robot Vacuum

Best robot vacuum for 2021

No need to pull your upright vacuum, broom and dustbin out of the closet — your robot vacuum will do the dirty work for you. Gone are the days when robot vacuums were only found in Jetsons-like midcentury dream homes or the pages of science fiction. Now they’re real, everyday appliances that can take charge of your…

No need to pull your upright vacuum, broom and dustbin out of the closet — your robot vacuum will do the dirty work for you. Gone are the days when robot vacuums were only found in Jetsons-like midcentury dream homes or the pages of science fiction. Now they’re real, everyday appliances that can take charge of your housekeeping and many boast features like sophisticated sensors, lasers, CPUs and AI-enhanced software

If you don’t want to grab your broom or regular vacuum every time something that needs to be swept up, but you’re having trouble justifying the cost of a robot vacuum to keep your home tidy, know that these machines will pick up even small bits of debris like cat litter and dust bunnies. A robot cleaner is versatile, too: Depending on cleaning mode, they can keep hardwood floors, tile floors, area rugs and carpets spick and span with powerful suction that, in some cases, rival upright vacuums. Even better, if you tuck the charging dock in an out of the way space, you’ll never even have to think about your robot vac — you just have automatic dirt disposal and a clean floor.

As cool as they are, living the robotic vacuum cleaner dream can set you back a hefty sum — some cost as much as four figures. While you don’t have to spend that much on a robotic vac, you do get a lot in return. That includes self-emptying dustbinsmapping multiple rooms and floorplans, powerful suction and thoughtfully designed hardware. That said, robotic cleaner expectations are important and none of these machines can truly replace a mop and human exertion on a hard floor.

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To choose the best robot vacuum, I spent over 120 hours torture-testing a group of 12 robotic cleaning vacuums for things like suction power, their ability to perform on carpets and hard flooring and performance during each cleaning cycle. Among them are brand-new models that have recently launched, flagship models and compelling options offered across numerous online retailers. I excluded older models that likely won’t be sold for much longer. I’ll continue to update this best robot vacuum list periodically as new models become available.

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If someone were to give you a blank check and tell you to buy the best robot vacuum, this is the bot to get. That said, the iRobot Roomba S9 Plus has a whopping price tag: $1,100 (though sometimes it’s discounted). For that staggering pile of cash, this robotic vacuum delivers powerful suction and superb dirt and dust removal. 

On hardwood floors this Roomba picked up an average of 93% of our test sand, the highest amount in our test group, but this Roomba robot vacuum struggled a bit cleaning sand from low-pile carpeting and area rugs, earning a low average dust and sand pickup of 28%. 

That said, the Roomba robot vac removed an average 71% of sand from our medium pile carpet while vacuuming. Again, this Roomba model gave the best result that we saw on this specific test. It also cleaned up more dog hair, pet dander and allergens than any vacuum in this test group, and the bot navigates and maps multiple rooms and floors. iRobot has also updated its app to let you designate “keep out zones” that you want the S9 Plus to avoid when cleaning. The app also lets you use voice commands to immediately clean a room using Alexa or Google Voice Assistant.

The robot zipped through our test room in a short average time of 25 minutes, too. You can link the S9 Plus to the Roomba app and your home Wi-Fi as well. Best of all is the Roomba S9 Plus’ CleanBase docking station. The dock both charges the robot’s battery and empties its dustbin automatically, making cleaning even easier and keeping you from worrying about battery life. Now that’s convenient.

Read our first impressions of the Roomba S9 Plus.

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For less than half the list price of the Roomba S9 Plus, the $600 Neato’s D7 vacuums up dirt, dust and messes almost as well, making it the best robot vacuum at a midrange cost. On average this robotic cleaner picked up a greater amount of sand (36%) across low-pile carpet and rugs than the Roomba did. 

This automatic vacuum cleaner narrowly beat the S9 Plus for cleaning power on hardwood bare floors, too, collecting an average of 95% of the sand we put down. The vac cleaned dirt, dust and sand from midpile rugs less effectively though, notching a pickup average of 47% while cleaning. 

While the Neato can’t match the Roomba’s prowess at removing pet hair or empty its own dust bin, the D7 navigates more efficiently around furniture yet covers more ground thanks to smart robot vacuum built-in lidar laser navigation mapping. You can also control the cleaning robot using the Neato app as a remote control, as well as link it to Amazon Alexa and Google Assistant. The app allows you to designate areas of your home as off-limits to cleaning, too.


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Here’s a robotic vacuum that proves you don’t need to blow your budget to purchase a solid robot vacuum cleaner. Even though the Robovac 11S Max costs just $250 right now, it cleans floors effectively. That’s especially true when cleaning bare hardwood floors. 

This budget robot vacuum managed to remove an average of 71% of our test sand from this type of surface. The bot didn’t work as well cleaning carpets, earning sand-pickup averages of 21% and 27% on low-pile and midpile, respectively. 

And thanks to this vacuum’s basic navigation system, it took well over an hour to negotiate our test room. As far as time goes, that’s a lot. Still, the Eufy used its runtime wisely. The vacuum covered the space well, cleaning up and leaving almost no spots untouched. The Eufy is also self-charging, so no need to worry about battery life or factor that into overall cleaning time. It’s the best robot vacuum for value.

How we test robot vacuums

Our method for evaluating robot vacuums is straightforward, yet grueling. There are two types of tests we run. The first trial is to figure out how well a robot covers the floor while cleaning. We built an industry-standard testing room as specified by the International Electrotechnical Commission, just for this purpose. The IEC is an international standards body responsible for managing robot vacuum testing procedures, among other things, for vacuum manufacturers. 

Obstacles in our test room mimic what robot vacuums run into in the real world.

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Inside this room are objects designed to simulate typical obstacles a robot vac encounters for navigation as it cleans. These obstacles include wall edges, table and chair legs, couches, other furniture and so on, plus bare tile and hardwood floors, as well as carpet. 

Here’s a coverage photo of the iRobot Roomba S9 Plus as it moved through our test room. You can see the Roomba S9 covered the floor well, except for one slight section in the center (left, bottom).

Gianmarco Chumbe/CNET

We mount LED lights to the top of each vacuum cleaner. The dimensions of the lights correspond to the measured nozzle width of each particular robot vacuum we test.

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As robots move through the room while cleaning, a camera overhead captures a long-exposure image of the entire room in low light. That photo will then have a light trail, created by the LEDs, that shows the exact areas where the robot traveled (and its nozzle position) during its runtime. We can also see areas of the floor the vacuum may have missed or gotten stuck.


This is the coverage pattern created by the Neato D7. Its movement through our test room was very orderly, logical and effective.

Gianmarco Chumbe/CNET

You can see the navigation results of all the robot vacuums in our test group in the gallery below.

Some robot vacuums have a better sense of direction than others

See all photos

The second type of test reveals exactly how much physical debris a vacuum is able to pick up off of the floor. To mimic dirt of small particle size, we use a mixture of play-sand and landscaping sand. For bigger particle soil, we use grains of uncooked black rice. Robots then run in straight line mode across three types of flooring (low-pile carpet, medium-pile carpet and hardwood bare floors).

We test robot vacuums on three types of floor surfaces.

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We control for the specific nozzle width of each vacuum, too. We constructed an adjustable tool to soil our test floors. It lets us lay down a strip of precise area of soil to match the nozzle dimensions for every robot. The mass of soil isn’t chosen at random either. We measure a proportional amount that’s related to the flooring material, type of debris, plus each vacuum’s nozzle width.

Our custom-built tool lets us match soil area to a robot vacuum’s nozzle width.

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We conduct three cleaning runs (at minimum) on each floor type. We also perform cleaning tests with sand and rice separately. That comes to at least 18 tests per robot vac. We weigh the robot’s dust bin both before and after each run. From there we can calculate the percentage of debris pickup for every cleaning run and the average amount of soil a machine manages to remove. Additionally we run anecdotal (visual) pet hair tests for each robot, on all three floor types. 

We run robot vacuums in a straight line during the debris pickup tests.

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The chart below shows the fine particle cleaning performance data for all of the robot vacuums we tested. It should give you a pretty good idea about their cleaning performance on different kinds of flooring surfaces including hardwood floors, bare floors, low pile carpet and others. Our rice-based, medium-size particle test didn’t show enough differentiation between each cleaner, which says they can all handle larger particles without trouble. For fur removal for pet owners, we judged anecdotally.

Percent soil removed

iRobot Roomba S9 Plus




Neato D7




Neato D4




Electrolux Pure i9




Neato Botvac D6 Connected




RoboRock S5 Max




Ecovacs Deebot Ozmo 950




Shark IQ 1001AE




iRobot Roomba i7 Plus




Eufy RoboVac 11s Max



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