The ECOVACS WINBOT W2S OMNI is the best robot window cleaner overall in our scoring at 75 out of 100: ECOVACS lists a Cordless Mode for 110 minutes, a power-off protection duration of 30 min, Max. Suction Power 8000 Pa, an 80ml water tank and a TruEdge edge scrubber, at $407.55 on its US store. The best value is the ECOVACS WINBOT mini 2 at $178.60, the lowest price on this list, with a power-off hold of over 30 minutes. Every score is our own judgment from maker pages read on 2026-11-03, and no company paid for or adjusted a position.
Not published on Mamibot’s W120-DP page read on 2026-11-03
Framed and frameless vertical windows where a slim 6.9cm body and app or remote control help
Pick by what you want
Best overall
ECOVACS WINBOT W2S OMNI
Best value
ECOVACS WINBOT mini 2
Biggest tank on an Ecovacs
ECOVACS WINBOT W2S PRO OMNI
Station washes the pad for you
ECOVACS WINBOT W3 OMNI
Ultrasonic mist under $200
HOBOT-298
Squeegee pass and largest tank
Mamibot iGLASSBOT W300
The ranking
1
ECOVACS WINBOT W2S OMNI
Answrs VerdictIt scores 75 of 100, first on a 110-minute cordless mode, a 30 min power-off hold, an 80ml tank and a $407.55 price.
Price: $407.55 on ECOVACS’ US store read on 2026-11-03Cordless runtime: Cordless Mode for 110 minutes, or Wired Mode for non-stop cleaningSuction and tank: Max. Suction Power 8000 Pa; suction power while moving 3000±100 Pa; 80ml water tank that can clean up to 55 square metersSafety: 12-stage protection; power-off protection duration 30 min; safety rope with a tensile strength of up to 100KG; 1 m backup safety ropeEdges: TruEdge scrubber at up to 200 revolutions per minute; Quad-Edge Cleaning Mode with 1.1cm edge-to-edge precision; WIN-SLAM 4.0
ECOVACS’ US store lists the WINBOT W2S OMNI at $407.55. It switches between a Cordless Mode for 110 minutes and a Wired Mode for non-stop cleaning, so an outlet far from the window is no problem. The spec table gives Max. Suction Power 8000 Pa and suction power while moving of 3000±100 Pa, and the 80ml water tank can clean up to 55 square meters. At the frame, a TruEdge scrubber lowers and spins at up to 200 revolutions per minute, and Quad-Edge Cleaning Mode reaches 1.1cm edge-to-edge precision. Safety is a 12-stage protection system, a 30 min power-off protection duration, a safety rope rated up to 100KG and a 1 m backup rope.
Go ifMost homes: it runs cordless from its station for 110 minutes, holds for 30 min if power is lost, and scrubs frame edges with TruEdge for $407.55
Skip ifYou want the station to wash the cleaning pad for you, which only the W3 OMNI here does
Why #1 over #2: It leads the W2S PRO OMNI by 75 points to 70 on a lower $407.55 price; the PRO has a bigger 120ml tank.
2
ECOVACS WINBOT W2S PRO OMNI
Answrs VerdictIt scores 70, with 110 minutes cordless, an over-30-minute low-power hold and a 120ml tank, held back by its $499.00 price.
Price: $499.00 on ECOVACS’ US store read on 2026-11-03Cordless runtime: Integrated lithium battery for continuous operation of up to 110 minutes on a single chargeTank: 120ml water tank (4.1 fl oz), which ECOVACS says can clean up to 807 square feet continuouslySafety: 12-stage fall-prevention system; remains attached to the window for over 30 minutes when the power level is low; 5m safety rope with a tensile strength of up to 1000NEdges: TruEdge 2.0 with an eight-tooth radial brush layout and automatic pad-lift; WIN-SLAM 4.0
ECOVACS’ US store lists the WINBOT W2S PRO OMNI at $499.00. Its integrated lithium battery runs for up to 110 minutes on a single charge, and its 120ml water tank (4.1 fl oz) is rated to clean up to 807 square feet continuously. TruEdge 2.0 uses an eight-tooth radial brush layout with automatic pad-lift at the frame, and WIN-SLAM 4.0 plans the route. ECOVACS lists a 12-stage fall-prevention system, says the robot remains attached for over 30 minutes when the power level is low, and includes a 5m safety rope with a tensile strength of up to 1000N.
Go ifBig glass walls: its 120ml tank is the largest of the Ecovacs picks here and ECOVACS rates it for up to 807 square feet per fill
Skip ifYou can live with an 80ml tank and want to save money with the W2S OMNI
Why #2 over #3: It scores 70 against 60 for the W3 OMNI on a stated low-power hold and a lower $499.00 price, though the W3 OMNI washes its own pads.
3
ECOVACS WINBOT W3 OMNI
Answrs VerdictIt scores 60, top on runtime and the only automatic pad wash here, held back by the highest price and no stated power-off hold time.
Price: $699.99 on ECOVACS’ US store read on 2026-11-03Cordless runtime: Plug-in or battery operation; the built-in battery delivers up to 130 minutes of continuous cleaningPad washing: Vortex Wash station cleans the wiping pads in just 1 minute with sixteen high-pressure nozzles and four scrubbing discs at 200 RPMSuction and tank: Suction power while moving 3300±100Pa; water tank 80±5 mlSafety and navigation: 12-Level Protection; primary safety rope with a tensile strength of up to 100 kg plus a 1-meter safety rope on the station; WIN-SLAM 5.0
ECOVACS’ US store lists the WINBOT W3 OMNI at $699.99. Its station adds Vortex Wash, which cleans the wiping pads in just 1 minute using sixteen high-pressure nozzles and four scrubbing discs at 200 RPM. The robot runs plugged in or on battery, with up to 130 minutes of continuous cleaning on a charge, the longest stated runtime here. The spec table lists suction power while moving of 3300±100Pa and a water tank of 80±5 ml. Safety comes from 12-Level Protection, a primary safety rope rated up to 100 kg and a 1-meter rope on the station, and WIN-SLAM 5.0 handles navigation. ECOVACS does not state a power-off hold time on this page.
Go ifPeople who never want to rinse a dirty pad: the Vortex Wash station cleans it in 1 minute, and the battery runs up to 130 minutes
Skip ifYou do not want to spend $699.99, or you want a stated power-off hold time
Why #3 over #4: It ties the W2 PRO OMNI at 60 and ranks higher on 130 minutes of stated runtime against 110 minutes, plus automatic pad washing.
4
ECOVACS WINBOT W2 PRO OMNI
Answrs VerdictIt scores 60, tied with the W3 OMNI, with 110 minutes cordless and a 30min hold, held back by a 60±5 ml tank and a $499.99 price.
Price: $499.99 on ECOVACS’ US store read on 2026-11-03Cordless runtime: One single charge allows for 110 minutes of usage, which ECOVACS says equals an area of 55 square metersSuction and tank: Max. Suction Power 5500±500 Pa; suction power while moving 2800 Pa; water tank 60±5 mlSafety: 12-stage protection; power off protection time 30min on a full charge; safety rope with a tensile strength of up to 100KG and a 1m safety rope on the stationCleaning modes: 7 cleaning modes in the ECOVACS HOME App, including Edge Cleaning and Heavy-duty Cleaning; WIN-SLAM 4.0
ECOVACS’ US store lists the WINBOT W2 PRO OMNI at $499.99. One single charge allows for 110 minutes of usage, which ECOVACS says equals an area of 55 square meters. The spec table gives Max. Suction Power 5500±500 Pa, suction power while moving of 2800 Pa, a water tank of 60±5 ml and a power off protection time of 30min on a full charge. It has 12-stage protection, a safety rope rated up to 100KG and a 1m rope on the station, and the ECOVACS HOME App offers 7 cleaning modes, including Edge Cleaning and Heavy-duty Cleaning.
Go ifBuyers who want the station-and-battery setup with 7 app cleaning modes and a 30min power-off hold
Skip ifYou want TruEdge corner scrubbers or a bigger tank, both on the W2S OMNI for less money
Why #4 over #5: It scores 60 against 55 for the WINBOT mini 2 on a 110-minute cordless battery, though the mini 2 costs $178.60.
5
ECOVACS WINBOT mini 2
Answrs VerdictIt scores 55 and is our best value: the lowest price on this list at $178.60, with a 30-minute power-off hold, held back by no cordless mode and a 50±5 ml tank.
Price: $178.60 on ECOVACS’ US store read on 2026-11-03Power: Corded: battery life listed as unlimited; power-off protection keeps it attached for over 30 minutesSuction and tank: 8,000Pa suction power; suction power while moving 3400 Pa; water tank 50±5 ml; ultrasonic atomization spraySafety: 10-Tier Protection System; nylon + latex safety rope that withstands pull forces up to 1,600 N; 3.3 m safety ropeSize and navigation: ECOVACS’ most compact WINBOT; weight 1.3±0.1 kg; WIN-SLAM 4.0 with upgraded corner brushes
ECOVACS’ US store lists the WINBOT mini 2 at $178.60, the lowest price on this list. ECOVACS calls it its most compact WINBOT, at 1.3±0.1 kg. It runs on a cord, with battery life listed as unlimited, and power-off protection keeps it attached for over 30 minutes. It lists 8,000Pa suction power, suction power while moving of 3400 Pa, ultrasonic atomization spray, a water tank of 50±5 ml, upgraded corner brushes and WIN-SLAM 4.0. Safety is a 10-Tier Protection System and a nylon + latex safety rope that withstands pull forces up to 1,600 N.
Go ifFirst-time buyers with narrow or small windows who want a 30-minute power-off hold and corner brushes for $178.60
Skip ifYour windows are far from an outlet, since it has no cordless mode
Why #5 over #6: It scores 55 against 50 for the WINBOT mini on a lower $178.60 price and the newer WIN-SLAM 4.0.
6
ECOVACS WINBOT mini
Answrs VerdictIt scores 50 on a 30-minute blackout hold and a $239.99 price, held back by no cordless mode and the older WIN-SLAM 3.0.
Price: $239.99 on ECOVACS’ US store read on 2026-11-03Power: Corded: battery life listed as unlimited; blackout protection keeps it on the window for over 30 minutes while sounding an alarmSuction and tank: 7500Pa suction power; suction power while moving 3200 Pa; water tank 60 ml; ultrasonic atomization spraySafety: 9-stage protection system; nylon and latex wire safety rope with a tensile strength of at least 1900N; 3.3 m safety ropeCoverage: Edge cleaning with up to 99.5% coverage; WIN-SLAM 3.0
ECOVACS’ US store lists the WINBOT mini at $239.99. It is corded, with battery life listed as unlimited, and blackout protection keeps it on the window for over 30 minutes while sounding an alarm. ECOVACS lists 7500Pa suction power, suction power while moving of 3200 Pa, ultrasonic atomization spray and a water tank of 60 ml. Edge cleaning reaches up to 99.5% coverage under WIN-SLAM 3.0, and safety is a 9-stage protection system plus a nylon and latex wire safety rope with a tensile strength of at least 1900N.
Go ifSmall windows and tight frames where a slim corded robot fits, with a 30-minute blackout hold and alarm
Skip ifYou can buy the newer mini 2, which costs less here and runs WIN-SLAM 4.0
Why #6 over #7: It scores 50 against 47 for the HOBOT-298 on a 30-minute blackout hold against 20 mins, though the HOBOT-298 costs $199.00.
7
HOBOT-298
Answrs VerdictIt scores 47 on a $199.00 price, a 20 mins backup hold and a 150 Kgf rope, held back by no cordless mode.
Price: $199.00 on HOBOT USA’s online store read on 2026-11-03Spray: Ultrasonic spray nozzle, 108 Khz, nebulizes water to 15 μm mist; 40 ml tank that cleans a 40m2 areaPower-loss hold: Embedded Li-Po battery: 20 minsSafety and grip: Safety rope (150 Kgf); suction force 6.0 Kgs; Nidec brushless motorNoise and weight: 64 dB @1 m; 1280g; AI Technology V3.1
HOBOT USA’s online store lists the HOBOT-298 at $199.00. Its ultrasonic spray nozzle runs at 108 Khz and nebulizes water to 15 μm mist, and the 40 ml tank cleans a 40m2 area. HOBOT lists a suction force of 6.0 Kgs from a Nidec brushless motor, a safety rope rated 150 Kgf and an embedded Li-Po battery of 20 mins to hold the robot after a power loss. It weighs 1280g, runs AI Technology V3.1 and is rated at 64 dB @1 m.
Go ifBuyers on a budget who want ultrasonic mist spraying and a 150 Kgf safety rope for $199.00
Skip ifYou want a hold time longer than 20 mins after a power cut, or app path planning newer than AI Technology V3.1
Why #7 over #8: It scores 47 against 42 for the HOBOT-2S on a lower $199.00 price; the 2S adds a second ultrasonic nozzle.
8
HOBOT-2S
Answrs VerdictIt scores 42 on a 20 mins hold, a 150 Kgf rope and dual ultrasonic nozzles, held back by a $299.00 price and no cordless mode.
Price: $299.00 on HOBOT USA’s online store read on 2026-11-03Spray: Patented dual ultrasonic spray nozzles, 108 Khz, with a 15 μm water particle size; replaceable water tank 2 x 26 mlPower-loss hold: Embedded Li-Po battery: 20 minsSafety and grip: Safety rope (150 Kgf); suction force 6.0 Kgs; Edge-Leakage SensorsNoise and weight: 64 dB @1 m; 1300g; AI Technology V4
HOBOT USA’s online store lists the HOBOT-2S at $299.00. It has patented dual ultrasonic spray nozzles at 108 Khz with a 15 μm water particle size, fed by a replaceable water tank of 2 x 26 ml, and Edge-Leakage Sensors for frameless glass. HOBOT lists a suction force of 6.0 Kgs, a safety rope rated 150 Kgf and an embedded Li-Po battery of 20 mins. It weighs 1300g, runs AI Technology V4 with firmware updates through the HOBOT App, and is rated at 64 dB @1 m.
Go ifPeople who want two ultrasonic nozzles, Edge-Leakage Sensors for frameless glass and app firmware updates
Skip ifYou want the lower price of the HOBOT-298, which lists the same 20 mins hold and 150 Kgf rope
Why #8 over #9: It scores 42 against 32 for the Mamibot W300 on a published $299.00 price, though the W300 has a 215ml tank.
9
Mamibot iGLASSBOT W300
Answrs VerdictIt scores 32 on the largest tank here at 215ml, a 25–30 minutes backup hold and a safety rope, held back by no published price.
Price: Not published on Mamibot’s W300 page read on 2026-11-03Cleaning system: TriAqua spray, wet wiping and squeegee drying in one pass; dual-side 4-nozzle atomized sprayTank: 215ml water tank that cleans approx. 35㎡ per fillSafety: Built-in 650mAh backup battery for 25–30 minutes of emergency holding; high-strength safety rope; four-side physical edge detection sensorsNoise and modes: Operating noise level of ≤70dB; Fast, Deep, Edge, Spot and Manual cleaning modes
Mamibot publishes no price on its iGLASSBOT W300 page. The robot sprays, wet-wipes and squeegee-dries in one pass, using a dual-side 4-nozzle atomized spray, and its 215ml water tank cleans approx. 35㎡ per fill, the largest tank on this list. A built-in 650mAh backup battery gives 25–30 minutes of emergency holding, and Mamibot adds a high-strength safety rope and four-side physical edge detection sensors. Operating noise is listed at ≤70dB, with Fast, Deep, Edge, Spot and Manual cleaning modes and app control.
Go ifTile, mirrors and big panes where a squeegee pass and a 215ml tank mean fewer refills
Skip ifYou need a published price before you buy
Why #9 over #10: It scores 32 against 12 for the Mamibot W120-DP on a stated safety rope and a 215ml tank.
10
Mamibot iGLASSBOT W120-DP
Answrs VerdictIt scores 12, last: a 25 minutes backup hold, but no published price, no cordless mode and no safety rope stated on its page.
Price: Not published on Mamibot’s W120-DP page read on 2026-11-03Suction: 2.5-3.2KPA auto suction-adjustingPower-loss hold: Built-in backup battery provides up to 25 minutes of emergency support during power interruptionsSpray and tank: Dual-directional 4-nozzle motorized spraying; 60ml tank that supports up to 20 sqm wet cleaningSize: 6.9cm ultra-slim body; 1.4kg; for framed and frameless vertical windows
Mamibot publishes no price on its iGLASSBOT W120-DP page. It lists 2.5-3.2KPA auto suction-adjusting, dual-directional 4-nozzle motorized spraying and a 60ml tank that supports up to 20 sqm wet cleaning. A built-in backup battery provides up to 25 minutes of emergency support during power interruptions, with a battery status alert. The body is a 6.9cm ultra-slim design at 1.4kg, and Mamibot says it works on both framed and frameless vertical windows, with app or remote control. The page does not state a safety rope.
Go ifFramed and frameless vertical windows where a slim 6.9cm body and app or remote control help
Skip ifYou need a published price or a stated safety rope
How we ranked these
This list covers robot window cleaners sold on the US stores of ECOVACS and HOBOT, plus two Mamibot models listed on Mamibot’s own site. Each pick was scored out of 100 with the same rubric from the maker’s own product page or store, read on 2026-11-03: cordless battery operation (25 points), automatic pad washing in the station (10), published price (25), a stated power-loss hold time (20), a stated safety rope (10) and a water tank of 80 ml or more (10). A figure the maker does not state scores zero. Scores: ECOVACS WINBOT W2S OMNI seventy-five, W2S PRO OMNI seventy, W3 OMNI sixty, W2 PRO OMNI sixty, WINBOT mini 2 fifty-five, WINBOT mini fifty, HOBOT-298 forty-seven, HOBOT-2S forty-two, Mamibot iGLASSBOT W300 thirty-two and Mamibot iGLASSBOT W120-DP twelve. The W3 OMNI and W2 PRO OMNI tie and the W3 OMNI ranks higher on its longer stated runtime. Best value is the lowest published price among the picks scoring fifty or more. Every figure is vendor-stated, not lab-measured, and suction figures are not compared because makers state them differently (maximum, while moving, kilograms of force). Cleaning results, streaking and measured noise are not scored. An earlier version of this list included the HOBOT-388, AlfaBot X7, Cop Rose X6, ECOVACS WINBOT W1 PRO and Mamibot iGLASSBOT W120-T. We replaced them because HOBOT USA’s store no longer lists the HOBOT-388, ECOVACS’ store shows the W1 PRO as out of stock, and we found no maker product page for the AlfaBot X7, Cop Rose X6 or Mamibot W120-T. Mamibot publishes no price for its two picks. No company paid for or adjusted a position. Prices are those on each maker’s store on the read date and change often. Photos come from each maker’s own site: the ECOVACS and Mamibot W300 photos show the robots on windows, and the HOBOT-298, HOBOT-2S and Mamibot W120-DP photos are the makers’ product images, padded to fit. Facts are taken from each maker's own published information; check the official site before you buy.
Questions people ask
What is the best robot window cleaner in 2027?
The ECOVACS WINBOT W2S OMNI scores 75 out of 100 on our rubric. ECOVACS lists a Cordless Mode for 110 minutes, a power-off protection duration of 30 min, Max. Suction Power 8000 Pa, an 80ml water tank and a TruEdge scrubber, at $407.55 on its US store.
Which robot window cleaner is the best value?
The ECOVACS WINBOT mini 2 at $178.60, the lowest price on this list. ECOVACS lists 8,000Pa suction power, ultrasonic atomization spray, a 10-Tier Protection System and power-off protection that keeps it attached for over 30 minutes. It is corded, with no cordless mode.
What happens if the power goes out while the robot is on the glass?
Every pick here states a backup hold. ECOVACS says the WINBOT mini stays on the window for over 30 minutes while sounding an alarm, HOBOT lists an embedded Li-Po battery of 20 mins on the HOBOT-298, and Mamibot lists 25–30 minutes of emergency holding on the W300. Always clip the safety rope before a run.
Do I need a cordless robot window cleaner?
Only if your windows are far from an outlet. The four ECOVACS OMNI picks run from a battery station: up to 130 minutes on the W3 OMNI and 110 minutes on the W2S OMNI, W2S PRO OMNI and W2 PRO OMNI. The mini models, HOBOT and Mamibot picks run on a power cord.
Published price on the maker’s US store (USD, lower is cheaper) at a glance
ECOVACS WINBOT mini 2178.6 USD (lower is cheaper)
HOBOT-298199 USD (lower is cheaper)
ECOVACS WINBOT mini239.99 USD (lower is cheaper)
HOBOT-2S299 USD (lower is cheaper)
ECOVACS WINBOT W2S OMNI407.55 USD (lower is cheaper)
ECOVACS WINBOT W2S PRO OMNI499 USD (lower is cheaper)
ECOVACS WINBOT W2 PRO OMNI499.99 USD (lower is cheaper)
ECOVACS WINBOT W3 OMNI699.99 USD (lower is cheaper)
Published price on the maker’s US store (USD, lower is cheaper), as published by each maker. Picks without a published figure are left off.
