Head to head
xTool S1 vs Atomstack A20 Pro V2
The two most common ways to buy a 20 W-class diode today: xTool's enclosed, Class 1 S1, or Atomstack's open-frame A20 Pro V2 with a large bed and add-on bundles.
Verdict
Pick the xTool S1 if the laser lives in a shared home or you want the simplest safe setup: the enclosure makes it Class 1, contains smoke for one duct, and auto-focus removes a common beginner mistake. Pick the Atomstack A20 Pro V2 if you have a ventilated workspace and want an open frame you can put over large boards, and you are happy to add the air-assist and rotary bundles.
Choose the xTool S1 if…
- Children, pets or housemates are around while you work
- You want fumes contained and ducted from one outlet
- You want auto-focus and a 40 W option
Choose the Atomstack A20 Pro V2 if…
- You have a separate, ventilated workspace
- You want to engrave items bigger than an enclosure allows
- You already use or plan to use LightBurn
Specs
Side-by-side specifications
From manufacturer data. Prices and stock are on the retailer's page.
| xTool S1 | Atomstack A20 Pro V2 | |
|---|---|---|
| Brand | xTool | Atomstack |
| Type | Enclosed | Open frame |
| Optical power | 20W / 40W | 20W |
| Work area | 498 × 319 mm | 400 × 365 mm |
| Laser class | Class 1 | Class 4 |
| Air assist | Optional extra | Optional extra |
| Camera | No | No |
| Software | xTool Creative Space, LightBurn | LightBurn, LaserGRBL |
| Accessories we list | 4 | 5 |
Frequently asked questions
Which cuts thicker wood?
At equal module power they are close. The S1's 40 W version cuts thicker stock in fewer passes than any 20 W machine.
Does the A20 Pro V2 include air assist?
The base kit does not; Atomstack sells bundles with its auto air-assist pump and with a rotary chuck.
Do both work with LightBurn?
Yes. The A20 Pro V2 is GRBL-based, and the xTool S1 is supported by LightBurn as well as xTool's own software.
Still deciding? See the full ranking or the other comparisons.
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