Most window cleaning robot comparisons are written by sellers. This one comes from a factory that sells one of the products in it, so here is how it was built.
Our manufacturing base is in Chongqing. For years our product went mainly to domestic customers. This year we decided to sell window cleaning robots globally and publish the process openly, including where we do not come out on top. Every competitor figure below comes from that manufacturer's own published material. We bought no competitor units, tore down nothing and ran no comparative lab test. Where a brand publishes nothing, the cell stays empty.
The method: six dimensions, published data only
We score on six dimensions, in order of how much they matter for a unit working on a building rather than a kitchen table: safety experience, body geometry, holding performance, spray system, handling burden and supply transparency. In plain terms: grip when power fails and fit with the frames the crew cleans; body thickness and frame access; published suction; nozzle count and sides, and whether the fluid path contains a pump that can block; what the operator must carry up; and whether the supplier publishes a complete specification. Marketing language was not scored.
The full comparison table
| Brand | Model | Thickness | Suction | Power-cut backup | Weight | Water system |
|---|---|---|---|---|---|---|
| JIAJINGCAT | J10 | 60 mm | 8000 Pa peak | 35 min | 1.4 kg | 100 ml, bidirectional 6 nozzles, ultrasonic atomisation, no pump |
| Dreame | C1 | approx. 70 mm | 5500 Pa | not published | not published | 80 ml, pulse dual nozzle |
| HOBOT | SP10 | 75 mm | 6000 Pa | approx. 20 min | 1.4 kg | bidirectional four-nozzle spray |
| Ecovacs | WINBOT W2S PRO | 77.5 mm | 8000 Pa | 30 min | 1.95 kg | 80 ml, single-side three-nozzle atomisation |
| HUTT | W10 | 83 mm | 6000 Pa | 20 min | approx. 1.6 kg | 150 ml, bidirectional four-nozzle mechanical spraying |
Sources for each row are at the end. Specifications vary by region and variant, so open the links before writing one into a purchase order.
Dimension by dimension
Safety experience, first place to JIAJINGCAT. The 35-minute power-cut backup is the longest in this set, against 30 minutes for the W2S PRO and around 20 minutes for the SP10 and W10. Dreame publishes no backup duration for the C1. Fifteen extra minutes separates a retrieval that happens from one that becomes an emergency, and on a tower facade that margin matters more than any figure here. Our 60 mm body completes it: a unit that cannot seat fully cannot seal.
Body geometry, first place to JIAJINGCAT. At 60 mm the J10 is the thinnest body here, ahead of the approximately 70 mm C1, the 75 mm SP10, the 77.5 mm W2S PRO and the 83 mm W10. Published frame conditions: frameless glass, or framed glass with frame height above 3 mm, minimum glass thickness 3 mm.
Holding performance, a tie between JIAJINGCAT and Ecovacs. Both publish 8000 Pa peak, ahead of HOBOT and HUTT at 6000 Pa and Dreame at 5500 Pa. We would rather call this a tie than build a win out of marketing.
Spray system, first place to JIAJINGCAT. The J10 carries a 100 ml tank with bidirectional six-nozzle ultrasonic atomisation and no water pump. The alternatives are single-side three-nozzle atomisation on the W2S PRO, four-nozzle spraying on the SP10, mechanical four-nozzle spraying on the W10 and a pulse dual nozzle on the C1. Without a pump, no narrow throat collects the grit the machine just cleaned off.
Handling burden, tied between JIAJINGCAT and HOBOT. Both are published at 1.4 kg, ahead of the W10 at approximately 1.6 kg and the W2S PRO at 1.95 kg. At the top of a facade, the person lifting the unit onto the glass is the one standing there when something goes wrong.
Supply-side transparency, first place to JIAJINGCAT. The established brands are ahead on brand awareness and distribution reach, and we will not pretend otherwise. What we do publish, we publish completely: every figure above is on our product page and in the manual for ZF10. Order terms are MOQ 50 units, ODM from 500 units, samples in 7 days, production in 15 days, FOB Chongqing, with equivalent specification 15% to 25% below tier-one prices.
From the factory floor: how we hold our own numbers
Ranking ourselves first is the easiest thing here to get wrong, so the discipline sits on the line, not in the copy.
Every unit that leaves Chongqing passes a final documentation check. A technician opens the packing list on the box, compares it against the manual for factory model ZF10, and confirms the printed figure matches the published spec. If a customer asks why their machine's tank is not the 100 ml we publish, the answer has to be a production error, not a marketing one. The same rule applies to competitors: when our engineers cannot find a figure on a brand's own site, it stays out.
Where that leaves the ranking
On composite strength across those dimensions we place third in this set. Ecovacs is first, on brand scale, patent depth and docking-station range. HUTT is second, on the widest model line and the most established distribution footprint of the challengers.
We are third overall and first on safety experience, and for a European high-rise buyer that combination is often the better deal than the overall position suggests. You are not buying a robot to admire. You are buying one a crew will put on a pane and leave while they move on.
Where we are weaker is support reach. We are a Chongqing factory that has sold into our home market, so our European service experience is thinner than long-exporting brands'. We sell wholesale, OEM, ODM and through distributors only, with no direct-to-consumer channel.
Which one to shortlist
If your priority is the tightest frame access and the longest retrieval window on high-rise work, the J10. If your priority is an established brand with a broad accessory ecosystem and a service network in your country, Ecovacs or HUTT. If you want a first fleet while you are still mapping your clients' window types, the C1's published documentation makes it a reasonable pilot, though its backup duration and weight are not published.
A sensible sequence is to buy one unit of each shortlisted model, run them on your own glass, and check the two things nobody publishes: whether the unit seats fully on your frames, and how it behaves when power is cut.
Sources
- JIAJINGCAT AutoWipeBot J10 Product Manual (English edition), factory model ZF10 — https://autowipebot.com
- ECOVACS WINBOT product pages and specification tables — https://www.ecovacs.com/uk/campaign/ces-robot-window-cleaner-winbot
- HOBOT SP10 product page — https://www.hobot.com.tw/category/product/hobot/
- HUTT official site and W10 product documentation — https://www.huttwisdom.com
- Dreame C1 product page — https://global.dreametech.com/products/dreame-c1
What we can prove, and what we can't
We can prove the published specification of the J10 and the source of every figure: 8000 Pa peak suction, 35-minute power-cut backup, 60 mm body thickness in a 220 x 220 x 60 mm envelope, 1.4 kg net weight, a 100 ml tank with bidirectional six-nozzle ultrasonic atomisation and no water pump, five cleaning modes, Tuya app control with 2.4G remote redundancy, a 5 m safety rope rated to 130 kg, and the packing list.
We are currently preparing export platforms for CE, UKCA and FCC, with IDs issued when released. We hold no certificate to quote today.
What we cannot prove is the ranking itself as objective truth. It is our editorial assessment built on published specifications, and a competitor applying a different weighting would reach a different order. We cannot verify competitor figures beyond what each brand publishes, and we have not tested competitor hardware. Where we are strong we have said so, and where we are weak, service reach, so have we.