Atomstack S20 Pro 20W vs Glowforge Spark
| Laser | ||
| Type | Diode Laser | Diode Laser |
| Wavelength | 445 nm | 455 nm |
| Optical Power | 20 W | 6 W |
| Performance | ||
| Work Area | 400 × 400 mm | 203 × 305 mm |
| Max Speed | 15,000 mm/min | 8,000 mm/min |
| Focus | Manual | Autofocus |
| Features | ||
| Enclosure | Yes | Yes |
| Air Assist | Yes | No |
| Rotary Compatible | Yes | No |
| WiFi | Yes | Yes |
| Camera | No | Yes |
| Physical | ||
| Approx. Price | $699 | $899 |
| Release Year | 2023 | 2024 |
| Weight | 16 kg | 4.9 kg |
Pros & Cons
Atomstack S20 Pro 20W
What we like
- Enclosed design for safer home operation
- WiFi and USB connectivity
- Air assist included
- 20W for cutting and engraving
- Rotary attachment compatible
Watch out for
- No built-in camera
- Moderate engraving speed
- Heavier than open-frame alternatives
- No autofocus
Glowforge Spark
What we like
- Easiest laser to get started with — ~30-minute setup
- Free Glowforge Print software works on any device (Mac, PC, tablet, phone)
- Built-in camera with live preview for material placement
- Class 1 enclosed — safe for home and classroom use
- Wide material library with auto-detected settings
Watch out for
- Cloud-dependent — requires internet for every job
- Small 203×305mm cutting area for the price
- Only 6W — limited cut depth and no thick stock
- Subscription costs for premium design catalogue
- Not compatible with LightBurn
Compatible Materials
Atomstack S20 Pro 20W
WoodAcrylicLeatherCardboardFabricPaperRubberStoneMetal Engraving
Glowforge Spark
WoodLeatherAcrylicCardboardFabricPaperRubber
The Atomstack S20 Pro 20W costs $699 (22% less) than the Glowforge Spark, which is priced at $899.
The Atomstack S20 Pro 20W has 70% more optical power (20W vs 6W).
The Atomstack S20 Pro 20W offers a 61% larger work area (400 × 400 mm vs 203 × 305 mm).
The Atomstack S20 Pro 20W has a 47% higher maximum speed (15,000 mm/min vs 8,000 mm/min).
Feature-wise, Atomstack S20 Pro 20W includes air assist, while Glowforge Spark does not; Glowforge Spark includes a camera, while Atomstack S20 Pro 20W does not; Atomstack S20 Pro 20W includes rotary attachment compatibility, while Glowforge Spark does not.