that want a roller mop with a hot-wash, heat-dry dock from iRobot; the Plus 678 has similar features for less.
Amazon $799.99$799.99
The iRobot Roomba Max 775 Combo and the iRobot Roomba Plus 678 Combo are evenly matched, rated 4.0 and 3.9. The iRobot Roomba Max 775 Combo costs $100 less ($799.99 vs $899.99).
iRobot Roomba Plus 678 Combo
A strong pick for hard-floor homes that want hot-water roller mopping and a full-service dock for less than iRobot’s flagship 875.
Amazon $899.99$899.99
Prices were last checked October 26, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every self-cleaning dock robot vacuum; a clear win is highlighted. How we rank explains each one.
| Factor weight | iRobot Roomba Max 775 Combo | iRobot Roomba Plus 678 Combo |
|---|---|---|
| Overall rating | 4.0/5 | 3.9/5 |
| Cleaning 30% | 48 not yet tested; estimated from 3 tested iRobot robots and the median of the 70 tested robots | 48 not yet tested; estimated from 3 tested iRobot robots and the median of the 70 tested robots |
| Value 25% | 50 $800 | 42 $900 |
| Dock 20% | 100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent | 100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent |
| Navigation 15% | 100 LiDAR + camera | 100 LiDAR + camera |
| Mopping 10% | 85 Roller, extends to edges | 90 Roller, lifts 10 mm, extends to edges |
Specifications
| iRobot Roomba Max 775 Combo | iRobot Roomba Plus 678 Combo | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 30,000 Pa | 30,000 Pa |
| Main brush | dual rubber brushes | hair-cutting multi-surface bristle brush |
| Extending side brush | Yes | - |
| Mopping | ||
| Mop | Roller, extends to edges | Roller, lifts 10 mm, extends to edges |
| Mop lift | - | 10 mm |
| Leaves mop at dock | No | No |
| Extending mop | Yes | Yes |
| Dock | ||
| Dock | Washes mop + empties | Washes mop + empties |
| Self-empties | Yes | Yes |
| Washes mop | Yes | Yes |
| Hot-water wash | Yes | Yes |
| Hot-air drying | Yes | Yes |
| Detergent dosing | Yes | Yes |
| Navigation & app | ||
| Navigation | LiDAR + camera | LiDAR + camera |
| Obstacle avoidance | PrecisionVision AI camera object recognition | PrecisionVision AI camera object recognition; SprayForce AI pre-treats detected stains |
| Climbs thresholds | - | 35 mm |
| Build | ||
| Height | 4.1 in (104 mm) | 3.9 in (99 mm) |
| Battery | 6,000 mAh | 6,000 mAh |
| Weight | 12.8 lb (5.8 kg) | 10.7 lb (4.8 kg) |
| Warranty | 1 year | - |
| Released | 2026-07 | 2026-09 |