Quick Answer: Choose a fiber laser if your work is bare metal — stainless steel, aluminum, brass, titanium, or gold — because a fiber laser’s 1064nm beam is absorbed directly by metal, marking it permanently at galvo speed; entry 30W fiber machines like the OMTech 30W Fiber start around $2,499. Choose a CO2 laser if you need to cut or engrave wood, acrylic, leather, or glass — a CO2 beam at 10,600nm slices clean, flame-polished acrylic edges a fiber laser cannot cut at all, and entry machines like the Monport 40W start around $539, less than a quarter of fiber’s entry price. The two barely overlap: fiber owns bare metal, CO2 owns everything organic.
Fiber and CO2 lasers solve almost entirely different jobs, so this isn’t really a “which is better” question — it’s “which material do you actually work.” This guide breaks down what each wavelength can and can’t handle, the real price gap at both ends of the market, and names the exact machines worth buying in each camp for 2026.
Fiber vs CO2 at a glance
| Factor | Fiber laser | CO2 laser |
|---|---|---|
| Wavelength | 1064nm (infrared) | 10,600nm (infrared) |
| Typical power | 20–100W source | 40–60W tube (desktop) |
| Entry price | ~$2,000–$2,500 | ~$539–$1,900 |
| Marks bare metal? | Yes, deep and permanent | Only with Cermark spray |
| Cuts clear acrylic? | No | Yes, flame-polished edge |
| Engraves wood/leather? | Poor to none | Excellent |
| Marking/engrave speed | Up to ~7,000mm/s (galvo) | Up to ~600mm/s |
| Consumable | None — source lasts ~100,000 hrs | Glass tube, ~1,000–10,000 hrs |
| Needs venting? | Light fume, metal marking only | Yes, every material cuts/burns |
Fiber vs CO2 by the numbers
- A fiber laser emits at 1064nm; a CO2 laser emits at 10,600nm — roughly 10x further into the infrared. Bare metal absorbs 1064nm directly but reflects most 10,600nm light, while wood, acrylic, and leather absorb 10,600nm strongly and barely react to 1064nm — this wavelength split is the entire reason the two machines don’t compete for the same job (per manufacturer optics data from OMTech and Monport).
- Galvo fiber lasers mark at up to ~7,000mm/s, more than 10x the ~600mm/s top speed of a desktop CO2 machine like the xTool P2S (per Monport and xTool specs) — fiber is built for high-volume metal marking, CO2 for cutting throughput on organics.
- Entry fiber machines start around $2,000–$2,500 (OMTech 30W Fiber, ComMarker B4), while a real entry CO2 machine, the Monport 40W, runs about $539 — CO2 is roughly 4–5x cheaper at the low end, per current Amazon and manufacturer-store pricing.
- A CO2 glass tube lasts roughly 1,000–10,000 hours and is a wearing consumable (per Gweike and OMTech tube specs), while a fiber source is rated for ~100,000 hours with nothing to replace — fiber’s higher upfront cost buys a maintenance-free beam source for the life of the machine.
- CO2 cuts acrylic; fiber cannot cut it at all. xTool’s 55W P2S cuts roughly 18–20mm acrylic and thick wood, while fiber lasers — tuned for metal absorption — can’t cut clear or cast acrylic in any wattage (per xTool and OMTech material guides), which is the single clearest dividing line between the two categories.
When to choose a fiber laser
Pick a fiber laser if your product is bare metal — stainless steel flasks and knives, aluminum panels, brass tags, titanium jewelry, or anything that needs a permanent, deep mark with no coating or spray. Fiber costs more upfront and does almost nothing for wood or acrylic, but it’s the only real option for uncoated metal at production speed.
OMTech 30W Fiber Marking Machine — Best value fiber
- 30W split-type source marks and lightly engraves bare stainless, brass, and aluminum.
- Proven OMTech support and a large EZCAD2 tutorial community.
- Split design accommodates taller and odd-shaped parts under the head.
Running an engraving business? A free Amazon Business account unlocks quantity discounts and tax-exempt purchasing.
Monport GA 60W MOPA — Best deep-engraving fiber
- 60W MOPA source deep-engraves bare metal and adds color marking on stainless.
- Galvo speed for production runs of serialized parts, tools, and knives.
- Maintenance-free source rated for ~100,000 hours — no tube to replace.
When to choose a CO2 laser
Pick a CO2 laser if you need to cut — clear or cast acrylic, thick wood, leather, cardboard — or engrave organics fast. CO2 machines are cheaper to get into than fiber, but the glass tube is a wearing consumable and every cut or engrave needs fume ventilation.
Monport 40W CO2 Laser — Best ultra-budget CO2
- 40W glass tube cuts real wood and acrylic on a genuine desktop budget.
- Compact 12×8" bed fits small-batch signs, coasters, and craft projects.
- Runs LightBurn Pro for full DSP-level cut and engrave control.
xTool P2S (55W CO2) — Best overall CO2
- 55W tube engraves up to 600mm/s and cuts ~18–20mm acrylic and thick wood.
- Large 26×14" bed plus a pass-through slot for oversized stock.
- Dual cameras for precise placement; the No. 1 selling CO2 laser on Amazon.
Head-to-head by material
| Material | Fiber (1064nm) | CO2 (10,600nm) |
|---|---|---|
| Bare stainless steel | Deep, permanent | Needs Cermark spray |
| Bare aluminum | Deep, permanent | Needs Cermark spray |
| Anodized aluminum | Marks well | Not suitable |
| Brass / titanium / gold | Deep, permanent | Needs Cermark spray |
| Clear/cast acrylic (cut) | Not suitable | Excellent, flame-polished |
| Wood (cut/engrave) | Poor, surface scorch only | Excellent |
| Leather | Not suitable | Excellent |
| Glass (engrave) | Poor to none | Good, frosted surface mark |
How to decide in 30 seconds
- You work bare stainless, aluminum, brass, or titanium: buy fiber. Nothing else marks bare metal permanently at speed.
- You need to cut clear or cast acrylic, or thick wood: buy CO2. Fiber cannot cut acrylic in any wattage.
- Budget under $1,000: CO2 wins easily — the Monport 40W gets you real cutting power for ~$539, versus $2,000+ for entry fiber.
- You want the lowest running cost over years of heavy use: fiber, once past the higher upfront price — its ~100,000-hour source needs no tube replacement, where a CO2 tube wears out in 1,000–10,000 hours.
- You need both bare-metal marking and organic cutting in one shop: most engraving businesses that scale end up owning one of each rather than compromising with a single machine.
The bottom line
Buy a fiber laser if your product is bare metal — see our best fiber laser engraver roundup for the full lineup, including MOPA color-marking options for jewelry. Buy a CO2 laser if you mainly cut or engrave wood, acrylic, or leather — see our best CO2 laser engraver ranking for machines from $539 to $3,999. The dividing line is simple: fiber’s 1064nm beam is absorbed by metal and reflected by organics, while CO2’s 10,600nm beam does the opposite — so the two rarely compete for the same job. Not sure fiber or CO2 is even the right category? Our diode vs CO2 laser and diode vs fiber laser comparisons cover the budget-friendly diode alternative for wood, leather, and coated metal. Marking bare metal specifically for stainless steel or aluminum products? Our best laser engraver for stainless steel and best laser engraver for aluminum guides break down exact settings by machine. For the full picture across every laser type side by side, our best laser engraver pillar ranks diode, CO2, and fiber together.
Last updated August 2026: corrected the CO2 price-range ceiling from a stale $5,995 to $3,999, matching the current best CO2 laser engraver lineup topped by the xTool P2S — the older figure predated that roundup’s most recent flagship-pricing refresh.