3i

Who 3i is

3i is a robot cleaning brand from Shenzhen. Its Chinese site describes it as a brand of 深圳市杉川机器人有限公司, "诞生于深圳" (born in Shenzhen), with research engineers making up more than 70% of its development staff ("研发工程师占比超70%"), and says it has been building its floor-cleaning stations and robot vacuums since 2022. The US store is signed 3i, and the Chinese site carries a 3i Tech Inc. copyright line.

What 3i is known for is taking one chore off the owner's list per machine. The G10+ squeezes dust inside the robot so there is no emptying bag. The P10 Ultra reaches its mop out to the baseboard and washes it in hot water. The S10 Ultra recycles its own mop water, which the brand bills as the "World's First WaterRecycle™ Floor Washing Robot Vacuum". Each robot solves a different annoyance, and that is the clearest way to choose between them.

The range: three robots, three ideas

The US store sells exactly three robot vacuums, each shown with a sale price and a higher regular price. Prices move often, so treat these as what the store showed.

G10+, the entry model. Listed at $199.99 against a regular $449.99, the G10+ is the budget machine, described on the collection page as "Patented onboard debris compression, extendable brush and mop, flagship-level LiDAR navigation." Instead of an auto-empty dock, a mechanical paddle inside the robot compresses debris in its bagless 1L dust box. The brand's own blog says that gives "60 days of hands-free cleaning without emptying the bin," adds a UV light inside the bin, and keeps the charging dock small with no disposable parts. The same article lists voice control through Google Assistant and Alexa, an ultrasonic carpet sensor that lifts the flat mop by 10mm (0.4 inches), recognition of 128+ object types and up to 5 stored maps for multi-level homes. The brand's own pages disagree on its suction, so the listing leaves that figure out.

P10 Ultra, the middle step. At $399.99 against a regular $1,099.99, the P10 Ultra is where the full dock arrives. Its product page headline is "18,000 Pa Deep-Cleaning Robot Vacuum with UltraReach™ Mop": two spinning mop pads at 220 RPM, one of which extends up to 1.18 in / 30 mm to clean along edges, then retracts. The station washes the pads with 140℉ / 60℃ hot water and detergent, dries them with hot air, empties the robot into a 3L bag (the page claims "70 days of hands-free cleaning," noting that bag replacement varies by household), collects wastewater, refills the robot's tank and cleans its own base tray. Auto TangleCut™ trims hair off the roller brush with a hidden blade.

S10 Ultra, the flagship. At $699.98 against a regular $1,299.99, the S10 Ultra swaps spinning pads for what the brand calls a "Real-Time Self-Cleaning Roller Mop" and adds WaterRecycle™, which the comparison table calls auto water change, with water purification by "Silver Ion + Carbon Rod". The roller extends up to 1.97 in / 50 mm and spins at 330 RPM. The table lists 13000 Pa of suction, a 2.5L dust bag in the station, dToF LiDAR, 3D structured light plus an AI camera, a 0.98 in / 25 mm crossing height and "Advanced Green Light" for spotting dust.

What the steps buy, then: the G10+ trades a dock for onboard compression and a flat mop; the P10 Ultra adds the most suction in the range, spinning mops and a full hot-water station; the S10 Ultra adds the roller mop and removes the chore of changing mop water.

What the brand publishes about daily use

The P10 Ultra page is the most detailed, and much of it describes the whole 3i approach. Navigation is LDS LiDAR, which "scans rooms in 360° and enables fast path planning, even in complex layouts," backed by dual 3D structured light and an AI camera that recognizes "100+ Objects" such as shoes, socks and pets. Its FAQ gets practical. The robot returns to charge at 10% battery and, with resumable cleaning on, restarts at 30% or 60% depending on what is left. In vac and mop mode it goes back to wash its mops every 15 minutes by default, adjustable from 10 to 30 minutes or after each room, and the station refills its tank in about 8 seconds each time. Drying takes about 3 hours by default, with 2, 3 or 4 hours selectable in the 3i App. It crosses thresholds up to 0.6 inches with mops fitted and 0.8 inches without.

The 3i App covers cleaning schedules, room selection, no-go zones, custom carpet cleaning, 3D mapping, quick mapping, multi-floor maps, room and furniture editing, dust collection and mop-washing settings, drying and TangleCut control, do not disturb, child lock and pet recognition. Cleaning modes are AI auto, vacuum, mop, vac and mop, and custom; suction runs Quiet, Medium, Strong and Max; water level Low, Medium and High. For pet owners the page adds automatic pet photos, pet avoidance, pet zone cleaning and live monitoring from the phone.

On privacy, the P10 Ultra page says its "AI obstacle avoidance* operates without saving any images, safeguarding your home's privacy," and its footnote cites TÜV Rheinland certification and compliance with an ETSI cybersecurity regulation. On consumables, the brand asks owners to use only the cleaning solution supplied by 3i, and the store has its own accessories section. In the box with the P10 Ultra come the robot and base station, 2 mops, a side brush, cleaning solution, a detachable base, the power cord and the manual. Each robot has a user manual, quick start guide and maintenance guide on the support pages.

Support, stores and caveats

Customer service is listed as Monday to Friday, 8:00 to 17:00 CST, at support-us@3itech.com. The footer links an After-Sales Service Policy, a Shipping Policy and a Software Security Support Policy, so the terms are there to read before buying. Every robot also has a "Buy on Amazon" button next to the brand's own store, and the store ships to the United States in USD plus France, Germany, Italy and Spain in euros, with orders shipped only within the chosen country. The home page quotes reviews from Lifehacker, Mashable, Tom's Guide, ZDNET and Vacuum Wars.

The caveats are small. The range is only three robots deep in the US, and the brand's own pages give two different suction figures for the G10+. The station bags and cleaning solution are 3i's own, so a buyer is committing to its consumables. In China the brand sells a separate line of floor-washing stations (F1, H1 Pro+, H1 Master, H1 Pro) and an M1 cat litter box that the US store does not carry.

Who 3i suits

The G10+ suits a small apartment or a first-time buyer who wants mapping and a mop without giving floor space to a tall dock. The P10 Ultra suits a home with long edges, rugs and a pet, where the extending mop, carpet boost and TangleCut earn their keep. The S10 Ultra suits the owner who is tired of topping up and emptying water tanks and will pay for the roller mop and water recycling. Buyers who want a wide choice of models or a large retail footprint have a narrower pick here, but each of the three does something specific and does it in the brand's own way.