Dolphin Sigma
$2999
$2349
Save $650
3 years manufacturer warranty
Dolphin Sigma vs Dolphin Liberty 300
A side-by-side comparison of the Dolphin Sigma and Dolphin Liberty 300 — price, filtration, cleaning coverage, brushes and warranty — to help you pick the right Dolphin robotic pool cleaner.
Dolphin Liberty 300
$1199
2 years manufacturer warranty
| Feature | Sigma | Liberty 300 |
|---|---|---|
| Overview | ||
| Price | $2999$2349 | $1199 |
| Lineup | ProLine™ | Liberty™ (cordless) |
| Best for | The most advanced clean | Cordless, week-long charge |
| Pool size | Up to 50 ft | Up to 50 ft |
| Cleaning coverage | Floor + Walls + Waterline | Floor + Walls |
| Cleaning cycle | 2.5 hours | 1.5 hours; up to a week of cycles per charge |
| Suction | 4,500 GPH | Battery powered |
| Scrubbing brushes | 2 (Active brushes) | 1 (active) |
| Filtration | NanoFilters™ | Top-load filter basket |
| Standout features | ||
| Waterline cleaning | Included | No |
| 3-year warranty | Included | No |
| NanoFilters™ included | Included | No |
| App control | Included | No |
| Anti-tangle swivel | Included | No |
| Corded power | Included | No |
| Commercial-grade motors | Included | No |
| Navigation & ownership | ||
| Navigation | SmartNav 3.0™ with gyroscope | CleverClean™ |
| Weekly scheduling | Weekly timer | No weekly timer |
| App control | myDolphin Plus (Wi-Fi and Bluetooth) | No app control |
| Cable | 55 ft with anti-tangle swivel | None (cordless) |
| What is included |
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| Warranty | 3 years | 2 years |
Dolphin Sigma vs Dolphin Liberty 300: how they compare
The Dolphin Sigma is part of the ProLine™ lineup — the most advanced Dolphin ever, with a gyroscope and app control. It cleans pools up to 50 ft with floor + walls + waterline coverage and NanoFilters™ filtration, backed by a 3-year warranty.
The Dolphin Liberty 300 is part of the Liberty™ (cordless) lineup — cordless with up to a week of cycles per charge, an Eco mode and Click-Up™ pickup. It handles pools up to 50 ft with floor + walls coverage and Top-load filter basket filtration, backed by a 2-year warranty.
Our verdict: the Dolphin Sigma wins
The Dolphin Sigma is our pick. As part of the ProLine™ — one of our two top-recommended lineups — it steps ahead of the Dolphin Liberty 300 with floor + walls + waterline coverage, NanoFilters™ filtration and a 3-year warranty.
The Dolphin Liberty 300 is the cheaper option at $1199, but the step up to the Dolphin Sigma buys a meaningfully better clean and longer coverage that's well worth it.
Not sure yet? We're here to help
Every Dolphin Max-Series™ and ProLine™ robotic pool cleaner ships free and is backed by a full manufacturer warranty — explore our top-recommended robots and find the right fit for your pool.
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