A robot mower earns its keep by working when you are not watching, often at dawn or dusk. That is also when a neighbor is most likely to hear it. So the noise figure matters more here than for a mower you push yourself for twenty minutes.
We read the product pages, spec tables and manuals for eighteen robot mowers from eight brands. The published figures run from 55 dB to 65. Here is why they cannot be ranked straight down the list, and which mowers we would buy.
Our 7 picks are listed above, with full specifications for each.
One brand says what it measured, and it changes everything
ECOVACS prints two figures for the same mower. Its GOAT O1000 is listed at 57 dB(A) in its spec table, and its manual gives that as sound power, alongside a sound pressure figure of 49 dB(A). The same 8 dB gap shows up across its range: 60 and 52, then 62 and 54.
No other maker here says which kind of figure it publishes. Sunseeker's 55dB, eufy's 56dB, Worx's 59 dB and Dreame's 62.8dB are all bare numbers. Husqvarna labels its row "Sound level perceived", a phrase it does not define anywhere we could find.
So the ranking you would get by sorting the numbers is not trustworthy. A maker quoting sound pressure will always look quieter than one quoting sound power, for the same machine. We put the ECOVACS models first because their figures can be interpreted, and we say plainly what everyone else leaves out. For the full explanation, see why you cannot compare dB ratings across brands.
One maker does footnote its conditions: Segway says its figure was "Measured under laboratory no-load conditions", meaning the mower was not cutting grass. That is honest, and it also tells you the real figure on a lawn is higher.
Wire, antenna or camera
How a mower finds its way decides how much work you do before it ever cuts.
- Boundary wire. You peg or bury a wire around the lawn. Husqvarna's 435X AWD still works this way, as does the Worx Landroid L.
- RTK with an antenna. A satellite antenna on a pole gives centimetre accuracy. ECOVACS' A2500 needs one nearly four feet tall, which needs open sky.
- Camera or LiDAR, no antenna. eufy's E15 uses cameras alone. Segway's H210 combines LiDAR, RTK and vision. ECOVACS' A3000 uses dual LiDAR with no antenna at all.
Wire-free setups are easier, but they depend on what they can see. A garden under heavy tree cover suits LiDAR or a wire better than plain RTK.
Match the mower to the slope, twice
Most makers publish two slope figures, and buyers often read only the first.
- Inside the lawn: Dreame claims 80%, Segway's X330 50%, ECOVACS 45 to 50%, eufy 18 degrees.
- At the boundary: Segway allows 25% against 50% inside. ECOVACS allows 17% at a virtual boundary against 45% inside.
If your lawn falls away at the edges, the boundary figure is the one that decides whether the mower can work there at all.
Night mowing, and when it is blocked
ECOVACS' manual states that its GOAT mowers stop mowing at night to protect nocturnal animals, and that you can turn that off in the app. That is the only maker-imposed restriction we found in this set.
Your town may impose its own. Quiet hours ordinances commonly cover powered garden equipment, and a mower that runs at 6 a.m. is exactly the sort of thing they exist for. Check before you set a schedule.
Setting one up so it stays quiet
Give the base station flat, clear ground. ECOVACS asks for open, flat lawn with no slope or rock and nothing obstructing it.
Keep the blades sharp. Blunt blades make the motor work harder. Blades are the main consumable on every model here.
Use the narrowest passage figure. ECOVACS publishes 2.3 ft for the O1000 and 2.62 ft for the A2500. A mower squeezing through a gap tighter than that will bump and reverse repeatedly, which is both slower and louder.
Mistakes buyers make
Sorting the decibel figures and buying the lowest. Only ECOVACS tells you what its number means.
Ignoring the boundary slope figure. It is often half the in-lawn figure.
Assuming wire-free means no setup. RTK needs open sky; cameras need clear boundaries.
Forgetting the subscription. Segway's Connect+ renews at $32.90 a year after the free period.
Buying for the lawn you have today. Coverage figures are rated areas, and makers state them with tolerances.
How we chose
We read each maker's US product page, spec table and, where available, the owner's manual and warranty information. We recorded every noise figure in the maker's own words, and noted whether it was labelled sound power, sound pressure or nothing at all. We compared coverage, navigation, slope limits, cutting width and height, battery and run time, and warranty, and recorded the price and any sale price on the maker's own site.
We did not measure anything ourselves. We ranked first on figures whose basis is published, then on figures with a stated test condition, and last on bare numbers. Where a spec table loaded only through scripts, we left the value out rather than guess. Greenworks publishes no figure at all, and EGO sells no robot mower in the US, so neither appears here.
New to the units? Read dBA explained. To decide what figure to aim for, see how quiet is quiet enough, room by room. For the outdoor tools you push yourself, see the quietest leaf blowers.
