Robotic pool cleaner comparison

Dolphin Echo vs Dolphin Liberty 300

A side-by-side comparison of pool fit, cleaning coverage, filtration, controls and the better Pool Express option.

By Brian Williamson, Pool Express product specialist
Updated November 9, 2026

Better alternative

A stronger Pool Express option

Dolphin Echo and Dolphin Liberty 300 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Cayman. Inground and above-ground pools up to 40 ft that need floor and wall cleaning.

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Echo

Dolphin Echo

Inground and above-ground pools up to 33 ft that need floor and wall cleaning with the least fuss.

Listed price $749

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Liberty

Dolphin Liberty 300

Inground and above-ground pools that need floor and wall cleaning, with fine debris, without a power cord.

Listed price $1,099

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A better alternative

What we recommend instead

Pool Express pick

Dolphin Cayman

Inground and above-ground pools up to 40 ft that need floor and wall cleaning.

$1,079

Buy Dolphin Cayman

Buying guidance

Dolphin Echo or Dolphin Liberty 300: our take

Dolphin Echo and Dolphin Liberty 300 are compared on pool fit, cleaning reach, debris handling, controls and ownership details. The recommendation is based on the job the robot must do—not a simple feature count.

Pool fit and cleaning reach

Both robots are intended for inground and above-ground pools. Dolphin Echo has a published maximum pool length of 33 ft; the other model does not have a verified length in our source material. Each cleans floor and walls, so coverage alone does not separate them. Dolphin Echo lists 1 active brush and CleverClean navigation. Dolphin Liberty 300 lists Dual DC motors.

Filtration and debris

Dolphin Echo includes Basket; Dolphin Liberty 300 includes Basket and UltraFilter. Dolphin Liberty 300 has the clearer documented edge for fine silt, pollen and sand.

Controls and day-to-day ownership

Dolphin Echo provides one-touch starts and power-supply controls; Dolphin Liberty 300 provides no fully published timer, app or remote specification. Dolphin Echo uses continuous corded power, while Dolphin Liberty 300 uses cordless battery power.

Price, warranty and the decision

Dolphin Echo is listed at $749 and Dolphin Liberty 300 at $1,099; Dolphin Echo is $350 less. Each lists a 2-year manufacturer warranty. Dolphin Echo and Dolphin Liberty 300 each have a specific fit, but neither is the Pool Express pick for this job. Our better alternative is Dolphin Cayman. Inground and above-ground pools up to 40 ft that need floor and wall cleaning.

Feature check: what each robot actually has

A green check means the feature is documented as included. A red X means it is documented as absent. A dash means the source does not make the feature clear.

Feature	Dolphin Echo	Dolphin Liberty 300
Cleans the pool floor	Yes	Yes
Climbs and cleans walls	Yes	Yes
Scrubs the waterline	No	No
Fine-debris filter included	No	YesEdge
Large-debris filter	Yes	Yes
Automatic scheduling	No	Not listed
Smartphone app	No	Not listed
Anti-tangle swivel	No	Not listed
3-year warranty	No	No
No recharging between cycles	YesEdge	No
Built-in UV-C water treatment	No	No

Unknown is not treated as “no.” Specifications come from the product pages, current catalog records and manufacturer material collected for this site.

Where Dolphin Echo stands out

Dolphin Echo is the better fit for shoppers prioritizing the lower $749 starting price.

Runs from continuous plug-in power without a recharge between cycles
Is listed $350 lower

Where Dolphin Liberty 300 stands out

Dolphin Liberty 300 is the better fit for owners who value cordless handling more than automatic scheduling and continuous power.

Includes filtration for sand, pollen and other fine debris
Cordless, battery powered