Eufy Omni S2 vs Roborock Saros 20 Flow
Researched by Riley Hart · prices checked Oct 31, 2026
As of Oct 31, 2026, the Eufy Omni S2 costs $1,600 and the Roborock Saros 20 Flow costs $1,700, so the Eufy Omni S2 is $100 cheaper. The Roborock Saros 20 Flow scores higher in our ranking (6.4 vs 5.6 out of 10). Pick the Eufy Omni S2 for cluttered homes with carpet and pets. Pick the Roborock Saros 20 Flow for hard floor homes with tall thresholds.
- Suction
- 30,000 Pa
- Navigation
- 3D ToF and camera
- Mopping
- Roller mop
- Runtime
- Up to 180 min
A good fit for busy homes with carpet, pets and clutter on the floor, since it was the only robot here to avoid all 24 obstacles in Vacuum Wars testing and it never tangled hair. Mopping is fine for daily grime but several reviewers found it weak on tough dried stains. Skip it if stain removal matters most or if you mind paying for Eufy's own detergent and fragrance refills.
Full Eufy Omni S2 review →- Suction
- 36,000 Pa claimed
- Navigation
- Retractable LiDAR
- Mopping
- SpiraFlow 2.0 roller mop
- Runtime
- Not listed in minutes
A top end pick for homes with high thresholds, mostly hard floors and pets, since the roller mop and 3.46 in climbing set it apart. Reviewers praised its mopping and pet hair handling but noted weak corner and edge cleaning. Skip it if you want the cheapest way to get a self cleaning dock.
Full Roborock Saros 20 Flow review →Side by side
| Eufy Omni S2 | Roborock Saros 20 Flow | |
|---|---|---|
| Price | $1,600 | $1,700 |
| 3 year cost | $2,080 | $1,777 |
| Our score | 5.6/10 | 6.4/10 |
| Rank in Floors | #41 | #30 |
| Status | on sale | on sale |
| Warranty | n/a | 1 year (Roborock US store) |
| Suction | 30,000 Pa (brand claim), AeroTurbo 2.0 | 36,000 Pa claimed (Roborock); House Digest could not verify it but estimated floors came out about 90% clean |
| Navigation | CleanMind AI with 3D MatrixEye 2.0 (ToF sensors plus camera), 3D mapping | Retractable LiDAR (RetractSense) that lowers under furniture, plus VertiBeam side structured light (Roborock) |
| Obstacle avoidance | Detects obstacles over 1 cm and 200+ object types (brand claim); Vacuum Wars scored a perfect 24 of 24 | Reactive AI with structured light and RGB camera, 300+ object types, objects down to 3 cm wide and 3 cm tall (Roborock); House Digest saw it get lost once |
| Mopping | Yes, HydroJet 2.0 self cleaning roller mop, 15 N pressure, extends to edges and lifts 28 mm on carpet | SpiraFlow 2.0 roller mop, up to 240 rpm, 15 N pressure, 16 pressurized outlets, extends up to 44 mm for edges and lifts up to 15 mm on carpet (Roborock) |
| Self empty | Yes, auto empties into a 2.5 L bag rated for up to 68 days | Yes, auto empty into a bag, up to 65 days without manual emptying (Roborock); bag size not listed |
| Dock features | UniClean station washes the roller at 140°F, dries at 131°F, doses detergent, auto refill and drain options, plus a fragrance diffuser; 3 L clean and 2 L dirty tanks | Roller wash with water up to 212°F, 145°F warm air drying, auto detergent dosing, warm water refill of the robot tank (Roborock) |
| Runtime | Up to 180 min (TechRadar); Vacuum Wars estimated about 1,088 sq ft per charge | Not listed in minutes; Roborock says up to 200 m² per charge in standard vacuum and mop mode, 6,400 mAh battery, 150 min full charge |
| Dustbin | Onboard bin size not published; dock bag 2.5 L | n/a |
| Height | 3.4 in (85 mm) per TechRadar | 3.54 in robot height (Roborock landing page); the store page lists 89.8 mm |
| Pet hair | Vacuum Wars measured 88.5% flattened pet hair pickup and 0% hair wrap with DuoSpiral brushes | House Digest said heavy pet fur left no hair balls on the dual anti tangle brushes |
| App | Eufy app with Siri, Alexa, Google Home and Matter support | Roborock app; works with Alexa, Siri, Google Home and Matter; built in Hello Rocky voice assistant (Roborock) |
| Threshold | Up to 1.65 in double and 1.38 in single thresholds (brand claim); Vacuum Wars cleared 32 mm on 1 of 3 tries | Double layer thresholds up to 3.46 in (88 mm) with AdaptiLift Traverse 3.0 (Roborock); House Digest saw it clear a baby gate with a thud |
| Noise | n/a | No dB figure from Roborock or the reviews we read; House Digest says Carpet Boost is the loudest mode |
| Best for | cluttered homes with carpet and pets | hard floor homes with tall thresholds |
| Skip if | you need strong stain removal | you are on a budget or need spotless corners |
Specs are maker claims unless a reviewer is named. Prices from the stores we link, checked daily.
What reviewers found
Eufy Omni S2
- Vacuum Wars (3.91/5): 87% carpet sand removal (S1 managed 61%), 88.5% flattened pet hair, 0% hair wrap and a perfect 24 of 24 obstacles; dried stain mopping and navigation speed were below average. Source
- TechRadar: Much better vacuuming than the Omni S1 with strong mopping and reliable navigation; about 55 dB in Quiet mode and 70 dB in Cyclone mode; one unit developed a connection fault and was replaced. Rated 5/5 design, 4.5/5 performance and 3.5/5 value, with no single overall score. Source
- Android Authority: Called it one of the best robot vacuums the reviewer has tested, with zero collisions and no hair tangles, but noticeably louder than other recent flagships. Source
Roborock Saros 20 Flow
- House Digest (9/10): Floors came out about 90% clean with some crumbs left in corners. Mopping fully removed ketchup and barbecue sauce and left wood almost dry. It cleared a baby gate but got lost once and had underwhelming edge cleaning. Source
- EFTM (92%): Australian review gave vacuuming 93%, mopping 93%, app 92% and features 93%. It cleaned dried jam and tomato sauce, needed two passes for Vegemite and struggled with crumbs near cabinets. Charging was slow. Source
Pros and cons
Eufy Omni S2
Pros
- Perfect 24 of 24 obstacle avoidance in Vacuum Wars testing
- Big carpet cleaning gain over the Omni S1
- No hair wrap in testing
- Self cleaning roller mop and drying dock
- Published replacement interval makes running costs predictable
Cons
- Expensive at $1,599.99 list
- Weak on dried stains compared with the S1
- Louder than rival flagships per Android Authority
- Detergent and fragrance refills are proprietary
- Slower navigation and lower coverage per charge
Roborock Saros 20 Flow
Pros
- Roller mop removed ketchup and sauce in testing
- Climbs double thresholds up to 3.46 in
- Dock washes the roller with near boiling water
- Strong pet hair handling with no hair balls
- Matter, Alexa, Siri and Google Home support
Cons
- High price at $1,699.99
- Corner and edge cleaning was weak in reviews
- App settings are hard to find
- Slow 150 min recharge
- Detergent sold separately
Questions buyers ask
Which is better, the Eufy Omni S2 or the Roborock Saros 20 Flow?
The Roborock Saros 20 Flow scores higher in our ranking (6.4 vs 5.6 out of 10). Pick the Eufy Omni S2 for cluttered homes with carpet and pets. Pick the Roborock Saros 20 Flow for hard floor homes with tall thresholds.
Which is cheaper?
The Eufy Omni S2 at $1,600, versus $1,700 for the Roborock Saros 20 Flow, checked Oct 31, 2026. Over 3 years with running costs: $2,080 vs $1,777.
What is the difference between the Omni S2 and the Saros 20 Flow?
Suction: 30,000 Pa (brand claim), AeroTurbo 2.0 on the Omni S2, 36,000 Pa claimed (Roborock); House Digest could not verify it but estimated floors came… on the Saros 20 Flow. Navigation: CleanMind AI with 3D MatrixEye 2.0 (ToF sensors plus camera), 3D mapping on the Omni S2, Retractable LiDAR (RetractSense) that lowers under furniture, plus VertiBeam side… on the Saros 20 Flow. Obstacle avoidance: Detects obstacles over 1 cm and 200+ object types (brand claim); Vacuum Wars scored a… on the Omni S2, Reactive AI with structured light and RGB camera, 300+ object types, objects down to 3… on the Saros 20 Flow.
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