GS3 | 1 Group

List Price: $7,500

La Marzocco introduced the GS3 as a single-group machine for those interested in brewing espresso at home, but it’s also frequently purchased for low-volume commercial settings, like coffee carts and trucks. The GS3 features many of La Marzocco’s notable innovations, including volumetric capabilities, saturated group heads, and PID temperature control.

Performs Best For

Home baristas and small commercial operations (carts, trucks, bakeries) looking for a reliable, straightforward, and compact espresso machine.

Fresh Cup uses a scoring rubric to rate espresso machines on a variety of metrics. See our scoring rubric:

Program Sophistication Gauges how deep and precise a café’s espresso program can be on the machine, and how much barista training it demands. Level 1 covers capsule or batch-brew stations, while Level 5 delivers full pressure/flow profiling, integrated scales, data logging and IoT connectivity for competition-grade menus. Volume Capability Reflects the peak drinks-per-hour the machine can maintain without recovery issues. Scores run from under 30 drinks (Level 1, boutique bar) to 120+ drinks per hour (Level 5, drive-thru chains or stadium kiosks). Automation Support Measures how many routine tasks the machine handles on its own—dosing, flushing, milk steaming and self-cleaning. It spans fully manual levers (Level 1) up to bean-to-cup super-automatic sequences (Level 5). Extraction Control Rates the operator’s control over brewing variables. Entry levels lock in temperature and pump pressure; mid-levels add independent PIDs and programmable pre-infusion; Level 5 delivers full pressure/flow profiles with live data logging. Workflow & Ergonomics Assesses how the machine’s physical design speeds service and reduces fatigue. Higher scores denote low-profile bodies, cool-touch or auto-purge steam wands, intuitive UIs and other features that minimise repetitive strain. Tech & Connectivity Looks at the depth of digital features—from simple PID displays and shot timers (Level 2) up to Wi-Fi dashboards, cloud telemetry, open APIs and fleet-management suites (Level 5). Design Customization Captures how extensively the machine’s appearance and UI can be tailored. Level 1 models ship in a single finish; mid-range offers swappable colour panels or logo plates; Level 5 machines feature fully modular skins and deep UI-branding options.
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Key features and innovations | Best machines by setting | What to know before you buy

Noteable Features

Dual-Boiler System

Unlike some home espresso machines, the GS3 boasts a dual boiler that gives at-home baristas the ability to pull espresso and steam milk without deviations in quality, temperature, or pressure.

Plumbing Configurations

If desired, the GS3 can be plumbed directly into a water source, making it an option for small commercial opportunities as well. The 3.5-liter tank makes this optional, however.

Volumetric Capabilities

The GS3 is available in either MP (Manual Paddle) or AV (Automatic Volumetric) configurations. This allows home baristas to either dial in their workflow with volumetric programming or manually extract each shot.

PID Temperature Control

Home baristas can perfectly calibrate brewing temperature with the built-in PID temperature control and digital display. This feature also ensures thermal stability, shot after shot.

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