I have a husky and a lab, and together they shed roughly one extra dog per week. That is the floor these four self-emptying robot vacuums are being judged against: hardwood in the living areas, tile in the kitchen, low-pile carpet in the bedrooms, phone cords and rug transitions left exactly where they fall. I have been running robot vacuums for about four years and I am on my third one. My first was a cheap random-navigation bot that wedged itself under the sofa table on every single run, and I finished rooms by driving it around with my phone like an RC car. That is why I care about navigation more than suction numbers, and why I would rather compare four models carefully than buy whichever box shouts the loudest.
A robot vacuum is a maintenance tool, not a replacement for your real vacuum. Say that out loud before you spend anything. What a self-emptying robot vacuum actually buys you is frequency: a floor that gets touched every day instead of every Saturday. What it does not buy you is a deep clean, and no dock on this list changes that. The dock just means you are not emptying a bin every other day.
The best pick for most people here is the Shark PowerDetect AV2820S, because it lands in the middle of this group and still gives you a real self-empty dock without the iRobot or roborock premium. If mapping and app polish matter more than money, the roborock Qrevo Edge 2 is the one I would point you at. The T20+ is the budget entry, and the iRobot Roomba 705X is the one to buy when you want the least troubleshooting and you are willing to pay for it.
iRobot Roomba 705X Robot Vacuum & Mop Combo
AI obstacle avoidance and a multifunction dock that hot washes and dries the mop; the least fiddly ownership experience in this group
The most expensive of the four, and you are paying a brand premium for cleaning that is good rather than remarkable
Shark PowerDetect Self-Empty Robot Vacuum, Black, AV2820S
The value seat in this group: a genuine self-empty dock and a brand that has been building these for years, without the top-tier price
Sold as a vacuum first, so no mop in the name, and the mapping approach is not spelled out the way roborock spells out suction
roborock Qrevo Edge 2 Robot Vacuum and Mop, 25,000Pa, 3.14'' Ultra-Slim
The 25,000Pa figure plus a 3.14 inch ultra-slim body, which is the combination that reaches under low furniture and still has power
Premium money, and the dock is still a dock: bags and filters need attention either way
T20+ Robot Vacuum and Mop Combo Self-Emptying, 6,000Pa
The budget entry, with home mapping, app and remote control, a 75 day self-empty claim, and a 180 minute runtime claim
6,000Pa is a fraction of the roborock number, and budget mapping is where the babysitting starts
Prices and availability were captured from Amazon Creators API and may change.
How I judge these four
Every robot that gets a recommendation from me has to survive the same five questions, and they are the five I would ask about any of these four: Can it find the dock from the back bedroom without help? Does it get stuck on the same phone cord twice? What does the mop actually do to a dried-on stain? Does the bin survive a week of two-dog hair without clogging? Would I trust it to run while I am at work?
I have not run all four of these on my floor, and I am not going to pretend I have. What I can do is take each published spec, tell you what it promises, tell you what it leaves out, and flag where that promise usually breaks in a real house with dogs, cords, and a sofa table that eats robots.
What a self-emptying dock actually buys you
All four of these are sold with some version of the same promise: you do not touch the bin for weeks. Two of them put a number on it, a 75 day self-emptying claim on the iRobot Roomba 705X and on the T20+. That is a real convenience, and it is also the most oversold feature in this category.
Here is the honest version. A self-emptying dock is 75 days of dirt, not 75 days of never touching the robot. The bag fills, the filter clogs, the roller collects hair, and the mop pad or mop tank still needs water. The dock removes one chore (emptying the bin) and leaves the rest. What I like about the dock is not the time saved, it is the hair I do not have to look at. Emptying a bin full of husky fur every other day is a chore I am happy to hand off.
The other thing worth knowing: the dock is the loudest part of the whole machine. When it empties, it sounds like a small jet. If your dock sits near a bedroom, schedule the empty for the middle of the day.
Navigation decides whether you babysit it
Navigation is everything. Suction means nothing if the robot cannot find the dock or gets stuck on the same cord twice, and this is the single biggest difference between these four models.
The roborock Qrevo Edge 2 is the one in this group that leads with hardware, and the 3.14 inch ultra-slim body matters more than people realize. In a ranch-style house, the clearance under the sofa table and the edge of the kitchen cabinets is the difference between a robot that cleans a whole room and one that parks itself in the one spot you cannot reach. A slimmer body is not a gimmick, it is square footage.
The Roomba 705X leans on AI obstacle avoidance, which is the feature I care about most in a house with two dogs. Obstacle avoidance is what keeps a robot from dragging a charging cable around the living room or running through something the dogs left behind. It is also the feature that decides whether you can schedule a clean and leave.
The T20+ lists home mapping and app plus remote control at the budget end. Mapping at this price is the feature that changes everything about how much you babysit the thing, because a map is what gives you no-go zones. No-go zones are how you fence off the dog bowls, the cable tangle behind the TV stand, and the rug the robot always eats. If a budget robot maps reliably, it punches far above its price.
The Shark PowerDetect AV2820S is the one where I would want to see the dock-finding run from the back bedroom before I believed anything. The name sells detection and self-emptying, not a mapping technology, so that is the first thing I would verify in the app on day one.
Pet hair is the only test that matters
If a robot cannot handle husky-level shedding, nothing else about it matters. Two of these four put pet hair in the product name, which tells you where the marketing budget went.
The Roomba 705X claims 175x more suction and ships with an extending self-cleaning roller mop, and it is explicitly pitched as ideal for pet hair. The self-cleaning roller is the part I care about: hair wrapped around a roller is the number one maintenance task on any robot, and a roller that untangles itself is worth real money.
The roborock Qrevo Edge 2 brings a 25,000Pa figure, the largest number in this comparison by a wide margin. Suction alone does not clean a floor, but on low-pile carpet it is the spec that pulls embedded hair out of the fibers instead of skating over the top.
The T20+ claims 6,000Pa and lists pet hair, carpet, and hard floor in its own description. That is a realistic figure for a budget machine, and on hardwood with a daily pass it is enough. On carpet with two shedding dogs, expect to run it more often than a higher-suction unit.
Mopping is light maintenance, not a deep clean
I will keep saying this until the marketing stops: robot mopping is light maintenance. It handles footprints, dust, and the general film that builds up on a kitchen floor. It does not handle dried-on stains or sticky spills, and no dock on this list changes that.
The Roomba 705X has the most interesting mopping story here, with an extending self-cleaning roller mop and a dock that hot washes and dries the pad. Hot wash and dry is the feature that keeps a mop from smelling like a wet dog by week three, which is a real problem with cheaper mop systems.
The roborock Qrevo Edge 2 and the T20+ are both sold as vacuum and mop combos, so both will drag a wet pad across the tile. Expect them to keep the kitchen presentable, not to scrub.
The Shark PowerDetect AV2820S is the odd one out in this group: it is the only model here sold as a vacuum without a mop in the name. If you already hand mop and you want a robot that is excellent at one job instead of average at two, that is not a weakness.
The trade-offs, one by one
iRobot Roomba 705X. Visit on Amazon →. You are buying reliability and the confidence that you will never have to troubleshoot it. The trade-off is money. You are paying a brand premium for cleaning that is good, not remarkable, and this is the most expensive of the four.
Shark PowerDetect AV2820S. Visit on Amazon →. This is the sensible middle. A self-empty dock, a name that has been in the category for years, and none of the top-tier markup. The trade-off is that it does not lead any spec column, and the mapping tech is not advertised the way the competition advertises theirs.
roborock Qrevo Edge 2. Visit on Amazon →. The 25,000Pa figure and the ultra-slim body are what you are paying for, and if you want the best app and the best mapping in this group, this is it. The trade-off is premium money for cleaning that is not double the cheaper machines. You are paying for polish, and it is worth it, but be honest that polish is what you are buying.
T20+. Visit on Amazon →. The budget entry, with a 75 day self-empty claim and a 180 minute runtime claim that should cover most of a main floor on one charge. The trade-off is 6,000Pa and budget mapping. Judged as a budget robot, that is a fair deal. Judged against the roborock, it is not a close contest, and it was never going to be.
Which one I would buy
For my own house, the roborock Qrevo Edge 2 is the one I would want, because mapping, a real self-empty dock, and an ultra-slim body are exactly the three things that decide how often I have to intervene.
For most people reading this, the Shark PowerDetect AV2820S is the pick. It is the middle of this group on price, it self-empties, and it does not ask you to pay for the two brand names that carry the biggest premium.
If you want a robot you never think about and you are fine paying for that, the Roomba 705X is the one to buy. If you want to spend as little as possible and still get a mapped, self-emptying robot, the T20+ is the entry ticket.
What I am watching next
Two things. First, dock maintenance: a self-empty dock that still needs a weekly filter clean is only half a convenience, and I want to know which of these four actually stretches a bag past a month of two-dog hair. Second, the back-bedroom dock run. Any robot can find its dock from the hallway. The test is whether it can cross a house, navigate a rug transition, and dock without me watching.
And the standing reminder: keep your real vacuum. The robot keeps the floor livable between passes, and that is the whole job.