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Head to head · Prices checked Nov 11, 2026

Keychron B3 Pro vs K3 Max

Choose the K3 Max for its hot-swap capability and robust features, or the B3 Pro if your priority is a lower price point and an ultra-light build.

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Quick verdict

Which one should you get?

Get the

Keychron B3 Pro

Build quality in the bottom 5% of 75% boards under $50.

If you want

  • 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.

Rules this board out

  • Switches are soldered. Swapping them means soldering.
  • Low-profile switches and keycaps only. Standard MX keycaps will not fit.
  • No ISO layout. ISO-DE, UK, and other ISO variants are not offered.

Get the

Keychron K3 Max

Hot-swappable

Build quality in the top 5% of 75% boards under $100.

If you want

  • 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.

Rules this board out

  • Low-profile switches and keycaps only. Standard MX keycaps will not fit.
  • North-facing LEDs. Cherry-profile keycaps can hit the switch housing.

Bottom line

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.

What actually differs

The differences that matter

Skip the 40-row spec sheet. These are the specs that change how each board feels, sounds, and fits your desk.

Keychron B3 Pro

Keychron K3 Max

  • Hot-swappable

    No

    Yes

    Switch changes without soldering

  • Battery

    1,200 mAh

    1,550 mAh

    A larger battery means fewer cables during the day

  • Case material

    ABS

    ABS, Aluminum, Plastic, Wood

  • Weight

    410 g

    580 g

    Heavier boards stay planted and lighter ones travel

  • QMK

    No

    Yes

    The deep option when you want to remap every key

KeebFinder scores

How we score
  • Keychron B3 Pro
  • Keychron K3 Max
Performance
50
81
Build quality
43
86
Productivity
70
94
Customizability
47
91
Portability
79
77

What they share

  • Layout size: 75%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Low profile
  • Max polling rate: 1,000 Hz
  • Switch options: Clicky, Linear, Tactile
See every spec side by side

Best for

What will you mostly use it for?

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.

For gaming

Pick the Keychron 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.

Full specs

Keychron B3 Pro vs K3 Max specs

Every tracked spec, side by side. Rows marked with a dot differ between the boards.

15 of 27 specs differ

Keychron B3 Pro

Keychron K3 Max

Typing & switches

Switch options

Clicky, Linear, Tactile
Clicky, Linear, Tactile

Hot-swappable

No
Yes

Mount style

—
Plate Mount

Low profile

Yes
Yes

Sound dampening

No
Yes

Screw-in stabilizers

No
Yes

Layout

Layout size

75%
75%

Layout standard

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

Ergonomics

Standard
Standard

Display

None
None

Media keys

Yes
Yes

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired
Bluetooth, 2.4 GHz, Wired

Max polling rate

1,000 Hz
1,000 Hz

Battery

1,200 mAh
1,550 mAhBetter

USB-C

Yes
Yes

Build & materials

Case material

ABS
ABS, Aluminum, Plastic, Wood

Plate material

—
Aluminum, Plastic, Polycarbonate

Keycaps

ABS
ABS, PBT

Weight

410 g
580 g

Dimensions

3 x 100 x 380 mm
22 x 306 x 116 mm

Typing angle

3°
3°, 7°

Backlight

None
RGB, north-facing

Firmware & software

QMK

No
Yes

VIA

No
Yes

N-key rollover

No
Yes

Mac & Windows

Yes
Yes

Extras

Released

2025
2023

For EU buyers

ISO layouts by store

Which stores sell ISO-DE, UK, and the other regional layouts.

Keychron B3 Pro

No ISO layout at the stores we track.

Keychron K3 Max

  • Input Gear

    ISO-DE

    Out of stockShips to you

  • Keychron

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

    Out of stockShips to you

  • Keychron (DE)

    ISO-DE, ISO-UK, ISO-SW

    In stockDoes not ship to you

Where to buy

Compare prices

Live prices from the stores we track, cheapest in-stock offer first.

Prices in USD are converted to your currency and can change at any time. KeebFinder may earn a commission when you buy through these links, at no extra cost to you.

Lowest price across stores, Amazon excluded.

FAQ

Keychron B3 Pro vs K3 Max: your questions

Yes, but the hot-swappable feature is optional and available only on specific versions of the K3 Max. The vendor explicitly notes that the hot-swappable compatibility is currently limited to Gateron and Keychron low-profile mechanical switches, not optical ones.

The vendor description for the K3 Max does not specify battery life duration. The B3 Pro is described as having an 800mAh battery that can provide up to 300 hours of continuous use, though its metadata lists a 1200mAh battery. The K3 Max's metadata lists a higher capacity 1550mAh battery, but its actual runtime is not provided.

The B3 Pro has a 1000 Hz polling rate in 2.4 GHz mode, which is suitable for gaming. However, it lacks features common in gaming keyboards, such as per-key RGB lighting and hot-swappable switches, and it does not have dedicated gaming software beyond the Keychron Launcher web app.

Yes, the K3 Max is explicitly described as a QMK/VIA wireless custom mechanical keyboard. The vendor highlights that its open-source QMK firmware allows for extensive key remapping, macros, and shortcuts, and it can be configured with the Keychron Launcher web app.

The B3 Pro has an ABS case and ABS keycaps. The K3 Max offers a wider selection, with case materials including ABS, Aluminum, Wood, and Plastic, and it comes with double-shot PBT keycaps, which are generally more durable and resistant to wear than ABS.

The B3 Pro is better for travel. It is significantly lighter at 410g compared to the K3 Max's 580g, it includes a protective silicone key skin, and it has a dedicated storage slot for the 2.4 GHz receiver, making it easier to transport without losing parts.

The provided vendor description for the B3 Pro does not list a keycap or switch puller in the box contents. Since it is a pre-built keyboard without hot-swap support, such tools are generally not needed for standard use.

The K3 Max features redesigned screw-in stabilizers. The vendor claims these have been improved to stay level with the switches and provide less wobble on larger keys like the space bar, left Shift, backspace, and Enter key.

Yes, both keyboards support multi-device connectivity. The B3 Pro uses Bluetooth 5.2, while the K3 Max uses Bluetooth 5.1. Both allow you to switch between devices like a computer, phone, and tablet, though the specific number of devices is not explicitly stated in the provided data.

Yes, the K3 Max offers multiple backlight options, including RGB and white backlight versions. The vendor describes 22+ RGB backlight settings with per-key and mix RGB capabilities, plus a static white option.

The B3 Pro has a fixed typing angle. The vendor states it has a tilt angle of 2.8 degrees and an ultra-thin integrated body of 9.2mm thickness. In contrast, the K3 Max offers three levels of adjustable typing angle.

Yes, both the Keychron B3 Pro and K3 Max are designed with Mac/Win support. The vendor states both offer a Mac layout while remaining compatible with Windows, and they include keycaps for both macOS and Windows, along with additional esc and enter keys.

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