Winner
23% OFF
$769.95
$999.99
Updated October 2026
Data from the official iRobot site.
2026 verdict
On paper the newer Roomba Plus 515 Combo wins on battery and suction; in practice the iRobot Roomba 505X is the easier recommendation.
It is the more affordable of the two and the only one of the pair with dual-band Wi-Fi and Matter, so it reaches Apple Home, SmartThings and Home Assistant, where the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is 2.4GHz only and stops at Alexa and Google Home. The Roomba Plus 515 does out-pull the 505X on paper, at 22,000Pa against 7,000Pa, and runs 200 minutes against 180, but it charges in about six hours and its 84 mm body is a shade taller. Choose the iRobot Roomba 505X for the broader ecosystem and the lower price, and the Roomba Plus 515 Combo if stronger suction and a longer run matter most.
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| Feature | iRobot Roomba 505X | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock | Winner |
|---|---|---|---|
| Price | $769.95 | $599.00 | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock |
| Battery Life | 180 minutes | 200 minutes | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock |
| Connectivity | 2.4 GHz WiFi, 5 GHz WiFi, Bluetooth | 2.4 GHz WiFi, Bluetooth | iRobot Roomba 505X |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa | iRobot Roomba 505X |
| Suction Power | 7000Pa | 22000Pa | iRobot Roomba Plus 515 Combo Robot + AutoWash Dock |
| Rating | 4.2 | 4.2 | Tie |
| Warranty | 1 year | 1 year | Tie |
| Auto Recharge | YES | YES | 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 power
22,000Pa against 7,000Pa. The Roomba Plus 515 Combo has the stronger motor and owners call it very good on wood, tile and low rugs, while the iRobot Roomba 505X relies more on its mapping and dock than on raw pressure.
Wi-Fi and ecosystems
The iRobot Roomba 505X supports dual-band Wi-Fi and Matter for Apple Home, SmartThings and Home Assistant. The Roomba Plus 515 Combo is 2.4GHz only and works with Alexa and Google Home, with no Apple Home, SmartThings or Matter, which is the gap that decides this pair.
Battery and recharge
The Roomba Plus 515 Combo is rated at 200 minutes against 180 on the iRobot Roomba 505X, but it recharges in about six hours where the 505X takes around 4.5. On back-to-back runs the 505X spends less time idle.
Height and access
The Roomba Plus 515 Combo is 84 mm tall and the iRobot Roomba 505X about 107 mm. That makes the 515 the better robot for low beds and sofas, one of the few places it clearly beats the 505X.
Price
The iRobot Roomba 505X is the more affordable robot of the pair, and it is the one that carries the wider ecosystem support at that lower price, which is why it takes this comparison despite the suction gap.
Which one to buy if
- your smart home runs on Apple Home or Matter
The iRobot Roomba 505X is Matter-enabled and dual-band, reaching Apple Home, SmartThings and Home Assistant; the Roomba Plus 515 Combo is 2.4GHz and supports neither.
- your furniture sits low to the floor
At 84 mm the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is over two centimetres slimmer than the Roomba 505X and reaches under lower gaps.
- you want the strongest suction of the pair
The Roomba Plus 515 Combo is rated at 22,000Pa against 7,000Pa on the Roomba 505X, a much larger reserve for carpet and embedded dirt.
- you want the lower price and the wider support
The iRobot Roomba 505X costs less and adds Matter and dual-band Wi-Fi, even though it gives up suction and a little battery next to the Roomba Plus 515 Combo.
Winner
23% OFF
$769.95
$999.99
- + Connectivity: 2.4 GHz WiFi, 5 GHz WiFi, Bluetooth
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- - Price: $769.95 vs $599.00
- - Battery Life: 180 minutes vs 200 minutes
14% OFF
$599.00
$699.99
- + Price: $599.00
- + Battery Life: 200 minutes
- + Suction Power: 22000Pa
- - Connectivity: 2.4 GHz WiFi, Bluetooth vs 2.4 GHz WiFi, 5 GHz WiFi, Bluetooth
- - Integrations: Google Home, Alexa vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
What owners say
Owners of both Roombas start from the same place: the AutoWash dock removes the chores that normally come with a robot, emptying the bin and washing and heat-drying the mop pads so the routine shrinks to refilling water and changing a bag. Each group then notices different things. iRobot Roomba 505X owners praise the precise LiDAR mapping with multi-room support and no-go zones, the 3L water reservoir and how well it handles pet hair, while their complaints are a loud cleaning cycle, some fiddly first Wi-Fi pairing, and infrared cliff sensors that misread very dark floors. Owners of the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock highlight the 22,000Pa suction on wood, tile and low rugs, the accurate map and the low 84 mm body, and they warn that mopping is only decent, the pads can snag on cords, the dirty water tank smells if left, and the 2.4GHz setup is the most common early frustration.
Frequently Asked Questions
Which is better overall: iRobot Roomba 505X or iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?
The iRobot Roomba 505X for most buyers, because it pairs a self-emptying, self-washing dock with dual-band Wi-Fi and Matter at a lower price. The Roomba Plus 515 Combo is the stronger cleaner on paper at 22,000Pa and a slimmer body, but it has no Matter, Apple Home or SmartThings.
What is the biggest difference between the iRobot Roomba 505X and the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?
Ecosystem support against suction. The Roomba 505X adds Matter and dual-band Wi-Fi, while the Roomba Plus 515 Combo reaches 22,000Pa against 7,000Pa and stands 84 mm tall against 107 mm.
Do both Roombas work with Apple Home and Matter?
No. The iRobot Roomba 505X is Matter-enabled, so it joins Apple Home, SmartThings and Home Assistant. The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is 2.4GHz only and works with Alexa and Google Home, with no Apple Home, SmartThings or Matter.
Which is better for pet hair, the iRobot Roomba 505X or the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?
Both handle pet hair well and both self-empty and wash their mop pads. The Roomba Plus 515 Combo has the higher 22,000Pa rating, while the Roomba 505X adds the wider smart home support and a lower price.
Who should buy the iRobot Roomba 505X?
Buyers who want precise LiDAR mapping, no-go zones and full Matter support with Apple Home and SmartThings, and who value the lower price over the highest suction.
Who should buy the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?
Homes that want the strongest suction of this pair and a low 84 mm body for under-furniture access, and that are happy with Alexa and Google Home instead of Matter.
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