Keychron B3 Pro vs K2 MaxUltra-Slim vs Premium Build Comparison
Choose the K2 Max for a premium, customizable typing experience, or the B3 Pro for an ultra-portable, low-profile design at a lower cost.
KeebFinder may earn a commission when you buy through these links, at no extra cost to you.
No reviews
from$34at Keychron
4.5 (2)4.5 · 2 reviews
from$94at Keychron
Which one should you get?
Get the
Keychron B3 Pro
Ultra-Slim
Build quality in the bottom 5% of 75% boards under $50.
- Extremely lightweight at 410g and ultra-slim low-profile design.
- Includes a protective, washable silicone key skin according to the product listing.
- Has a dedicated storage slot for the 2.4 GHz wireless receiver.
- 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 K2 Max
Premium Build Comparison
Build quality in the top 10% of 75% boards under $100.
- Premium construction with an aluminum case, steel plate, and double-shot PBT keycaps.
- Fully hot-swappable with support for extensive switch customization.
- Features QMK/VIA firmware and multiple acoustic foam layers (IXPE, PET, EPDM) for sound tuning.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
Your budget and need for customization dictate the choice here. The Keychron K2 Max is a worthwhile investment for enthusiasts who want a durable, mod-friendly keyboard with a premium typing feel. The Keychron B3 Pro is a practical, budget-friendly pick for users who prioritize a sleek, portable design and do not plan on modifications.
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 K2 Max
Hot-swappable
No
Yes
Switch changes without soldering
Battery
1,200 mAh
4,000 mAh
A larger battery means fewer cables during the day
Low profile
Yes
No
Case material
ABS
ABS, Aluminum
Weight
410 g
940 g
Heavier boards stay planted and lighter ones travel
- Keychron B3 Pro
- Keychron K2 Max
- Performance
- 5081
- Build quality
- 4385
- Productivity
- 7095
- Customizability
- 4791
- Portability
- 7979
- Layout size: 75%
- Connection: Bluetooth, 2.4 GHz, Wired
- Max polling rate: 1,000 Hz
- Switch options: Clicky, Linear, Tactile
What will you mostly use it for?
The K2 Max is the clear choice for users focused on gaming, programming, modding, or content creation, thanks to its premium materials, extensive customization, and robust feature set. The B3 Pro wins for travel due to its lightweight, slim design. For general office use, both are competent, making the decision more about budget and preferred typing height.
Pick the Keychron K2 Max
- The K2 Max features a 1000 Hz polling rate on both wireless and wired modes, which the manufacturer states makes latency hardly noticeable.
- Its heavier 940g weight and steel plate provide more stability during intense use.
- South-facing RGB backlighting is included, which the vendor says avoids interference with Cherry-profile keycaps.
Keychron B3 Pro vs K2 Max specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
16 of 27 specs differ
Keychron B3 Pro
Keychron K2 Max
Switch options
Hot-swappable
Mount style
Low profile
Sound dampening
Screw-in stabilizers
Layout size
Layout standard
Ergonomics
Display
Media keys
Connection
Max polling rate
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Typing angle
Backlight
QMK
VIA
N-key rollover
Mac & Windows
Released
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 K2 Max
Keychron
ISO-DE, ISO-UK, ISO-Nordic, ISO-SW
In stockShips to you
Keychron (DE)
ISO-DE, ISO-UK, ISO-SW
Out of stockDoes not ship to you
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.
Keychron B3 Pro vs K2 Max: your questions
The K2 Max generally provides a better typing experience due to its PBT keycaps, steel plate, and multiple layers of sound-dampening foam (IXPE, PET, EPDM). The B3 Pro uses low-profile ABS keycaps and has a much slimmer build, which offers a different, more laptop-like feel.
No. The Keychron B3 Pro is not listed as hot-swappable in its specifications or vendor description. Its switches are soldered in place and cannot be easily changed by the user.
Yes. The K2 Max includes keycap sets and support for both macOS and Windows, according to the vendor. It features a system toggle switch to change between operating system layouts.
The specifications list a 1200mAh battery, but the vendor description claims an 800mAh battery capable of up to 300 hours of use. Actual battery life will depend on usage patterns and lighting, which the B3 Pro lacks.
Yes. The K2 Max has a 1000 Hz polling rate in its 2.4 GHz and wired modes, which Keychron states makes latency hardly noticeable. Its sturdy 940g build and N-key rollover also support reliable gaming performance.
The Keychron B3 Pro is far more portable. It weighs 410g compared to the K2 Max's 940g and features an ultra-slim, low-profile design that is easier to pack in a bag.
No. Only the Keychron K2 Max has RGB backlighting, specifically south-facing RGB. The Keychron B3 Pro does not have any backlighting according to its specifications.
Both keyboards can be programmed using the Keychron Launcher web app. However, the K2 Max offers deeper customization via open-source QMK and VIA firmware, which the B3 Pro does not support.
The K2 Max uses OSA-profile (spherical-angle) double-shot PBT keycaps. The B3 Pro uses low-profile, concave ABS keycaps, as described in its vendor listing.
The K2 Max has superior build quality on paper, featuring an aluminum case, steel plate, and PBT keycaps. The B3 Pro uses an ABS case and ABS keycaps, which are common in more budget-conscious designs.
The vendor description for the K2 Max mentions newly enhanced stabilizers with reinforced sidewalls for improved stability but does not specify if they come pre-lubricated from the factory.
The specifications and vendor description for the B3 Pro do not mention an included carrying case. It does include a protective silicone key skin.
Not sold on either?
Still torn?
Answer a few quick questions and the keyboard finder ranks 2,000+ boards by how you will actually use yours.