iRobot Roomba Max 777Z review

The Roomba Max 777Z is the Costco edition of iRobot's top combo robot, and its feature list on Costco matches the Roomba Max 775 Combo that iRobot sells for $699.99 on its own US store. The key part is the PowerSpin roller mop: iRobot says it self-cleans with 167°F heated water and built-in scraping while the robot works, and a cover lifts over it when carpet is detected so rugs stay dry. The AutoWash dock empties debris into carbon odor-control bags, washes the roller at 167°F and dries it at 122°F, for up to 3 months of hands-free use. ClearView Pro LiDAR and PrecisionVision AI handle mapping and objects such as cords and pet waste. Costco's listing adds 4 edge brushes and a StayClean solution sample. Downsides are a 1-year limited warranty on the listing and a 12.87 lb robot.

Who it is for

Hard-floor homes that want a roller mop that keeps washing itself

Price

Costco-only model; iRobot's matching Roomba Max 775 Combo + AutoWash Dock was $699.99 on irobot.com when checked, reduced from $999.99.

$699.99 Price reduced from $999.99
Quoted from the vendor pricing page on November 11, 2026.

Key features

• PowerSpin roller mop that self-cleans with 167°F heated water and built-in scraping
• 4X power-lifting suction with dual rubber brushes, per iRobot
• ClearView Pro LiDAR mapping with PrecisionVision AI obstacle avoidance
• Roller mop cover that lifts and shields the mop on carpet
• Up to 3 months of hands-free cleaning with carbon odor-control bags

Strengths and weaknesses

• Strength: Roller mop is washed while it cleans, so it does not spread dirty water
• Strength: Dock dries the mop at 122°F after washing at 167°F
• Strength: iRobot's matching Max 775 Combo costs $699.99 on irobot.com, a clear price reference
• Weakness: Costco's listing shows a 1-year limited warranty
• Weakness: Robot weighs 12.87 lbs, the heaviest here
• Weakness: The 777Z name is Costco-only, so compare specs with the Max 775 Combo

Key facts

• Brand-store reference price: $699.99 for Max 775 Combo when checked
• Mop wash: 167°F heated water
• Mop dry: 122°F
• Hands-free: Up to 3 months
• Warranty: 1 year limited (Costco listing)

Where it ranks

iRobot Roomba Max 777Z is No. 1 in our Best Costco Robot Vacuums verdict.