Robot Vacuums · Head to head

iRobot Roomba Plus 515 Combo Robot + AutoWash Dock vs Roborock Saros 20 Flow

Full Robot Vacuums comparison in 2026

Updated October 2026
Data from Amazon and official iRobot and Roborock sites.
2026 verdict
The Roborock Saros 20 Flow takes this matchup on suction and smart home reach, and the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock answers on price and a lower body.
Roborock Saros 20 Flow
Winner
Roborock Saros 20 Flow
$1499.99$1699.9912% OFF

Last recorded price

Buy on Amazon USA
The Roborock is rated at 36,000 Pa against 22,000 Pa and supports Alexa, Google Home, Apple Home, SmartThings, Home Assistant and Matter, where the iRobot works with Alexa and Google Home only. The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is the more affordable of the pair, stands 84 mm tall against 89.8 mm, though its 200 minute runtime trails the Roborock's 301. Pick the Roborock Saros 20 Flow for suction, ecosystem reach and a longer run, and the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock for value and a slimmer body.
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FeatureiRobot Roomba Plus 515 Combo Robot + AutoWash DockRoborock Saros 20 FlowWinner
Price$599.00$1499.99iRobot Roomba Plus 515 Combo Robot + AutoWash Dock
Rating4.24.0iRobot Roomba Plus 515 Combo Robot + AutoWash Dock
Battery Life200 minutes301 minutesRoborock Saros 20 Flow
IntegrationsGoogle Home, AlexaGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterRoborock Saros 20 Flow
Suction Power22000Pa36000PaRoborock Saros 20 Flow
Warranty1 year1 yearTie
Auto RechargeYESYESTie
Connectivity2.4 GHz WiFi, Bluetooth2.4 GHz WiFiTie
Navigation TypeLaser (LiDAR)Laser (LiDAR)Tie
Obstacle DetectionYESYESTie
Cliff DetectionYESYESTie
Multi-Room MappingYESYESTie

What the differences mean

Suction

The Roborock Saros 20 Flow is rated at 36,000 Pa and the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock at 22,000 Pa, so the Roborock has more headroom for embedded dirt and pet hair, while the iRobot is already strong for this tier on hard floors and low rugs.

Smart home support

The Roborock Saros 20 Flow supports Alexa, Google Home, Apple Home, SmartThings, Home Assistant and Matter through its Matter support. The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock works with Alexa and Google Home only, so Apple Home and SmartThings are not options.

Height and run time

The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock stands 84 mm tall and is rated for a 200 minute runtime. The Roborock Saros 20 Flow is slightly taller at 89.8 mm but runs up to 301 minutes, so it covers far more floor per charge while the iRobot is the one that fits the lower gap.

Mop and detergent

The Roborock Saros 20 Flow washes, dries and lifts its mop and dispenses cleaning solution automatically from its dock. The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock washes and heat-dries its pads but has no automatic detergent dispenser, so solution is added by hand.

Which one to buy if

Winner
Roborock

Roborock Saros 20 Flow

12% OFF
Prime exclusive deal
$1499.99
$1699.99

Last recorded price

Buy on Amazon USA
  • + Battery Life: 301 minutes
  • + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
  • + Suction Power: 36000Pa
  • - Price: $1499.99 vs $599.00
  • - Rating: 4.0 vs 4.2

What owners say

Owners of the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock describe it as a vacuum first and a mop second, and they are happy with that split. Suction earns the most praise, lifting pet hair, crumbs and dust from wood, tile, vinyl and low rugs, and the LiDAR map comes out accurate for most buyers. The AutoWash dock is the other highlight, emptying the bin and washing and heat-drying the pads without being asked. Their complaints are the mop, which they rate as only decent and prone to snagging on cords, the 2.4 GHz-only Wi-Fi that made setup difficult for several, a loud self-emptying cycle, and a dirty water tank that needs emptying promptly to avoid smells.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • iRobot Roomba Plus 515 Combo Robot + AutoWash Dock
  • Roborock Saros 20 Flow

Loading price history...

Frequently Asked Questions

Which is better, the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock or the Roborock Saros 20 Flow?

For suction and smart home reach, the Roborock Saros 20 Flow, with 36,000 Pa and support for Apple Home, SmartThings and Matter. The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is the value pick, with the lower price and a slimmer 84 mm body.

What is the biggest difference between the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock and the Roborock Saros 20 Flow?

Suction and ecosystem. The Roborock Saros 20 Flow is rated at 36,000 Pa and works with every major platform, while the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock is rated at 22,000 Pa and stops at Alexa and Google Home.

Do the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock and the Roborock Saros 20 Flow connect on 5 GHz Wi-Fi?

No. Both are 2.4 GHz only. On a router that broadcasts both bands under one name, separating the 2.4 GHz band usually makes the first setup easier for either robot.

Do both robots wash and dry their mops?

Yes. The iRobot Roomba Plus 515 Combo Robot + AutoWash Dock washes and heat-dries its pads, and the Roborock Saros 20 Flow washes, dries and lifts its mop. Only the Roborock dispenses cleaning solution automatically.

Who should buy the iRobot Roomba Plus 515 Combo Robot + AutoWash Dock?

Buyers who want a lower price, a slim 84 mm body and strong vacuuming for pet hair and hard floors, within an Alexa or Google Home household.

Who should buy the Roborock Saros 20 Flow?

Homes with carpet that want maximum suction, buyers who need Apple Home, SmartThings or Matter support, and anyone who wants the mop washed, dried and dosed with detergent automatically.

Full comparison table

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