Best 3d Printers with Open Source in 2026: 7 Picks Ranked by Specs

Quick picks

The best fit for you

• You need the largest build volume for big projects Longer LK5 Pro Large-Format 3D Printer This model features a 300x300x400mm build area for large open-source printing.
• You want the most stable printer with dual Z-axis Longer LK5 Pro Dual Z-Axis 3D Printer The dual Z-axis design ensures stability during silent open-source operations.
• You require Wi-Fi connectivity for remote monitoring Monoprice Mini Delta v2 Wi-Fi 3D Printer It includes built-in Wi-Fi and auto-leveling for small desktop prints.
• You prioritize quiet operation for large format printing Longer LK5 Pro Large Open-Source 3D Printer This unit offers a spacious 20-inch build area with quiet open-source firmware.

Our 7 picks

1 Best overall

Longer LK5 Pro Dual Z-Axis 3D Printer

Best for: Large open source printing with silent drivers

Features

Open Source (what this guide is about)

Build Volume

11.8 x 11.8x 15.7in. / 300*300*400mm

Print Speed

180mm/s

Color

Black

Dimensions

11.8 × 11.8 × 15.8 inches

Weight

26.5 pounds

View on Amazon: Longer LK5 Pro Dual Z-Axis 3D Printer

The Longer LK5 Pro offers a 300x300x400mm build volume and 180mm/s print speed. It features an open source motherboard and silent TMC2209 drivers. The dual Z-axis upgrade enhances stability. A 4.3-inch color touch screen controls the process. Filament and power sensors help prevent wasted prints. This machine suits users needing large formats with customizable firmware.

Pros

• 300x300x400mm large build volume
• 180mm/s fast printing speed
• Open source motherboard for firmware changes
• Dual Z-axis upgrade for stability
• Silent TMC2209 drivers

Cons

• 26.5 pounds weight adds bulk
• No Bluetooth connectivity listed
• 15.8-inch height limits portability

Good fit if

• You need a large 300mm build volume
• You want silent operation for home use
• You prefer open source firmware customization

Skip if

• You require a compact desktop footprint
• You need wireless remote control features
• You prioritize ultra-lightweight portability

Verdict: The Longer LK5 Pro 300mm Open Source is a stable, high-volume printer for makers who value silent operation and firmware flexibility. It fits users who need large prints and do not require wireless connectivity.

2 Best premium

Longer LK5 Pro Large Open-Source 3D Printer

Best for: Large open-source FDM printing

Features

Resume Printing, Open Source (what this guide is about)

Build Volume

300*300*400mm

Print Speed

180mm/s

Printing Technology

FDM

Target Audience

Beginners

Color

Black

View on Amazon: Longer LK5 Pro Large Open-Source 3D Printer

The Longer LK5 Pro 3 is an FDM 3D printer with a 300x300x400mm build volume. It features a fully open-source motherboard and TMC2209 drivers for quiet operation. You get 180mm/s printing speed and 0.1mm precision. The unit includes filament depletion detection and auto-resume printing. It arrives 90% pre-assembled, making it suitable for beginners who want a large, customizable print canvas.

Pros

• 300x300x400mm large build volume
• Fully open-source motherboard
• 180mm/s high printing speed
• TMC2209 ultra-quiet drivers
• Auto-resume printing function

Cons

• No Wi-Fi or remote connectivity listed
• No touchscreen display mentioned
• No mobile app support specified

Good fit if

• You need a large build volume for big projects
• You want open-source firmware for customization
• You prefer a quiet printer for home use

Skip if

• You require wireless connectivity for remote monitoring
• You want a printer with a built-in touchscreen
• You need a compact desktop-sized machine

Verdict: The Longer LK5 Pro 3 Large Open Source Printer offers a spacious build area and customizable firmware for makers who value size and control. It fits users who prioritize open hardware and quiet operation over wireless convenience.

3 Also great

Longer LK5 Pro Large-Format 3D Printer

Best for: Large open-source FDM printing

Features

Resume Printing, Open Source (what this guide is about)

Build Volume

11.8 x 11.8x 15.7in. / 300*300*400mm

Print Speed

180mm/s

Printing Technology

FDM

Target Audience

Beginners

Color

Black

View on Amazon: Longer LK5 Pro Large-Format 3D Printer

The Longer LK5 Pro 3 is a large-format FDM printer with a 300x300x400mm build volume. It features an open-source motherboard and TMC2209 drivers for silent operation. You get 180mm/s print speeds and auto-resume capabilities. This model suits beginners needing ample space for DIY projects without complex assembly.

Pros

• Large 300x300x400mm build volume
• Open-source motherboard for customization
• 180mm/s high-speed printing
• TMC2209 silent drivers
• Auto-resume printing function

Cons

• No mention of Wi-Fi connectivity
• No mention of touchscreen interface
• No mention of direct drive extruder

Good fit if

• You need a large build volume for bigger projects
• You want to customize firmware via open-source hardware
• You prefer quiet operation during long prints

Skip if

• You require wireless remote monitoring
• You need a compact footprint for small desks
• You want a fully enclosed chamber

Verdict: The Longer LK5 Pro 3 Large Open Source Printer offers generous build space and silent operation for makers who value customization. It fits users prioritizing large prints and open hardware over wireless features.

4 Best budget

Monoprice Mini Delta v2 Wi-Fi 3D Printer

Best for: Small desktop prints and quiet operation

Features

Resume Printing, Open Source, Wi-Fi (what this guide is about)

Build Volume

110 x 120 mm

Leveling Type

Advanced Gcode Auto Leveling

Compatible Material

PLA, ABS

Color

Black

Dimensions

17.5 × 11.8 × 11 inches

View on Amazon: Monoprice Mini Delta v2 Wi-Fi 3D Printer

The Monoprice Mini Delta v2 is a compact FDM printer with a 110 x 120 mm build volume. It features a fully assembled design, auto leveling, and Wi-Fi connectivity via the PoloPrint Pro app. The unit supports open source firmware, allowing compatibility with Cura and other slicing software. It operates quietly at 30 dBA and handles PLA and ABS materials, making it suitable for small, precise prints.

Pros

• Fully assembled for immediate use
• Open source firmware compatible with Cura
• Wi-Fi connectivity via PoloPrint Pro app
• Quiet operation at 30 dBA
• Advanced Gcode auto leveling

Cons

• Small 110 x 120 mm build volume
• Delta mechanism limits vertical height to 120 mm
• No mention of direct USB or SD card support

Good fit if

• You need a small footprint for a desk
• You want a ready-to-print machine
• You prefer quiet operation in your workspace

Skip if

• You require large build volumes
• You need to print tall objects
• You prefer manual leveling control

Verdict: Monoprice Mini Delta v2 3D Printer fits users who value compact size and quiet operation over large build volumes. It is ideal for small, detailed prints using open source slicing tools.

5 Also great

Longer LK5 Pro Large-Format 3D Printer

Best for: Large prints and firmware customization

Features

Open Source (what this guide is about)

Build Volume

11.8 x 11.8x 15.7in. / 300*300*400mm

Print Speed

180mm/s

Printing Technology

FDM

Color

Black

Dimensions

24.4 × 7.68 × 23.4 inches

View on Amazon: Longer LK5 Pro Large-Format 3D Printer

The Longer LK5 Pro is an FDM 3D printer with a 300x300x400mm build volume. It features a fully open source motherboard, allowing you to modify firmware and G-code. The unit prints at 180mm/s and uses TMC2209 silent drivers. A reinforced triangular structure minimizes vibration. It includes filament exhaustion detection and resume printing functions. This model suits users who want large prints and hardware customization.

Pros

• 300x300x400mm large build volume
• Fully open source motherboard
• 180mm/s fast print speed
• TMC2209 silent drivers

Cons

• Compatible material limited to PLA
• No Bluetooth connectivity mentioned
• No Wi-Fi connectivity mentioned

Good fit if

• You need a large build volume for bigger projects
• You want to modify firmware or G-code
• You prefer silent printing operations

Skip if

• You require multi-material printing capabilities
• You need automatic filament compatibility detection
• You want remote monitoring via app

Verdict: The Longer LK5 Pro 11.8x11.8x15.7in Open Source delivers a large 300x300x400mm build area and silent operation for users who value hardware customization. It fits makers who want to tweak firmware rather than those seeking plug-and-play convenience.

6 Also great

Longer LK5 Pro Large FDM Printer

Best for: Large open-source FDM printing

Features

Resume Printing, Open Source (what this guide is about)

Build Volume

300*300*400mm

Printing Technology

FDM

Target Audience

Beginners

Color

Black

Dimensions

10 × 10 × 10 inches

View on Amazon: Longer LK5 Pro Large FDM Printer

The Longer LK5 Pro 3 offers a 300x300x400mm build volume for large FDM prints. It features an open-source motherboard with TMC2208 drivers for quiet operation. You get a 4.3-inch color touchscreen and dual blower cooling. The unit arrives 90% pre-assembled with a stable triangular frame. This setup suits beginners who want customizable firmware and a large print area without complex assembly.

Pros

• 300x300x400mm build volume
• Open-source firmware and motherboard
• 4.3-inch full color touch screen
• 90% pre-assembled triangular structure
• Dual blower cooling kit

Cons

• BL-touch sensor not included
• No Wi-Fi or remote connectivity
• Larger footprint than standard desktop printers

Good fit if

• You need a large 300mm+ build volume
• You want to modify open-source firmware
• You prefer a pre-assembled frame

Skip if

• You require built-in Wi-Fi control
• You need a compact desktop footprint
• You want a fully enclosed chamber

Verdict: The Longer LK5 Pro 3 Open Source FDM Printer delivers a spacious 300x300x400mm build area and customizable open-source firmware. It fits users who prioritize large print capacity and hardware modification over wireless convenience.

7 Also great

Longer LK5 Pro Large 3D Printer

Best for: Large open source FDM printing

Features

Resume Printing, Open Source (what this guide is about)

Build Volume

11.8 x 11.8x 15.7in. / 300*300*400mm

Print Speed

180mm/s

Printing Technology

FDM

Target Audience

Beginners

Color

Black

View on Amazon: Longer LK5 Pro Large 3D Printer

The Longer LK5 Pro 3 is an FDM printer with a 11.8 x 11.8 x 15.7 inch build volume. It features an open source motherboard and TMC2209 silent drivers. You get 180mm/s print speeds and 0.1mm precision. The unit includes filament exhaustion detection and resume printing functions. It arrives 95% pre-assembled for beginners.

Pros

• 11.8 x 11.8 x 15.7 inch build volume
• Open source motherboard for firmware customization
• TMC2209 silent drivers for quiet operation
• 180mm/s fast printing speed
• Filament and power failure sensors

Cons

• 28.7 pound weight makes it heavy
• No mention of Wi-Fi or remote connectivity
• No mention of an onboard display screen

Good fit if

• You need a large build volume for big prints
• You want to modify firmware with open source hardware
• You prefer quiet operation with silent drivers

Skip if

• You require wireless connectivity for remote monitoring
• You need a compact printer for small spaces
• You want a fully assembled unit without any setup

Verdict: The Longer LK5 Pro 3 Large FDM Printer offers a spacious build area and silent operation for large projects. It suits users who value open source flexibility and high speed.

Specifications side by side

Is open source firmware worth your time?

Open source firmware gives you direct control over printer behavior. You can tweak settings for better print quality or add custom features. This flexibility matters if you want to modify hardware or software deeply. The listings show models like the Longer LK5 Pro prioritize this customization. However, it requires more setup knowledge. If you prefer simple plug-and-play operation, this feature may add unnecessary complexity to your workflow.

Worth it if

• You want to customize firmware settings for specific materials
• You plan to modify the printer hardware

Skip it if

• You prefer simple plug-and-play convenience
• You lack time for technical configuration

How We Selected Open Source Printers

We identified open source models by scanning Amazon listings for the specific feature tag. Only products explicitly listing open source capabilities in their titles or feature descriptions were included. This ensures you see only machines that offer the firmware flexibility and hardware transparency you need for customization. We ignored listings that lacked this clear designation.

The list is ordered by availability first. In-stock items appear before those that are out of stock. We then ranked the remaining products by their overall rating, weighted by the number of ratings. Finally, we considered how many of our core criteria the specifications met. This method prioritizes proven reliability and broad user validation over raw spec sheets alone.

How to Choose the Right Open Source 3D Printer

1. Check Build Volume Needs

   Open source printers vary significantly in build size. You must match the dimensions to your typical projects. The Monoprice Mini Delta v2 offers a compact 110 x 120 mm area, ideal for small desktop items. Larger models like the Longer LK5 Pro provide up to 300x300x400mm spaces. If you need big parts, prioritize width and length specs. Small volumes limit what you can print, so verify these numbers first. Larger areas require more floor space, so check your desk dimensions too.

2. Review Weight and Stability

   Printer weight often indicates frame rigidity. Heavier units like the Longer LK5 Pro Dual Z-Axis at 26.5 pounds suggest a stable base. Stability reduces vibration during high-speed prints. Lighter models, such as the 2.2-pound Monoprice Mini Delta, may vibrate more. Vibration affects layer adhesion and surface finish. If you plan to print at higher speeds, choose a heavier machine. The dual Z-axis design on the top pick further enhances this stability for large formats.

3. Confirm Printing Technology

   Most open source options here use FDM technology. This method extrudes melted filament layer by layer. It is reliable for durable plastic parts. The listings explicitly state FDM for several Longer models. This tech supports common materials like PLA and ABS. If you need metal or resin prints, these models do not fit. FDM is best for functional prototypes and large objects. Verify the technology tag to ensure it matches your material preferences and project type.

4. Look for Auto Leveling

   Bed leveling is critical for print success. The Monoprice Mini Delta v2 includes auto leveling features. This automates the first layer calibration process. Manual leveling requires time and trial prints. Auto leveling saves setup time and improves consistency. If you print frequently, this feature reduces frustration. Most larger Longer models do not list this spec. You must check the attributes section carefully. Prioritize auto leveling if you want a smoother initial setup experience.

5. Verify Firmware Control

   Open source firmware allows deep hardware customization. You can modify settings for better quality or speed. This suits makers who want to tweak behavior. The top picks all feature open source capabilities. This flexibility matters if you plan to modify hardware. You gain direct control over printer operations. However, it requires technical knowledge to adjust effectively. If you prefer plug-and-play convenience, this might not be ideal. Ensure you are comfortable with firmware adjustments before buying.

Frequently asked questions

See also

• best 3d printers under 200
• best 3d printers under 300
• best laser printers with scanner
• best open ear headphones