Quick Answer: For most pool owners, Dolphin is the better buy — its robotic cleaners run independently of your pump, scrub floors and walls, and cost less to operate. Choose Polaris if you have heavy leaf debris and want a pressure-side cleaner that bags large debris before it reaches your filter. The flagship matchup is the robotic Dolphin Nautilus CC Plus vs the pressure Polaris 360.
Dolphin and Polaris are two of the biggest names in pool cleaning, but they’re best known for different technologies. Understanding that difference is the key to choosing.
Dolphin vs Polaris at a glance
| Dolphin (Maytronics) | Polaris (Fluidra) | |
|---|---|---|
| Known for | Robotic cleaners | Pressure-side cleaners |
| Power source | Own low-voltage motor | Return line / booster pump |
| Pump strain | None — fully independent | Uses your pool's pump |
| Best at | Scrubbing walls, floor, waterline | Collecting large leaves & debris |
| Running cost | Very low (pennies per cycle) | Higher (pump runtime) |
| Flagship | Nautilus CC Plus (~$799) | Polaris 360 (~$549) |
By the numbers
- Running cost: According to the U.S. Department of Energy, pool pumps are among the largest electricity users in a typical home. Dolphin’s robotic cleaners run on low-voltage power independent of your pump — using only a few cents of electricity per cycle — while Polaris pressure-side cleaners require your main pump (and the booster-driven models a separate booster pump) to operate.
- Pool-size rating: Maytronics rates the Dolphin Nautilus CC Plus for inground pools up to 50 ft, so a single robot covers most residential pools in one cycle.
- No booster needed: Per Fluidra (Polaris), the Vac-Sweep 360 connects to a single dedicated return line and runs without the separate booster pump that the Polaris 280 requires, lowering both install and running costs.
- Leaf handling: Polaris’s pressure-side cleaners collect leaves and large debris in their own filter bag before it reaches your pool’s filter, which is why a Polaris 360 is often the better pick for tree-shaded pools — while a Dolphin robot filters debris into an onboard basket and adds the wall and waterline scrubbing pressure cleaners do less reliably. (See our best pool cleaner for leaves guide for the full debris breakdown.)
Dolphin: the robotic specialist
Dolphin Nautilus CC Plus
- Self-contained robot — no hoses, no strain on your pump.
- Dual active brushes scrub floor, walls, and waterline.
- Easy top-load filter basket and weekly scheduling.
- Runs on pennies of electricity per cycle.
Dolphin (made by Maytronics) is the leading robotic-cleaner brand. Its robots have their own motor and filter, so they don’t load your pump or filter system, and they actively scrub surfaces rather than just collecting debris. They’re the most energy-efficient option and the best at leaving walls and waterline genuinely clean. For most modern pools, this is the technology to choose — see our full best robotic pool cleaner guide. If you’ve settled on the Dolphin brand, our best Dolphin pool cleaner guide ranks every current model from the E10 to the Sigma.
Polaris: the pressure-cleaner king
Polaris Vac-Sweep 360
- Pressure-side cleaner with its own debris bag.
- Bags leaves, acorns, and pebbles before they reach your filter.
- No separate booster pump required for the 360.
- Ideal for pools under heavy tree cover.
Polaris (now part of Fluidra) built its reputation on pressure-side cleaners. Because they collect debris in their own bag instead of pulling it through your filter, they excel at handling large debris — the classic choice for leaf-heavy yards. Polaris also makes robotic models (the VRX and Freedom lines) if you want to stay in the brand but go robotic. If you’ve decided on Polaris, our best Polaris pool cleaner guide ranks every current model from the robotic VRX iQ+ to the pressure-side 280 and 3900 Sport, and our best pressure-side pool cleaner guide compares Polaris against Pentair and Hayward pressure cleaners head-to-head.
Which should you buy?
- Choose Dolphin if: you want the best overall clean, low running costs, and a cleaner that scrubs walls and waterline without touching your pump. This fits most pool owners.
- Choose Polaris if: your pool collects a lot of leaves and acorns, and you’d rather bag that debris separately than filter it — or you already have the plumbing for a pressure cleaner.
- Either way: match the cleaner to your pool size and surface, and prioritize good local parts/service support.
If you’re open to other brands too, our best automatic pool cleaner guide compares robotic, suction, and pressure cleaners side by side.
The bottom line
For most pools in 2026, Dolphin’s robotic cleaners are the better all-round choice — efficient, thorough, and easy on your equipment. Polaris earns its place for leaf-heavy pools where a pressure cleaner’s debris bag is the real advantage. Decide by your debris load and how much you value scrubbing power versus bagging capacity.