Markforged's entry fiber printer: a desktop machine that prints Onyx and reinforces it with continuous fiberglass. It is for teams that want stronger prototypes, tools and fixtures than plain plastic gives.
Does the Markforged Onyx Pro 3D printer work with SimplyPrint, OctoPrint, Mainsail and Fluidd?
Each way of connecting it, what it needs, and how to set it up.
The maker's cloud
Possible, not built yet
Cloud-only printer: it prints from Markforged's Eiger platform, which has an API. SimplyPrint can build support through that API if enough people vote for it.
Source
Markforged Onyx Pro specifications: bed size, print height and more
Its size, temperatures, multi-material and how it connects, from the maker and our own research.
Read more by the manufacturer
Size
Build volume
320 x 132 x 154 mm
Bed type
Rectangle
Bed size
320 x 132 mm
Max print height
154 mm
Printing
Enclosure
Fully enclosed
Motion system
Other kinematics
Max extruder temperature
300 °C
Has heated bed
No
Number of nozzles
1
Toolheads
2
Direct drive
No
Probing tool / Auto Bed Leveling
No
Filament width
1.75 mm
Multi-material
Toolchanger or hotend changer
No
IDEX (independent dual extruders)
No
Connecting
Connectivity
Wi-Fi
Supports serial printing
No
Shipped firmware
The maker's own
The printer
Printer manufacturer / brand
Markforged
Printer model name
Onyx Pro
Made by a company from
USA
Launched
November 2016
Still made
Yes
Disclaimer:
We strive to keep this information as current and accurate as possible, but cannot guarantee its completeness or reliability. Our data is based on user submissions and manufacturer references.
What filament can the Markforged Onyx Pro print?
Filament compatibility for the Markforged Onyx Pro: the materials Markforged lists for it.
It prints only Markforged's own materials.
Filament
Suitability
Notes
PLA
Great
On the maker's list of materials for this printer.
PETG
Not ideal
Not on the maker's list, and this printer prints only the maker's own materials.
TPU & flexibles
Great
On the maker's list of materials for this printer.
ABS & ASA
Not ideal
Not on the maker's list, and this printer prints only the maker's own materials.
Nylon (PA)
Great
On the maker's list of materials for this printer.
Polycarbonate (PC)
Not ideal
Not on the maker's list, and this printer prints only the maker's own materials.
Carbon-fiber & glass-filled
Great
On the maker's list of materials for this printer.
Tip: this is a general guide from the printer's specs - always check your filament's recommended settings. With SimplyPrint you can save a profile for each spool and track exactly what filament you have in stock.
When to choose the Markforged Onyx Pro
Choose it when fiberglass reinforcement is enough. If you need carbon fiber, Kevlar or HSHT fiberglass, take the Mark Two, which is the same size; for a larger bed and automatic calibration look at the X7.
Pros
Reinforces Onyx parts with continuous fiberglass; Markforged says they are 10x as strong as traditional printing plastics.
Prints Onyx, Precise PLA and Smooth TPU 95A.
Aluminum unibody frame and a removable bed with 10 µm repeatability.
Same 320 x 132 x 154 mm build volume as the Mark Two.
Cons
Not supported by SimplyPrint yet: it can be built on Markforged's cloud API if enough people vote for it.
Runs Markforged's closed firmware with Eiger, so there is no OctoPrint or Klipper route.
Fiberglass is the only continuous fiber; carbon fiber and Kevlar need the Mark Two.
Small build volume and manual shim leveling.
Who it suits
SchoolsCan work
A desktop machine for engineering courses, but it is cloud-bound and sold to professionals.
HobbyistsNot a good fit
Built for professionals, with closed firmware and no third-party route.
BusinessesGood fit
Fiberglass-reinforced prototypes and tooling on a desktop.
Print farmsNot a good fit
One small bed with manual leveling, and SimplyPrint cannot manage it today.
Printers like the Markforged Onyx Pro that work with SimplyPrint
Printers from the same maker, of a similar size, printing the same engineering materials or multi-material like it, that you can buy today and that we know work with SimplyPrint.
Who makes the Markforged Onyx Pro, and how open Markforged leaves you: whether its printers run without its cloud, take any filament and slicer, and can be repaired. Each area is rated from public sources.
Openness: Walled garden (1.3 of 5)
Walled garden
Walled gardenOpen
Markforged is an American maker of industrial 3D printers, founded in 2013 near Boston, known for nylon parts reinforced with continuous carbon fibre and for metal printing. Printers, materials and its cloud software Eiger are sold together as one closed platform to manufacturers, defence and aerospace. Nano Dimension bought it in April 2025, and in May 2026 agreed to sell it to Stratasys.
Founded:
2013 ·
Headquarters:
Waltham, Massachusetts, US ·
Ownership:
Subsidiary of Nano Dimension since April 2025; sale to Stratasys agreed in May 2026, still pending in August 2026 ·
Website:markforged.com
Closed by design: proprietary firmware, Markforged-only materials and cloud slicing, for industrial buyers who want one supported, secure system.
Firmware and custom firmware ●●●●●
Closed firmware, updated over the air through Eiger; no source is published and no custom firmware is supported.
[2]
Local control and integrations ●●●●●
Markforged printers are sliced and run through Eiger, its cloud software, by default, and Eiger is the only slicer they accept. Sites that cannot use the cloud can pay for Offline Eiger, which works over USB or a private network. APIs for linking other enterprise systems come with Eiger Fleet, a paid cloud subscription. We found no local interface for other software.
[2][6][16]
Third-party filament, slicers and parts ●●●●●
Markforged printers use only Markforged materials (Onyx, continuous fibres, metals) and only Eiger for slicing.
[2][3]
Repairs and spare parts ●●●●●
Replacement print heads, extruders and nozzle parts are sold through Markforged resellers, mostly as assemblies (a Mark Two print head lists at over 1,400 pounds), and some come free under service ('Success') plans.
[13][14]
Data and privacy ●●●●●
Eiger accounts hold your parts library and print jobs on AWS, encrypted, with two-factor login and ISO 27001 certification, and the privacy policy says what is collected. Offline Eiger keeps the data on site.
[4][5][2][6]
Pros
Prints parts reinforced with continuous carbon fibre, Kevlar or fibreglass, strong enough to replace some machined parts.
One supported system: printers, materials and software from one company, with ISO 27001 certification.
Offline Eiger available for sites that cannot use the cloud.
The FX10 prints both composites and metal.
Cons
Only Markforged materials and the Eiger slicer; no third-party filament.
Cloud first: the offline option is a separate subscription.
Ownership in flux: bought by Nano Dimension in 2025, with a sale to Stratasys pending in 2026.
Layoffs in 2023 and a $25 million patent settlement in 2024.
Track record
May 27, 2026: Stratasys agreed to buy MarkForged, Inc. from Nano Dimension for $42.5 million in cash; Nano Dimension keeps the metal binder jetting line. Closing was expected in the second half of 2026, and Stratasys still called it pending in August 2026.
[9][10]
April 25, 2025: Nano Dimension completed its acquisition of Markforged, valued at $116 million ($5.00 per share).
[8]
September 2024: Markforged settled Continuous Composites' patent suit, filed in 2021, by agreeing to pay $25 million over four years, with cross-licences; neither side admitted liability.
[11][12]
April 2024: A Delaware jury found that Markforged infringed a Continuous Composites patent on continuous-fibre printing; Markforged attempted to appeal before settling.
[12]
November 2023: Markforged announced a restructuring, mostly an approximately 10% headcount reduction, citing continuing economic headwinds.
[7]
September 2022: Markforged said its Offline Eiger subscription, which runs fully offline, had received a year of quarterly updates with the same materials and features as the cloud version.
[6]
Researched from 16 sources, last checked October 18, 2026. Show sources
Is the Markforged Onyx Pro compatible with SimplyPrint?
Not yet. The maker's software would allow SimplyPrint to connect to the Markforged Onyx Pro, but we haven't built it.
What slicer should I use for the Markforged Onyx Pro?
The Markforged Onyx Pro prints only from Markforged's own slicer, Eiger, so none of the slicers in SimplyPrint's cloud can slice for it.
What filament can the Markforged Onyx Pro print?
Markforged lists PLA, TPU & flexibles, Nylon (PA) and Carbon-fiber & glass-filled for the Onyx Pro. It prints only Markforged's own materials.
What is the Markforged Onyx Pro's bed size and build volume?
The Markforged Onyx Pro has a 320 x 132 mm print bed and prints up to 154 mm tall, a build volume of about 320 x 132 x 154 mm. See the full specifications table above for bed type, temperatures and more.
When did the Markforged Onyx Pro come out?
Markforged launched the Onyx Pro in November 2016.
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