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- Table of Contents
- Top
- Main Differences
- Design
- Performance
- Automation
- To Be Deleted
- Comments
iRobot Roomba S9 vs Roborock S4 Max
Side-by-Side Comparison
Products
iRobot Roomba S9
Roborock S4 Max
Tested using Methodology v0.8
Updated Jan 10, 2025 04:39 PM
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Amazon.comTested using Methodology v0.7
Updated Jan 20, 2025 06:51 PM
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Amazon.com
Wet CompatibleNo
Anti-Allergy Filter (HEPA)Yes
Wet CompatibleNo
Vacuum TypeRobot
BaglessYes
CordlessYes
Anti-Allergy Filter (HEPA)No
Variants
- Roomba S9 (Black)
- Roomba S9+ (Black)
- S4 Max (Black)
Our Verdict
iRobot Roomba S9
Roborock S4 Max
The iRobot Roomba S9 is a better robot vacuum than the Roborock S4 Max. The iRobot is better built, uses a larger internal dustbin, and charges in a little under a third of the time as the Roborock. The Roborock also delivers superior performance on all surface types.
Check Price
Black
Roomba S9
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Amazon.comBlack
S4 Max
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Amazon.comBlack
Roomba S9+
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Amazon.comBlack
S4 Max
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Walmart.comBlack
S4 Max
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B&HBlack
S4 Max
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BestBuy.comNotice: Two or more of the products selected have been tested with different test methodologies, so some of the results below aren't directly comparable. Learn how our test benches and scoring system work, and read more about the latest changes to our robot vacuums test methodology.
Main Differences for
Threshold
Bare Floor
7.4
7.6
Airflow
8.2
3.6
Noise
7.0
9.2
User Maintenance
7.5
6.0
Full Comparison
Design
Build Quality
8.0
Vacuum Type
Robot
Build Quality Picture
Build Quality
8.5
Build Quality Picture
Vacuum & Mop Combo
No
User Maintenance
7.5
6.0
Maintenance Picture
Brushroll Cleaning Video
Recurring Cost
4.5
5.0
Recurring Cost Picture
Bag Part Number
No bag
No bag
Filter Part Number
4643682
E11
HEPA Filter Part Number
4643682
No HEPA Filter
Storing
8.9
Storing Picture
Height
3.98" (10.1 cm)
Width
13.90" (35.3 cm)
Depth
16.46" (41.8 cm)
Cord Storing
Not Needed
On-Board Tool Storage
Not needed
Vacuum Rack/Station
Yes
Dimensions
Robot Vacuum Dimensions
Robot Vacuum Height
9.6 cm (3.8")
Robot Vacuum Width
31.6 cm (12.4")
Robot Vacuum Depth
31.6 cm (12.4")
Docking Station Dimensions
Docking Station Height
10.7 cm (4.2")
Docking Station Width
25.9 cm (10.2")
Docking Station Depth
36.0 cm (14.2")
Dirt Compartment
7.1
Dirt Compartment Picture
Bagless
Yes
Volume
0.11 gal (0.42 L)
Full Indicator
Yes
Bag Included
No Bag Needed
Internal Dirt Compartment
8.1
Dirt Compartment Photo
Dirt Compartment Capacity
0.50 L
Full Indicator
Yes
Station Maintenance Capabilities
0.0
Station Photo
Auto Empty
No
Bagless Station
No Dirt Compartment
Dirt Compartment Capacity
0.00 L
Automatic Tank Refill
No
Mop Washing
No
Mop Drying
No
In The Box
In The Box Picture
Range
10
Cordless
Yes
Cord Length
N/A
Hose Length
N/A
Minimum Wand Length
N/A
Maximum Wand Length
N/A
Total Range
N/A
Portability
8.0
Total Weight
7.21 lbs (3.27 kg)
Weight In Hand
0.00 lbs (0.00 kg)
Carrying handle
No
Battery
9.2
8.8
Minimum Battery Life
49 min
112 min
Maximum Battery Life
155 min
207 min
Recharge Time
92 min
300 min
Recharge Dock
Yes
Battery Life Indicator
Yes
Removable Batteries
Yes
No
Quality-Of-Life Features
Picture Of Controls
Power Adjustment
Yes
Yes
Easy On/Off
Yes
Yes
Surface Type Adjustment
Only Automatic
Rotating Head
No
Self-Propelled
Yes
Headlights
No
Head Surface Type Adjustment
Only Automatic
Brushroll And Tools
Brushroll And Tools Photo
Brushroll Setup
Dual
Brushroll Type
Rubber
Side Brush Setup
Single
Side Brush Type
Fixed
Tools And Brushes
Tools And Brush Picture
Brushroll
Yes
Brushroll On/Off
No
Removable Brushroll
Yes
Turbo Brush
No
Crevice Tool
No
Upholstery Tool
No
Soft Bristle Brush
No
Hard Bristle Brush
No
Extension Wand
No
Ceiling Fan Tool
No
Pet Grooming Tool
No
Alternative Configuration
Alternative Configuration Photo 1
Alternative Configuration Photo 2
Blower Mode
No
Performance
Bare Floor Performance (Hardwood, Laminate, Tiles)
9.3
Setting Used
"Max"
Bare Floor Large Debris Graph
Large Debris at 0 gal (0L)
99%
Large Debris at 0.07 gal (0.25L)
78%
Large Debris at 0.2 gal (0.75L)
N/A
Large Debris at 0.4 gal (1.5L)
N/A
Large Debris at 0.8 gal (3L)
N/A
Large Debris at 1.6 gal (6L)
N/A
Bare Floor Small Debris Graph
Small Debris at 0 gal (0L)
100%
Small Debris at 0.07 gal (0.25L)
≈ 100%
Small Debris at 0.2 gal (0.75L)
N/A
Small Debris at 0.4 gal (1.5L)
N/A
Small Debris at 0.8 gal (3L)
N/A
Small Debris at 1.6 gal (6L)
N/A
Hard Floor Pick-Up
8.5
Hard Floor Pick-Up Video
Hard Floor Pick-Up Post Test
High-Pile Carpet Pick-Up
8.0
High-Pile Carpet Pick-Up Video
High-Pile Carpet Pick-Up Post Test
Low-Pile Carpet Pick-Up
7.5
Low-Pile Carpet Pick-Up Video
Low-Pile Carpet Pick-Up Post Test
Pet Hair Pick-Up
7.5
Pet Hair Pick-Up Video
Pet Hair Pick-Up Post Test
Low-Pile Carpet Performance
4.8
Setting Used
"Max"
Low Carpet Large Debris Graph
Large Debris at 0 gal (0L)
40%
Large Debris at 0.07 gal (0.25L)
≈ 39%
Large Debris at 0.2 gal (0.75L)
N/A
Large Debris at 0.4 gal (1.5L)
N/A
Large Debris at 0.8 gal (3L)
N/A
Large Debris at 1.6 gal (6L)
N/A
Low Carpet Small Debris Graph
Small Debris at 0 gal (0L)
24%
Small Debris at 0.07 gal (0.25L)
≈ 23%
Small Debris at 0.2 gal (0.75L)
N/A
Small Debris at 0.4 gal (1.5L)
N/A
Small Debris at 0.8 gal (3L)
N/A
Small Debris at 1.6 gal (6L)
N/A
High-Pile Carpet Performance
6.0
Setting Used
"Max"
High Carpet Large Debris Graph
Large Debris at 0 gal (0L)
46%
Large Debris at 0.07 gal (0.25L)
≈ 45%
Large Debris at 0.2 gal (0.75L)
N/A
Large Debris at 0.4 gal (1.5L)
N/A
Large Debris at 0.8 gal (3L)
N/A
Large Debris at 1.6 gal (6L)
N/A
High Carpet Small Debris Graph
Small Debris at 0 gal (0L)
26%
Small Debris at 0.07 gal (0.25L)
≈ 25%
Small Debris at 0.2 gal (0.75L)
N/A
Small Debris at 0.4 gal (1.5L)
N/A
Small Debris at 0.8 gal (3L)
N/A
Small Debris at 1.6 gal (6L)
N/A
Pet Hair Floor Performance
8.1
Pet Hair Graph
Bare Floor
99%
Low-Pile Carpet
68%
High-Pile Carpet
68%
Suction
5.7
0.0
Suction Video
Maximum Hose Suction
N/A
Maximum Head Suction
0.2 inH₂O (0.05 kPa)
0.1 inH₂O (0.02 kPa)
Normal Head Suction
0.0 inH₂O (0.01 kPa)
0.0 inH₂O (0.01 kPa)
Setting Used For Normal
"Detailed Clean", (App)
"Balanced" (App)
Hose Diameter
N/A
Airflow
8.2
3.6
Maximum Airflow Video
Maximum Head Airflow
16.0 CFM (0.5 m³/min)
19.1 CFM (0.5 m³/min)
Noise
7.0
9.2
Noise Video
Bare Floor
65.2 dBA
63.2 dBA
Low-Pile Carpet
64.7 dBA
63.5 dBA
Maneuverability
8.5
8.0
Maneuverability Video
Pet Hair Furniture Performance
0.0
Sofa Pickup Video
Sofa Pickup Post Test
Air Quality
Sealing Quality Video
Anti-Allergy Filter (HEPA)
Yes
No
Cracks
4.5
4.5
Cracks Video
Wood Cracks Post Test
Stains
1.0
1.0
Stain Video
Stain Pickup Post Test
Water
0.0
0.0
Wet Compatible
No
No
Water Video
Water Pickup Post Test
Automation
Physical Automation
8.9
7.1
Recharge And Resume
Yes
Automatic Recharging
Yes
Automatic Bag Emptying
No
Pathing Algorithm
Smart
Smart
Physical Boundary Markers
No
No
Scheduled Start Buttons
No
No
Cycle Control Buttons
On-Board Only
Onboard Only
Navigation Control Buttons
Return To Base Only
Return to Base Only
Companion App Automation
8.0
8.5
Companion App Screen Grabs
App Name
iRobot HOME
Roborock
Software Boundary Markers (No-Go Zones)
Yes
Yes
App Scheduled Start
Yes
Yes
App Cycle Control
Yes
Yes
Navigation Control Within App
No
Yes
iOS Availability
Yes
Android Availability
Yes
To Be Deleted
Check Price
Black
Roomba S9
SEE PRICE
Amazon.comBlack
S4 Max
SEE PRICE
Amazon.comBlack
Roomba S9+
SEE PRICE
Amazon.comBlack
S4 Max
SEE PRICE
Walmart.comBlack
S4 Max
SEARCH
B&HBlack
S4 Max
SEARCH
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iRobot Roomba S9
Roborock S4 Max
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iRobot Roomba S9 vs Roborock S4 Max: Main Discussion
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