The short answer
- Buy Beatbot if you want maximum coverage without a cord — floor, walls, waterline and even the water surface — AI navigation, and a 3-year full-replacement warranty, and you accept that a battery is a wear item.
- Buy Dolphin if you want the deepest scrub (rotating brushes plus fine filtration), the longest track record in the category, and a machine that routinely outlives cordless rivals — and you don't mind a cord and an outlet near the pool.
Coverage: Beatbot's home turf
No brand covers more of the pool than Beatbot. The AquaSense 2 handles floor, walls, waterline and surface in one cycle; the Ultra stretches that to pools of roughly 320 m² (about 3,400 sq ft) with an AI camera and 27 sensors mapping the layout. Surface skimming — pulling in leaves and pollen before they sink — is something no Dolphin does.
Dolphin covers floor and walls across the range, with true waterline cleaning reserved for its upper tiers. It's thorough where it cleans — it just cleans fewer zones.
Edge: Beatbot, clearly, on outright coverage.
Cleaning style: suction and AI vs scrubbing and filtration
Beatbot cleans with strong suction guided by AI vision — excellent on leaves, sand and everyday debris, and smart about not missing zones. Dolphin cleans by physically scrubbing: rotating brushes lift algae and biofilm off the surface, and its premium models pair that with ultra-fine filtration that traps particles cordless filters let through.
If your pool fights algae or cloudy water, Dolphin's mechanical scrubbing plus fine filtration is the more decisive weapon. If your pool mostly collects debris, Beatbot's approach is more than enough — and covers more zones doing it.
Edge: Dolphin for algae-prone pools; Beatbot for debris and hands-off coverage.
Longevity and warranty: two different bets
Dolphin's corded machines are the longevity benchmark of the category — no battery to degrade, parts available for years, and plenty of units still running past year seven. The catch: full warranty terms typically require buying through an authorized dealer.
Beatbot counters the battery question head-on with an unusually strong 3-year full-replacement warranty on its flagships — if a covered issue appears, the unit is replaced rather than repaired. That's real peace of mind, but physics still applies: a battery loses capacity over the years in a way a cord never does.
Edge: Dolphin on raw longevity; Beatbot's warranty narrows the gap for the first three years.
Convenience
Beatbot wins this round before it starts. No cord across the deck, app control, and smart surface parking: when the cycle ends, the robot floats to the edge and drains itself so retrieval is light. A corded Dolphin means managing a floating cable and hauling the unit out by hand every time.
Edge: Beatbot, decisively.
Price
Neither brand is the budget option, but they're priced differently: Dolphin's sweet spot sits in the accessible mid-range with corded workhorses, while Beatbot's lineup climbs steeply — its Ultra flagship costs about as much as two premium Dolphins.
What the Beatbot premium buys: surface skimming, AI mapping, cordless freedom, the 3-year replacement warranty. What the Dolphin saves you: several hundred to a couple thousand dollars, invested instead in scrubbing power and lifespan.
Edge: Dolphin on value; Beatbot charges for capabilities nobody else has.
So which should you buy?
Choose Beatbot if you have a large or complex pool, want the most hands-off experience available — including the water surface — and value the 3-year replacement warranty. Best picks: the AquaSense 2 for full-coverage cordless cleaning, or the AquaSense 2 Ultra for very large pools.
Choose Dolphin if your pool battles algae, you want a machine measured in decades rather than seasons, and an outlet near the pool isn't a problem. Best picks: the M600 for premium corded cleaning, or the Nautilus CC Plus as the proven value option.
Sitting in the middle on budget? That's Aiper territory — see our Aiper vs Beatbot and Dolphin vs Aiper comparisons.