Under $400 buys basic robotic cleaners and a few cordless models. They clear the floor of most pools, but navigation is usually simple, filter baskets are small and wall or waterline cleaning is limited, so they suit smaller, regular-shaped pools kept fairly clean.
Check the pool size and floor type against the maker’s guidance, as well as cord length and swivel quality, since tangles are the common failure. A top-loading filter is easier to empty than a bottom-access one. Cordless units trade run time for freedom from cables, so confirm how long a charge lasts and how long the battery will keep working.
Prices were last checked November 11, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Best Robotic Pool Cleaners Under $400: Cordless
- Dreame Z1#1 of 20Full review
A strong-value cordless robot for small-to-mid-size pools whose owners want long runtime and real navigation for about $300. Fine silt needs a robot with a finer filter.
Dreame $299$2991,950 sq ftTo waterlineUltrasonic + 3D light2 yr - Dreame Z1 Pro#2 of 20Full review
A well-equipped mid-price robot for above-ground or in-ground pools up to about 2,000 sq ft, with mapping and easy waterline parking. Pools with fine silt need a robot with a finer filter.
Amazon $333.76$333.762,160 sq ftTo waterlineUltrasonic + 3D light2 yr - Winny C1#3 of 20Full review
Winny’s version of the WYBOT C1 (model OS7010C). At the same price, the WYBOT C1 has clearer specs and more owner reviews.
Amazon $399.99$399.991,630 sq ftTo waterline-2 yr - WYBOT C1#4 of 20Full review
WYBOT’s best seller and a solid value for in-ground pools up to about 1,600 sq ft that need walls and waterline cleaned.
Amazon $399.98$399.981,620 sq ftTo waterlineGyroscope or sensors2 yr - Seauto SAT 25#5 of 20Full review
A low-cost, sonar-guided cordless robot for in-ground and above-ground pools up to about 2,150 sq ft that need floor, wall and waterline cleaning. Pools with fine silt, raised drains or sharp steps need a different robot.
Amazon $269.99$269.992,150 sq ftTo waterlineUltrasonic1 yr - Aiper Seagull Pro#6 of 20Full review
A budget wall-climbing robot for small-to-mid-size in-ground pools whose owners don’t need an app. The Scuba S1 adds scheduling and a finer filter for a little more.
Amazon $399.99$399.991,600 sq ftTo waterlineGyroscope or sensors2 yr - Seauto Crab#7 of 20Full review
Skip it: independent testing found poor debris pickup. Any WYBOT C1 or Aiper at a similar price is a safer bet.
Amazon $209.95$209.951,610 sq ftFloor + walls-2 yr - Winny B1#8 of 20Full review
A WYBOT B1 lookalike for small pools. With no published runtime or coverage, buy the WYBOT B1 unless this one is clearly cheaper.
Amazon $324.98$324.98-To waterline-1 yr - Seauto SAT20 Pro#9 of 20Full review
A tracked, sonar-guided full-pool robot at a low price for mid-size and large in-ground pools. Buyers who want scheduling or a longer warranty should look at WYBOT.
Seauto $299$2992,150 sq ftTo waterlineUltrasonic1 yr - WYBOT B1#10 of 20Full review
A light full-pool robot for small, flat in-ground or above-ground pools. Bigger or sloped pools need the C1 or above.
WYBOT $334.93$334.931,150 sq ftTo waterline-1 yr - WYBOT B1C#11 of 20Full review
A lightweight floor-and-wall robot for small in-ground pools, priced a little above the B1. Buy it only if the Amazon price beats the B1.
Amazon $334.99$334.991,220 sq ftFloor + wallsGyroscope or sensors- - Seauto SAT20#12 of 20Full review
A bare-bones cordless floor-and-wall cleaner for budget buyers with smooth above-ground pools. Buyers who want sonar navigation and waterline scrubbing should step up to the Seauto SAT 25.
Amazon $179.99$179.992,100 sq ftFloor + walls-- - Winny S1103K#13 of 20Full review
A floor-only robot for large flat above-ground pools that want daily runs. Wall cleaning still means a brush.
Amazon $199.99$199.991,350 sq ftFloor only-- - Winny A1#14 of 20Full review
A WYBOT A1-style floor cleaner for small above-ground pools. Buy whichever of the two is cheaper.
Amazon $169.99$169.991,100 sq ftFloor only-- - WYBOT A1#15 of 20Full review
A cheap, light floor cleaner for small flat pools. Skip it if your pool has a sloped deep end or dirty walls.
Amazon $169.99$169.991,080 sq ftFloor only-1 yr - Aiper Scuba SE#16 of 20Full review
An entry-level floor cleaner for small flat pools where price matters most. It won’t touch walls or the waterline.
Amazon $135.99$135.99860 sq ftFloor only-1 yr - Aiper Seagull SE#17 of 20Full review
A basic floor cleaner for small, flat above-ground pools on a tight budget. Anyone with sloped floors or dirty walls needs a wall-climbing robot.
Amazon $159.99$159.99860 sq ftFloor only-1 yr - Bestway AquaTronix G200#18 of 20Full review
A basic floor cleaner for small, flat above-ground pools on a tight budget. Bigger pools, or any with dirty walls, need more robot.
Bestway $129.60$129.60540 sq ftFloor onlyRandom1 yr - Bestway Flowclear AquaRover#19 of 20Full review
An older Bestway floor robot for flat above-ground pools. The cheaper G200 does the same job.
Amazon $197.99$197.99-Floor onlyRandom- - Bestway Flowclear AquaGlide#20 of 20Full review
Only for very small flat pools up to 16 ft across. The AquaTronix G200 costs less and covers more than double the area.
Amazon $150$150220 sq ftFloor onlyRandom-
Not quite right? Try these
- Under $500 25
- Under $1,000 58
- Best Robotic Pool Cleaners for Above-Ground Pools 58
- Best Robotic Pool Cleaners That Clean the Waterline 58
- Best Robotic Pool Cleaners That Also Skim the Surface 5
- Best App-Controlled Robotic Pool Cleaners 48
- Best Cordless Robotic Pool Cleaners 49
- Best Corded Robotic Pool Cleaners 42
- Compare pool cleaners head to head 408
- All pool cleaners 91