22% OFF
$784.80
$999.99
Updated November 2026
Data from the official iRobot site.
2026 verdict
Need a full-service combo that doses its own detergent?
The iRobot Roomba Max 775 Combo Robot + AutoWash Dock wins this iRobot pairing on suction and on automatic detergent. It is rated at 30000Pa against 7000Pa and adds an automatic detergent dispenser, and its AutoWash dock empties the bin and washes and dries the mop while the mop lifts on carpet. The iRobot Roomba 505X is the value option: it costs less, runs up to 180 minutes with a 3L dock tank, and both of them work with Alexa, Google Home, Apple Home, SmartThings, Home Assistant and Matter. The Max 775 recharges in about 6 hours against 4.5 for the 505X. Pick the iRobot Roomba Max 775 Combo Robot + AutoWash Dock for stronger suction and automatic detergent, and the iRobot Roomba 505X to spend less on a capable combo.
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| Feature | iRobot Roomba 505X | iRobot Roomba Max 775 Combo Robot + AutoWash Dock | Winner |
|---|---|---|---|
| Price | $784.80 | $799.99 | iRobot Roomba 505X |
| Rating | 3.3 | 3.4 | iRobot Roomba Max 775 Combo Robot + AutoWash Dock |
| Suction Power | 7000Pa | 30000Pa | iRobot Roomba Max 775 Combo Robot + AutoWash Dock |
| Warranty | 1 year | 1 year | Tie |
| Battery Life | 180 minutes | 180 minutes | Tie |
| Auto Recharge | YES | YES | Tie |
| Connectivity | 2.4 GHz WiFi, 5 GHz WiFi, Bluetooth | 2.4 GHz WiFi, Bluetooth | Tie |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Tie |
| Navigation Type | Laser (LiDAR) | Laser (LiDAR) | Tie |
| Obstacle Detection | YES | YES | Tie |
| Cliff Detection | YES | YES | Tie |
| Multi-Room Mapping | YES | YES | Tie |
What the differences mean
Suction
The iRobot Roomba Max 775 Combo Robot + AutoWash Dock is rated at 30000Pa and the iRobot Roomba 505X at 7000Pa, more than four times. On carpet and heavy pet hair that is the single largest gap between them.
Detergent
The iRobot Roomba Max 775 Combo Robot + AutoWash Dock dispenses cleaning solution on its own, so the dock tops it up as it washes. The iRobot Roomba 505X has no automatic dispenser, so any solution is added to the tank by hand.
Price
The iRobot Roomba 505X is the more affordable of the two, and it still gives you a full AutoWash dock, LiDAR mapping and a 3L dock tank. The iRobot Roomba Max 775 Combo Robot + AutoWash Dock charges a premium for the extra power and detergent.
Recharge
The iRobot Roomba 505X recharges in about 4.5 hours and the iRobot Roomba Max 775 Combo Robot + AutoWash Dock in about 6. On a long run the 505X gets back to work faster, even though both are rated at 180 minutes.
Wi-Fi bands
The iRobot Roomba 505X is listed with 2.4GHz and 5GHz Wi-Fi, and both list Bluetooth. The iRobot Roomba Max 775 Combo Robot + AutoWash Dock has sources that disagree on the bands, with iRobot's own guide and table saying different things.
Which one to buy if
- you want the strongest suction for carpet and pet hair
The iRobot Roomba Max 775 Combo Robot + AutoWash Dock is rated at 30000Pa against 7000Pa for the iRobot Roomba 505X.
- you want the dock to add cleaning solution automatically
The iRobot Roomba Max 775 Combo Robot + AutoWash Dock dispenses detergent itself, while the iRobot Roomba 505X needs it added by hand.
- you want to spend less on a full-service combo
The iRobot Roomba 505X costs less and still empties, refills, washes and dries at the dock, with a 3L tank and the same platform support.
- you want a faster recharge
The iRobot Roomba 505X recharges in about 4.5 hours against about 6 for the iRobot Roomba Max 775 Combo Robot + AutoWash Dock.
22% OFF
$784.80
$999.99
- + Price: $784.80
- - Rating: 3.3 vs 3.4
- - Suction Power: 7000Pa vs 30000Pa
Winner
20% OFF
$799.99
$999.99
- + Rating: 3.4
- + Suction Power: 30000Pa
- - Price: $799.99 vs $784.80
What owners say
Owners of the iRobot Roomba 505X lead with how much the AutoWash dock removes from their week: it empties the bin, refills water and washes and dries the mop pads without help, which the happy ones say is the reason they stop thinking about floor care. They praise accurate LiDAR mapping, reliable hard-floor and tile cleaning, and pet-hair pickup, and they appreciate that vacuuming and mopping run in one pass. The listed trade-offs match what those owners report: the cleaning cycle is loud enough that many schedule runs for when they are out, setup can be finicky with Wi-Fi pairing, and a few see mapping that needs a reset, plus a mop that lifts over carpet rather than cleaning it deeply.
Frequently Asked Questions
Which is better overall: iRobot Roomba 505X or iRobot Roomba Max 775 Combo Robot + AutoWash Dock?
The iRobot Roomba Max 775 Combo Robot + AutoWash Dock for maximum suction and automatic detergent, at a higher price. The iRobot Roomba 505X is the better value, with the same full-service dock and plenty of power for most homes.
What is the biggest difference between the iRobot Roomba 505X and the iRobot Roomba Max 775 Combo Robot + AutoWash Dock?
Suction. The iRobot Roomba Max 775 Combo Robot + AutoWash Dock is rated at 30000Pa against 7000Pa for the iRobot Roomba 505X, and it adds automatic detergent dispensing.
Do both of these iRobot combos wash their own mops?
Yes. The iRobot Roomba 505X and the iRobot Roomba Max 775 Combo Robot + AutoWash Dock both empty the bin and wash and dry the mop pads at the dock and lift the mop on carpet. Neither is a full mop-scrubbing system.
Does the iRobot Roomba 505X add detergent automatically?
No. Any cleaning solution is added to the tank by hand. The iRobot Roomba Max 775 Combo Robot + AutoWash Dock is the one of the two with an automatic detergent dispenser.
Who should buy the iRobot Roomba 505X?
Buyers who want a hands-off vacuum and mop combo, mostly on hard floors and low rugs, and who prefer to save money over maximum suction.
Who should buy the iRobot Roomba Max 775 Combo Robot + AutoWash Dock?
Carpeted homes with pets that want the strongest rated suction and automatic detergent, and are willing to pay more and wait longer to recharge.
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