Garden Last updated · owner ratings verified July 2026
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Side by side
| Our pick Shark Shark PowerDetect Self-Empty Robot Best overall $500–650 Check price | Shark Shark AV2501AE AI Robot with XL Self-Empty Base Best value $300–400 Check price | Shark Shark AV2501S AI Ultra with Matrix Clean Most thorough passes $350–450 Check price | iRobot iRobot Roomba j7 Best obstacle avoidance $400–550 Check price | iRobot iRobot Roomba Vac (Q0120) Cheapest entry $180–250 Check price | |
|---|---|---|---|---|---|
| What owners rate it | |||||
| Owner rating | 4.2 / 5 (3,647) | 4.1 / 5 (17,852) | 4 / 5 (23,480) | 3.9 / 5 (2,483) | 3.4 / 5 (3,106) |
| Specifications | |||||
| Navigation | LiDAR mapping | LiDAR mapping | LiDAR mapping | Camera and sensors, no LiDAR | Basic sensor navigation |
| Cleaning intelligence | Floor-type and dirt detection | Fixed suction modes | Matrix Clean overlapping passes | Dirt Detect sensors | Dirt Detect sensors |
| Brush design | Self-cleaning brushroll | Self-cleaning brushroll | Self-cleaning brushroll | Rubber dual extractors | Rubber dual extractors |
| Mopping | Light mopping pass | None | None | None | None |
| Dock | Self-empty base, multi-week capacity | XL self-empty base, 60-day capacity claim | Self-empty base, 30-day capacity claim | Charging dock only | Charging dock only |
| Obstacle handling | Sensor-based, no object recognition | Sensor-based, no object recognition | Sensor-based, no object recognition | PrecisionVision object recognition | Bump and cliff sensors only |
| App and mapping | SharkClean, room mapping and no-go zones | SharkClean, room mapping and no-go zones | SharkClean, room mapping and no-go zones | iRobot Home, room labels and Keep Out Zones | iRobot Home, limited mapping |
| Who it suits | |||||
| Best for | Hard floors with a shedding pet | A self-emptying robot without the flagship price | Fine dust and grit on hard floors | Homes where the floor is never fully clear | A small hardwood apartment, first robot |
Ratings are aggregated Amazon owner ratings, not our own testing. Figures verified July 2026.
Pros and cons
Shark PowerDetect Self-Empty Robot
- Detects dirtier areas and floor type and steps up power automatically instead of running one setting everywhere
- NeverStuck castors climb thresholds and rug edges that strand lower-slung robots
- The best-rated robot of the six models in this comparison
- Self-emptying base holds weeks of debris, which is what turns a robot into an appliance you forget about
- Large base that needs a permanent spot with clearance either side
- Mopping is a light pass rather than genuine scrubbing
- A newer listing, so the owner-rating base is smaller than the long-running Shark AI models
Shark AV2501AE AI Robot with XL Self-Empty Base
- Self-emptying at a price where most rivals still hand you a bin to empty daily
- The self-cleaning brushroll is the single most useful feature Shark puts in a robot for pet households
- Very large owner-rating base, so the long-term record is well established
- LiDAR mapping with room-by-room control in the app
- No object recognition, so cables and socks stop runs
- Owners report the bin sensor and dock alignment as the recurring failure points
- Mopping is not part of this machine at all
Shark AV2501S AI Ultra with Matrix Clean
- Matrix Clean runs an overlapping grid rather than single passes, which is measurably better on fine dust in hard-floor corners
- Self-cleaning brushroll handles long hair without a monthly scissors session
- Among the most-rated robot vacuums on the market, so the owner record is deep
- Matrix passes take considerably longer to finish a floor
- No object recognition and no mopping
- Owners report app and dock connectivity as the most common complaints
iRobot Roomba j7
- PrecisionVision identifies cords, socks and solid pet waste and drives around them, backed by iRobot on the pet-waste claim
- Rubber dual extractors rather than bristles, which is the better design for hair on hard floors
- The most mature app in the category and the best parts network of any robot brand
- Low profile fits under furniture that taller mapping robots cannot enter
- Camera navigation prefers a lit room, so overnight runs map less reliably
- No self-emptying base at this price, unlike both Shark models here
- Owner ratings across recent Roomba listings sit below Shark in this comparison
iRobot Roomba Vac (Q0120)
- The least expensive way onto the Roomba platform
- Simple to set up and run with no mapping configuration
- Slim enough to get under low sofas and beds
- No mapping, no object recognition and no self-empty base
- Rated poorly by owners for its price, mainly over coverage and repeat passes
- Small bin, which on hardwood with a pet means emptying daily
Decision factors
What you actually pay
Shark undercuts iRobot at every step of the ladder, and it does it while including more hardware. A Shark AI robot with a self-emptying base sits at $300 to $400. A Roomba j7 with no dock at all is $400 to $550. The Shark PowerDetect flagship at $500 to $650 is still cheaper than iRobot's self-emptying flagship, and it adds floor-type detection on top.
What iRobot's premium buys is the camera and the software behind it — object recognition trained on the things people leave on floors — plus a service and parts network no competitor matches. Whether that is worth $150 or more depends entirely on how tidy the floors are before the robot starts.
Running costs are close and neither brand is expensive to keep. Filters go two or three times a year, side brushes about as often, and a main brushroll roughly annually. Any self-emptying dock consumes bags — Shark and iRobot both sell them and third-party equivalents exist for both — which over ten years adds up to more than most buyers expect. Budget $50 to $100 a year in parts either way.
The long-term item is the battery. Both brands sell replacements, both are swappable with a screwdriver, and on a cheap robot the battery costs a meaningful fraction of the machine. This is the strongest practical argument for iRobot: parts for old Roombas stay available for years, which is not guaranteed anywhere else in the category.
Which one fits you
- Hardwood throughout with a shedding cat or dog Shark PowerDetect Self-Empty Robot Self-cleaning brushroll plus a base that swallows weeks of hair means the machine runs for a month without you touching it.
- A puppy, or toys and cables that live on the floor iRobot Roomba j7 The only machine here that identifies and avoids solid pet waste, which is the difference between a bad run and a ruined afternoon.
- Fine dust and grit that a single pass keeps missing Shark AV2501S AI Ultra Matrix Clean runs an overlapping grid instead of straight lines. It is slower, and on hard floors it is noticeably more thorough.
- A small apartment and the lowest possible price iRobot Roomba Vac Cheapest route onto a well-supported platform, as long as you accept hand-emptying and wandering coverage.
If neither is right
- roborock Q Revo Neither brand here mops properly. If hard floors need washing as well as vacuuming, the Q Revo spins its pads and washes them at the dock, which is a different class of clean.
- eufy X10 Pro Omni Obstacle avoidance and self-washing mops in one machine, with a much larger owner-rating base than either brand in this table.
- eufy BoostIQ RoboVac 11S Slim No app, no mapping, no dock — just a very slim, very cheap, very well-rated vacuum for low furniture and small floor plans.
Which one should you buy?
Buy the Shark. On hardwood, the two features that determine whether a robot stays in service are a brushroll that does not wrap with hair and a dock that empties itself — and Shark includes both at prices where iRobot includes neither. The Roomba j7 is the right answer in one specific case: a home with a dog, or with cables and toys that live on the floor, where object recognition prevents the runs that end badly.
That is the whole comparison in two sentences, but the reasoning behind it is worth having, because the two brands have made genuinely different bets about what a robot vacuum should be good at.
How do the two brands actually differ?
iRobot builds software-first machines. A Roomba's camera and the recognition model behind it are the product; the vacuum hardware is deliberately conservative — rubber extractors, modest bins, no published suction figure. The bet is that a robot which never gets stuck or wrapped around a cable cleans more than a more powerful robot that fails a run.
Shark builds hardware-first machines. Self-cleaning brushrolls, big self-emptying bases, floor-type detection, overlapping Matrix passes and castors designed to climb thresholds. The bet is that most floors are reasonably clear and what owners actually want is a machine that handles hair and empties itself.
On hard floors, Shark's bet pays off more often. Hardwood shows hair and fine dust more than carpet does, and it is usually the tidier part of a house. Where iRobot's bet pays off is in a family home with a dog, where the failure modes it prevents are the expensive ones.
Which brand handles pet hair better?
Both have solved it, differently. iRobot's counter-rotating rubber extractors grip hair and pull it into the bin instead of letting it wind onto bristles, and they have been refined over many generations. Shark's answer is a brushroll with a comb built into the housing that strips hair off as it turns, which is the same idea it uses on its uprights and which owners consistently rate as the feature they would not give up.
The practical difference is what happens next. Hair goes into a small onboard bin either way, and on a Shark with a self-emptying base that bin gets dealt with automatically. On a Roomba j7 you empty it by hand, most likely daily in a shedding household. That is the real pet-hair verdict and it favors Shark.
How well does each brand navigate a hard-floor house?
Shark's LiDAR machines map a floor plan on the first run by measuring distance in every direction, and they run in the dark exactly as well as in daylight. Rooms get labeled, no-go zones work, and coverage on open hard floors is orderly. The AI Ultra's Matrix Clean adds an overlapping grid that is slower and noticeably better at fine dust, which is the thing hard floors accumulate.
iRobot's camera navigation is good but conditional: it wants light, and it builds its map over several runs rather than in one. In exchange it sees objects, which LiDAR cannot. On a lit, tidy hardwood floor both approaches work. In a dark house at 2am, Shark is the more reliable mapper; on a floor with a phone charger across it, iRobot is the one that finishes the run.
What about repairs and how long these last?
iRobot has the strongest position in the category on parts and service. Filters, brushes, batteries and wheel modules stay available for old models, there is a US service operation behind them, and the third-party market is enormous. If you intend to keep a robot for five or more years, that matters.
Shark is good rather than exceptional here — filters, brushrolls, side brushes and dock bags are readily available, and its five-year appliance reputation carries over. The most common owner complaints on both brands are dock and connectivity issues rather than mechanical failures, which is worth knowing: these machines usually annoy you before they break.
Should you buy either, or something that mops?
Worth saying plainly: neither brand in this comparison mops properly. Shark's PowerDetect makes a light pass and iRobot separates mopping into its Braava line. On a hardwood floor plan where washing matters as much as vacuuming, a robot with spinning pads and a self-washing dock is a different class of machine, and our robot vacuum and mop combo picks cover that field.
For the ranked field on hard floors, see our best robot vacuum for hardwood floors roundup, the Roomba j7 review and the Shark PowerDetect review. Every ranking here comes from aggregated owner ratings, published specifications and expert consensus rather than first-hand trials — the method is at how we rank.