Keychron B3 Pro vs K3 Max: Low-Profile 75% Showdown

Compare Keychron B3 Pro vs K3 Max Differences Side by Side

This comparison is for buyers seeking a low-profile 75% mechanical keyboard who are torn between value and extensive features. The Keychron B3 Pro offers an accessible entry point with essential wireless connectivity in a very lightweight package, while the K3 Max justifies its higher price with hot-swappable switches, QMK firmware support, and a more diverse material selection. The decision is hard because you must weigh the B3 Pro's superior portability against the K3 Max's significantly greater customization and build options. Both keyboards share the same core layout and wireless capability, but their intended audiences diverge sharply.

Model
Rating	0.0 stars (0 reviews)	4.7 stars (9 reviews)
Purchase Options
Main differences	Released in 2025 Has Linear, Tactile, Clicky switch options Built with the ANSI layout standard Equipped with a 1200 mAh battery Weighs about 410 g Sized at 3 x 100 x 380 mm Made with a ABS case Features ABS keycaps Offers No RGB lighting	Released in 2023 Has Tactile, Linear, Clicky switch options Supports hot-swappable switches Built with the ISO, ISO-UK, ISO-DE, ISO-Nordic, ISO-SW, ANSI layout standard Supports QMK firmware Supports VIA configuration Features N-key rollover Includes screw-in stabilizers Has built-in sound dampening Uses a Plate Mount mounting style Equipped with a 1550 mAh battery Weighs about 580 g Sized at 22 x 306 x 116 mm Made with a ABS, Aluminum, Wood, Plastic case Features PBT, ABS keycaps Offers Yes, Rgb, White, North-face, Rgb North-face, White North-face RGB lighting
Score	Scores Performance: 48.5 Build Quality: 42.4 Productivity: 66.9 Customizability: 46 Portability: 78.2	Scores Performance: 80.9 Build Quality: 86.4 Productivity: 94.3 Customizability: 92.2 Portability: 77.2
Name	Name Keychron B3 Pro	Name Keychron K3 Max
Release year	Release year 2025	Release year 2023
Switch Options	Switch Options Linear, Tactile, Clicky	Switch Options Tactile, Linear, Clicky
Profile	Profile Low Profile	Profile Low Profile
Hot Swappable	Hot Swappable	Hot Swappable
Layout Size	Layout Size 75%	Layout Size 75%
Layout Standard	Layout Standard ANSI	Layout Standard ISO, ISO-UK, ISO-DE, ISO-Nordic, ISO-SW, ANSI
Layout Ergonomics	Layout Ergonomics Normal	Layout Ergonomics Normal
Knob Support	Knob Support	Knob Support
Display Support	Display Support	Display Support
Mac/Win Support	Mac/Win Support	Mac/Win Support
Multi-Media Keys	Multi-Media Keys	Multi-Media Keys
USB-C	USB-C	USB-C
USB passthrough	USB passthrough	USB passthrough
Connection	Connection Bluetooth, 2.4 GHz, Wired, Wireless	Connection Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate	Polling Rate 1000 Hz	Polling Rate 1000 Hz
Battery capacity	Battery capacity 1200 mAh	Battery capacity 1550 mAh
Hall Effect Support	Hall Effect Support	Hall Effect Support
QMK Support	QMK Support	QMK Support
VIA Support	VIA Support	VIA Support
VIAL Support	VIAL Support	VIAL Support
N-Key Rollover	N-Key Rollover	N-Key Rollover
Rapid Trigger	Rapid Trigger	Rapid Trigger
Mount Style	Mount Style -	Mount Style Plate Mount
Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers
Sound Dampening	Sound Dampening	Sound Dampening
Backlight	Backlight	Backlight Rgb, White, North-face
Case Colors	Case Colors	Case Colors
Case Material	Case Material ABS	Case Material ABS, Aluminum, Wood, Plastic
Keycaps Material	Keycaps Material ABS	Keycaps Material PBT, ABS
Dimensions	Dimensions 3 x 100 x 380 mm	Dimensions 22 x 306 x 116 mm
Weight	Weight 410g	Weight 580g

Keychron B3 Pro Ultra-Slim Wireless Keyboard

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0.0 stars (0 reviews)

4.7 stars (9 reviews)

Released in 2025
Has Linear, Tactile, Clicky switch options
Built with the ANSI layout standard
Equipped with a 1200 mAh battery
Weighs about 410 g
Sized at 3 x 100 x 380 mm
Made with a ABS case
Features ABS keycaps
Offers No RGB lighting

Released in 2023
Has Tactile, Linear, Clicky switch options
Supports hot-swappable switches
Built with the ISO, ISO-UK, ISO-DE, ISO-Nordic, ISO-SW, ANSI layout standard
Supports QMK firmware
Supports VIA configuration
Features N-key rollover
Includes screw-in stabilizers
Has built-in sound dampening
Uses a Plate Mount mounting style
Equipped with a 1550 mAh battery
Weighs about 580 g
Sized at 22 x 306 x 116 mm
Made with a ABS, Aluminum, Wood, Plastic case
Features PBT, ABS keycaps
Offers Yes, Rgb, White, North-face, Rgb North-face, White North-face RGB lighting

Scores

Performance: 48.5
Build Quality: 42.4
Productivity: 66.9
Customizability: 46
Portability: 78.2

Scores

Performance: 80.9
Build Quality: 86.4
Productivity: 94.3
Customizability: 92.2
Portability: 77.2

Name

Keychron B3 Pro

Name

Keychron K3 Max

Release year

2025

Release year

2023

Switch Options

Linear, Tactile, Clicky

Switch Options

Tactile, Linear, Clicky

Profile

Low Profile

Profile

Low Profile

Hot Swappable

Layout Size

75%

Layout Size

75%

Layout Standard

ANSI

Layout Standard

ISO, ISO-UK, ISO-DE, ISO-Nordic, ISO-SW, ANSI

Layout Ergonomics

Normal

Layout Ergonomics

Normal

Knob Support

Display Support

Mac/Win Support

Multi-Media Keys

USB-C

USB passthrough

Connection

Bluetooth, 2.4 GHz, Wired, Wireless

Connection

Bluetooth, 2.4 GHz, Wired, Wireless

Polling Rate

1000 Hz

Polling Rate

1000 Hz

Battery capacity

1200 mAh

Battery capacity

1550 mAh

Hall Effect Support

QMK Support

VIA Support

VIAL Support

N-Key Rollover

Rapid Trigger

Mount Style

Plate Mount

Screw in Stabilizers

Sound Dampening

Backlight

Rgb, White, North-face

Case Colors

Case Material

ABS

Case Material

ABS, Aluminum, Wood, Plastic

Keycaps Material

ABS

Keycaps Material

PBT, ABS

Dimensions

3 x 100 x 380 mm

Dimensions

22 x 306 x 116 mm

Weight

410g

Weight

580g

Pros and Trade-offs

The decision hinges on what you value more: a low price and ultra-light travel companion, or a feature-rich platform for customization. For most users seeking a long-term keyboard, the Keychron K3 Max is the superior choice, offering hot-swappable switches and powerful QMK support. Only choose the Keychron B3 Pro if your absolute top priorities are a lower budget and an exceptionally lightweight keyboard for on-the-go use.

Keychron B3 Pro

+Significantly lighter at 410g, making it highly portable.
+Includes a protective silicone key skin for the keyboard.
+Has a dedicated 2.4 GHz receiver storage slot in the keyboard body.
+More budget-friendly price range compared to the K3 Max.

−No hot-swappable switch support, limiting customization options.
−Does not feature any per-key or background RGB lighting.
−Lacks the advanced QMK/VIA firmware support for deep customization.
−The ABS keycap material is less durable and more prone to shine than PBT.

Keychron K3 Max

+Supports hot-swappable switches (on select versions) for easy customization.
+Features advanced QMK and VIA firmware support for key remapping and macros.
+Comes with durable double-shot PBT keycaps as standard.
+Offers a wide range of case materials (including aluminum and wood) and plate choices.

−Heavier at 580g, which is less ideal for frequent travel.
−Has a higher price point compared to the budget-oriented B3 Pro.
−No dedicated onboard storage slot for the 2.4 GHz wireless receiver.

Which Keyboard Is Better for Your Needs?

The Keychron K3 Max dominates in 5 of the 6 use cases, including Gaming, Office, Programming, Modding, and Content Creation. Its edge comes from a combination of hot-swappable switches, QMK/VIA firmware support, and a wider choice of materials like aluminum frames and PBT keycaps. The Keychron B3 Pro wins only in the Travel category, where its lighter weight, lower profile, and included silicone skin give it a clear portability advantage. For users who prioritize customization and features, the K3 Max is the clear choice, while those focused on a budget-friendly, light travel keyboard will prefer the B3 Pro.

GamingKeychron K3 Max

•The K3 Max includes hot-swappable switches and a choice between RGB or white backlight options for a personalized gaming setup.
•The vendor description for the K3 Max mentions interior acoustic foam (IXPE and latex) for a better typing and gaming sound profile.
•The K3 Max offers more robust build options with materials like an aluminum frame, which can provide better stability.

OfficeKeychron K3 Max

•The K3 Max has dedicated QMK and VIA support, allowing for extensive macro creation and key remapping to optimize workflow.
•It includes interior acoustic foam (IXPE and latex) for quieter keystrokes, which is beneficial in shared workspaces.
•The K3 Max features screw-in stabilizers and redesigned stabilizers for less wobble on larger keys, improving typing feel.

ProgrammingKeychron K3 Max

•Full QMK and VIA support on the K3 Max allows for powerful custom layers and shortcuts, highly valuable for coding.
•The K3 Max offers multiple case materials (ABS, Aluminum, Wood, Plastic) and plate materials, providing a tailored typing feel.
•It comes with double-shot PBT keycaps, which are more durable and resistant to shine over time compared to ABS keycaps.

TravelKeychron B3 Pro

•The B3 Pro weighs only 410g, making it significantly lighter than the 580g K3 Max, which is easier to carry in a bag.
•The B3 Pro includes a dedicated silicone key skin for protection against spills and dust during travel.
•Its 2.4 GHz receiver stores in a slot on the keyboard itself, preventing loss while on the move.

ModdingKeychron K3 Max

•The K3 Max offers a hot-swappable version, allowing switch changes without soldering, a key feature for modding.
•It supports advanced QMK firmware, which the B3 Pro does not, offering deeper customization for firmware enthusiasts.
•The K3 Max has diverse build materials (aluminum, wood, polycarbonate plate) that allow for different acoustic and aesthetic modding paths.

Content CreationKeychron K3 Max

•The K3 Max's 22+ RGB backlight settings, including per-key and mix RGB options, can add visual flair to a creator's setup.
•The robust QMK/VIA support enables creating custom macros for video editing or design software shortcuts.
•The included double-shot PBT keycaps and redesigned stabilizers offer a more premium typing experience for long editing sessions.

Frequently Asked Questions (FAQ)