Verdict: buy the Ecovacs Winbot W2S Omni unless you only have a few flat windows near an outlet. In the Ecovacs Winbot vs Hobot match-up, the Winbot wins on cordless runtime, station and size range. The HOBOT-2S wins on price and on its edge-leakage sensor for frameless glass. Both clean flat glass. Neither cleans your frames, screens or textured panes.
ECOVACS WINBOT W2S Omni
It is the only robot in this match-up that runs 110 minutes without a cord, per Ecovacs, and its station holds the robot to the glass with over 800 N of suction. It handles framed and frameless windows at least 3 mm thick, tilted up to 45 degrees, down to a 30 x 40 cm pane. The trade-off is a higher price class and a 1.95 kg robot you still have to tether.
Check price on Amazon →This comparison uses the manufacturers' own spec pages and Amazon.com listings, not a bench test of our own. If you have been burned by robot hype, the useful question is not which is smarter. It is which one will hang on your actual window, with your actual outlet, without a fall risk.
Winner for most homes: ECOVACS WINBOT W2S Omni (110 minutes cordless, framed and frameless glass at least 3 mm thick). Winner on price: HOBOT-2S, a plug-in robot with a 5 m cord, a 4.5 m tether and a 20-minute backup battery. Skip both if your glass is textured, curved or out of safe reach. Always clip the tether.
Quick comparison
| Product | Best for | Key detail | Price class | |
|---|---|---|---|---|
| Top pick ECOVACS WINBOT W2S Omni | Cordless cleaning of mixed framed and frameless windows | 1.95 kg robot, 110 min runtime, up to 8,000 Pa, 30 x 40 cm minimum window | $$ · Mid-range | Check price |
| HOBOT-2S | Budget buyers with flat glass near an outlet | 5 m cord, 4.5 m tether rated 200 kg pull, 20 min backup battery, 12 cm/s | $$ · Mid-range | Check price |
| ECOVACS WINBOT W2S | Plug-in Ecovacs without the station | Corded, battery only for brief power interruptions, same 3 mm glass minimum | $$ · Mid-range | Check price |
| ECOVACS WINBOT W3 Omni | Big houses and tall glass runs | Up to 130 min, 3,300 Pa moving, 10 kg station | $$$ · Premium | Check price |
| HOBOT S7 Pro | Large indoor glass; US stock looks inconsistent, so check live availability | 4,800 Pa, 4 m cord extendable to 8 m, 4.5 m tether rated 230 kgf | $$ · Mid-range | Check price |
Our picks, one by one
ECOVACS WINBOT W2S OmniWinner Overall
Ecovacs lists a 270 x 270 x 76 mm robot, 3,000 Pa suction while moving and 8,000 Pa maximum, with about 65 m² in Fast Mode and about 26 m² in Deep Mode per charge. Its main cable is rated to 100 kg, and there is a 1 m backup rope on the station. The page lists a runtime of 110 minutes, plus or minus 10 percent. Against the HOBOT-2S, the big difference is that you do not need to plug in at the window.
Check price on Amazon →HOBOT-2SBest Value Plug-In
Hobot lists a 5 m power cord, a 4.5 m safety rope rated for 200 kg of pulling force and a 20-minute backup battery with an audio alert. The robot travels at 12 cm per second and covers 1 m² in about 2.4 minutes. Its edge-leakage sensor detects air leaks at the edge of frameless glass. Compared with the Winbot, it gives up cordless running but keeps a shorter learning curve: you plug it in, stick it on and clip the tether. Hobot's page does not publish the robot's weight or a numeric suction rating, and third-party listings disagree on both, so we did not use either.
Check price on Amazon →ECOVACS WINBOT W2SPlug-In Ecovacs
The W2S shares Ecovacs's navigation and 3 mm glass minimum with the W2S Omni but drops the station. For most buyers, that makes it a harder sell than either the HOBOT-2S on price or the W2S Omni on features. It makes sense only if you find it on sale and your windows all sit near an outlet.
Check price on Amazon →ECOVACS WINBOT W3 OmniPremium Winbot
Ecovacs lists up to 130 minutes of cleaning per charge, 3,300 Pa suction while moving, a 10 kg station and a three-layer cable rated to 100 kg with a 1 m backup rope at the base. The Ecovacs line page says W3 edge cleaning reaches within 1.1 mm of the frame. The extra runtime matters only if you have a lot of glass; for a normal house, the W2S Omni covers the job.
Check price on Amazon →Head-to-Head Specs
| Spec | Winbot W2S Omni | HOBOT-2S |
|---|---|---|
| Power | Cordless 110 min from station | Corded, 5 m cord |
| Backup if power fails | Over 30 min attached (Ecovacs line page) | 20 min, with alert |
| Safety rope | Main cable rated to 100 kg plus 1 m backup rope | 4.5 m, rated 200 kg pull |
| Speed | About 1.7 min per m² (Fast) | About 2.4 min per m² |
| Robot weight | 1.95 kg | Not published by Hobot |
| Glass minimum | 3 mm | Not stated numerically |
| Frameless | Yes | Edge-leakage sensor |
Where Hobot publishes no number, we left it blank rather than guess from a retailer.
How We Chose
This is desk research. The inputs were the manufacturer pages for Ecovacs and Hobot, confirmed a live Amazon.com listing for each robot we list, and favored numbers the maker publishes over numbers from third-party spec sites, which conflicted on the HOBOT-2S weight and suction. Criteria: runtime, cord, tether strength, glass limits, cleaning speed, and what owners say about missed edges and cords.
The Math: Time per Window and Cost of the Cord
We turned the stated speeds into minutes for one 1.8 m² window (about 4 ft x 5 ft).
| Robot | Minutes per m² | Minutes for one 1.8 m² window | Windows in 110 min |
|---|---|---|---|
| WINBOT W2S Omni (Fast) | 1.7 | 3.1 | 35 |
| WINBOT W2S Omni (Deep) | 4.2 | 7.6 | 14 |
| HOBOT-2S | 2.4 | 4.3 | 25 |
Formula: minutes per window = minutes per m² x 1.8; windows = 110 / minutes per window. Winbot figures come from 110 min covering about 65 m² (Fast) or 26 m² (Deep); Hobot from its stated 2.4 min per m². Hobot is corded, so the 110-minute row only shows equal-time output.
Takeaway: the Winbot is about 40 percent faster in Fast Mode, but only if your glass is clean enough that Fast Mode does the job.
Three Houses, Three Answers
A ranch house with sliders and a sunroom. Most of the glass is on the ground floor, the patio has an outlet, and you can reach every pane. The HOBOT-2S is enough here. Its 5 m cord reaches a typical slider from an outdoor outlet, and the 12 cm per second travel speed means a 1.8 m² pane takes roughly four minutes. The Winbot would work too, but you would be paying for cordless freedom you do not need.
A two-story colonial with 14 double-hung windows. This house is the hard case for both robots. Double-hung sashes have a meeting rail across the middle and often a screen on the outside, so the robot has to clear a frame edge. Ecovacs states frames must be under 2 mm and obstacles under 4 mm, which many sash rails exceed. Check your own rails with a ruler before you spend. If the glass is flat and the rail is thin, the W2S Omni is the better choice, because you can run it from a ladder-free interior reach without dragging a cord across a lawn.
A modern house with floor-to-ceiling glass. Big panes are where robots earn their price. Ecovacs's line page says its robots handle windows up to 8 m wide by 2.5 m high, and the W3 Omni lists up to 130 minutes per charge. If your glass is frameless and you want that, check the W3 Omni's frameless support with Ecovacs before buying, since its spec table does not say.
Noise, Pads and Day-to-Day Use
Ecovacs lists a noise level as low as 63 dB on the W2 Omni family and 68 dB marketing copy on the W2S Omni page, which is roughly conversation volume. Hobot's text pages give no decibel rating for the 2S, so do not assume it is quieter. If you work from home, run either robot on the windows you are not sitting next to.
Both brands use cloth pads that you wash and reuse. Ecovacs sells washable pads separately, and both makers publish a cleaning solution or spray system. Wash the pads after each session so grit does not scratch the glass. Neither maker promises a pad life in months, so we do not either.
Day to day, the real difference is handling. The Winbot's station is a box you carry, set down and connect. The Hobot has fewer parts: robot, cord, rope. Some owners prefer that simplicity. Others dislike the cord dragging across a sill. Ask yourself which annoyance you can live with, because you will do this chore more often if it is easy.
What Neither Robot Can Do
Neither clears stuck-on grime, wipes frames or sills, or works on a pane with raised grilles. Ecovacs says glass should be smooth, free of oil and condensation, with obstacles under 4 mm and frames under 2 mm. Hobot's Amazon listing warns against rounded-edge frames. Both robots need you to stay below with the tether in view.
- Textured and patterned privacy glass is out.
- Cracked, loose or leaded glass is out.
- Screens and storm windows must come off or the robot cannot reach the pane.
Safety Rules for Either Robot
Clip the tether to a solid anchor every time. Never lean out of a window to place the robot. Keep people and pets away from below during a run. Follow the maker's frame and glass limits. For second-story glass you cannot reach safely, hire a professional.
Measure Before You Order: A Five-Minute Checklist
Most returns come from windows that do not fit the robot, not from robots that fail. Spend five minutes with a tape measure first.
- Pane size. Ecovacs lists 30 x 40 cm as the smallest window for the W2S Omni and 22 x 25 cm for the mini. Amazon's Hobot listing gives 15 x 15 inches (about 38 x 38 cm). Measure the clear glass, not the sash.
- Glass thickness. Ecovacs lists a 3 mm minimum. Thin single-pane glass in older houses can be close to that, so check a corner edge.
- Frame depth. Ecovacs says frames should be under 2 mm and obstacles under 4 mm. Run a ruler across the frame.
- Glass type. Flat and smooth only. Run a fingernail across it: if you feel pattern or ripple, skip it.
- Outlet distance. For the HOBOT-2S, measure from the outlet to the farthest pane. The cord is 5 m, and it has to reach without pulling the robot.
- Tether anchor. Find a solid anchor point for the rope: a fixed handle, a frame member or a ladder rated for the load. If you cannot find one, you cannot use the robot safely on that window.
If three or more of your windows fail this list, you have your answer, and it is neither robot.
Who Should NOT Buy Either
Skip both if you have mostly small divided-light panes, heavily textured glass, or windows where the nearest outlet is more than 5 m away and you do not want a station model. If you only wash windows once a year, a squeegee and a pro for the high ones cost less hassle.
Our Decision Rule
Count outlets and count windows. Under about 10 flat panes within reach of a socket: the HOBOT-2S. More glass, exterior runs or any tall window: the W2S Omni. Huge houses with floor-to-ceiling runs: the W3 Omni. When in doubt, buy the cordless one.
One more filter: how much you value your time. A robot that does 12 windows in about 37 to 52 minutes (see the table above) saves you the ladder, the bucket and the squeegee, but not the prep. If you wash windows twice a year, the saving is small. If you want glass clean every month, it adds up.
Our #1 pick: ECOVACS WINBOT W2S Omni
If you only read one line of this guide: this is the one we would buy.
Check price on Amazon →Frequently asked questions
Is Ecovacs Winbot better than Hobot?
For most homes, yes. The Winbot W2S Omni runs cordless for about 110 minutes and states a 3 mm glass minimum. Hobot is cheaper and has an edge-leakage sensor, but the HOBOT-2S needs a cord.
Do Hobot window robots work on frameless windows?
Hobot says the HOBOT-2S has an edge-leakage sensor that detects air leaks at frameless edges. It gives no numeric glass limits on its page, so check the manual and your glass first.
How long is the safety rope on a Hobot?
Hobot's page lists a 4.5 m rope rated for 200 kg of pulling force on the 2S. Ecovacs rates the Winbot main cable at 100 kg with a 1 m backup rope.
Can I use a window robot on a second-story window?
Only if you can reach the window safely from inside and clip the tether to a solid anchor. Never lean out to place the robot. Hire a pro for hard-to-reach glass.
Can a Winbot or Hobot clean both sides of a window?
They clean the side they stick to. You run the robot on the inside and again on the outside if you can reach it safely. Between-pane glass in double-glazed units is not reachable by either robot.
Price classes are a rough guide; check the current price on Amazon. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.