KeebFinder
Not sure which keyboard to choose? Try the Keyboard Finder now!

Compare Keychron K3 vs K3 Ultra Differences Side by Side

This comparison is for buyers deciding between the standard Keychron K3 and the newer K3 Ultra, both ultra-slim 75% low-profile mechanical keyboards. The decision is hard because both share a compact layout and low-profile design, but they target different priorities: the K3 is a well-established wireless option with Bluetooth, while the K3 Ultra introduces an 8K polling rate, 2.4 GHz connectivity, ZMK firmware, a wood-and-metal frame, and a much larger battery. The K3 Ultra costs more but delivers features that strongly appeal to competitive gamers and customization enthusiasts.

65
Keychron K3 Ultra-slim Wireless Mechanical Keyboard FR-ISO Layout
78
Keychron K3 Ultra 8K Wireless Custom Mechanical Keyboard

Select a keyboard to compare

0.0 (0)
0.0 (0)
  • Released in 2023
  • Has Tactile, Linear, Clicky switch options
  • Built with the ISO-FR, ISO, ANSI layout standard
  • Provides dedicated media keys
  • Connects via USB-C
  • Uses a Plate Mount mounting style
  • Supports Bluetooth, Wired, Wireless connectivity
  • Equipped with a 1550 mAh battery
  • Made with a Aluminum, ABS case
  • Features PBT, ABS keycaps
  • Offers Yes, Rgb, White, North-face, Rgb North-face RGB lighting
  • Released in 2026
  • Has Linear, Tactile, Clicky switch options
  • Built with the ANSI, ISO layout standard
  • Supports QMK firmware
  • Supports VIA configuration
  • Supports Bluetooth, 2.4 GHz, Wired, Wireless connectivity
  • Runs at a 8000 Hz polling rate
  • Features PBT keycaps
  • Offers Yes, Rgb RGB lighting
Scores
  • Performance: 62.8
  • Build Quality: 61.7
  • Productivity: 66.7
  • Customizability: 69.5
  • Portability: 78.2
Scores
  • Performance: 86.6
  • Build Quality: 69.2
  • Productivity: 70
  • Customizability: 86.5
  • Portability: 74.6
Name
Keychron K3
Name
Keychron K3 Ultra
Release year
2023
Release year
2026
Switch Options
Tactile, Linear, Clicky
Switch Options
Linear, Tactile, Clicky
Profile
Low Profile
Profile
Low Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
75%
Layout Size
75%
Layout Standard
ISO-FR, ISO, ANSI
Layout Standard
ANSI, ISO
Layout Ergonomics
Normal
Layout Ergonomics
Normal
Knob Support
 
Knob Support
 
Display Support
 
Display Support
 
Mac/Win Support
 
Mac/Win Support
 
Multi-Media Keys
 
Multi-Media Keys
 
USB-C
 
USB-C
 
USB passthrough
 
USB passthrough
 
Connection
Bluetooth, Wired, Wireless
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate
-
Polling Rate
8000 Hz
Battery capacity
1550 mAh
Battery capacity
-
Hall Effect Support
 
Hall Effect Support
 
QMK Support
 
QMK Support
 
VIA Support
 
VIA Support
 
VIAL Support
 
VIAL Support
 
N-Key Rollover
 
N-Key Rollover
 
Rapid Trigger
 
Rapid Trigger
 
Mount Style
Plate Mount
Mount Style
-
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb, White, North-face
Backlight
 
Rgb
Case Colors
Case Colors
Case Material
Aluminum, ABS
Case Material
-
Keycaps Material
PBT, ABS
Keycaps Material
PBT
Dimensions
-
Dimensions
-
Weight
-
Weight
-
*Something incorrect or missing? Please
let me know
!

Pros and Trade-offs

If your primary concern is competitive gaming latency or you want deep firmware-level customization, the K3 Ultra is the clear choice with its 8K polling rate, 2.4 GHz, and ZMK support. For everyday typing, frequent travel, or a lower upfront investment, the standard K3 remains a capable and proven low-profile wireless keyboard. The decision ultimately hinges on whether you need the Ultra's performance extras or prefer the K3's simplicity and value.

Keychron K3

  • +Lower price, making it a more budget-friendly entry into low-profile mechanical keyboards
  • +Lightweight construction with aluminum and ABS materials for easy portability
  • +Comes with 17 extra keycaps and a dust cover in the box for added value
  • +Supports both white and RGB backlight options, including static white
  • −Lower 62.7 performance score, lacking ultra-low latency features like 2.4 GHz or 8000 Hz polling
  • −Plastic plate and limited foam (no IXPE or EPDM) may result in a less refined typing sound
  • −Only 1550 mAh battery, offering up to 34 hours of backlight use

Keychron K3 Ultra

  • +8000 Hz polling rate in 2.4 GHz and wired modes for competitive gaming responsiveness
  • +ZMK firmware with Launcher web app for full key remapping and macro customization
  • +Interior acoustic foam (IXPE and EPDM) for dampened, quieter keystrokes
  • +2600 mAh battery providing up to 550 hours of battery life with backlight off
  • −Higher cost compared to the standard K3, making it less accessible for budget shoppers
  • −Heavier at 566 g, partly due to the wood-and-metal frame and larger battery

Which Keyboard Is Better for Your Needs?

The K3 Ultra wins in gaming, programming, modding, and content creation thanks to its 8K polling rate, 2.4 GHz connectivity, ZMK firmware, and robust foam layering. The standard K3 takes the lead for travel due to its lighter build and lower cost. For general office use, both keyboards perform equally well, offering Bluetooth, a compact 75% layout, and low-profile design. The K3 Ultra's larger battery and customizable firmware give it a clear edge for power users who value performance and flexibility.

GamingKeychron K3 Ultra
  • •8000 Hz polling rate in 2.4 GHz and wired modes for ultra-low latency
  • •2.4 GHz wireless connectivity for a stable, interference-free connection
  • •Powerful ARM core with dedicated MCU for faster processing
OfficeTie
  • •Both feature a compact 75% layout that saves desk space
  • •Both support Bluetooth and wired connections, though the K3 Ultra also adds 2.4 GHz
  • •Both offer Mac/Win support and low-profile design for comfortable typing
ProgrammingKeychron K3 Ultra
  • •ZMK firmware with QMK-like key remapping for custom layers and macros
  • •Per-key RGB and mix RGB for visual coding cues
  • •LSA double-shot PBT keycaps with oil resistance for long use
TravelKeychron K3
  • •Lighter weight due to aluminum and ABS construction without additional foam layers
  • •Smaller 1550 mAh battery still offers up to 34 hours of use
  • •Lower cost makes it less risky to carry around
ModdingKeychron K3 Ultra
  • •ZMK firmware allows extensive keymap, macro, and lighting customization
  • •Multiple interior foam options (IXPE, EPDM, bottom case acoustic foam) for sound tuning
  • •Hot-swappable Keychron Milk POM switches with pre-lubed POM/POK materials
  • •Per-key and mix RGB lighting for creative lighting effects
Content CreationKeychron K3 Ultra
  • •ZMK firmware enables custom shortcuts for creative workflows
  • •Larger 2600 mAh battery with up to 550 hours of battery life for extended sessions
  • •3-way connectivity (2.4 GHz, Bluetooth 5.2, wired) for multi-device setups

Frequently Asked Questions (FAQ)

Discover similar products

You might also like similar products in that price range:

87
$83
Keychron K3 Pro QMK/VIA Wireless Mechanical Keyboard ISO Layout Collection
Keychron K3 Pro
75%,
Hotswap,
Wireless,
Wired,
RGB/ White LEDs,
VIA,
QMK,
Alu case,
Tray Mount

83
$94
Keychron K3 QMK Wireless Mechanical Keyboard (ISO Layout) - Version 3
Keychron K3 V3
75%,
Hotswap,
Wireless,
Wired,
RGB/ White LEDs,
VIA,
QMK,
Alu case,
Top Mount

94
$84
Keychron K3 Max QMK/VIA Wireless Custom Mechanical Keyboard ISO Layout Collection
Keychron K3 Max
75%,
Hotswap,
Wireless,
Wired,
RGB/ White LEDs,
VIA,
QMK,
Alu case,
Plate Mount

68
$96
Keychron K3 Ultra-slim Wireless Mechanical Keyboard (Version 2)
Keychron K3 V2
75%,
Hotswap,
Wireless,
Wired,
RGB/ White LEDs,
Alu case,
Tray Mount

86
$67
Keychron K1 Pro QMK/VIA Wireless Custom Mechanical Keyboard ISO Layout Collection
Keychron K1 Pro
80%,
Hotswap,
Wireless,
Wired,
RGB/ White LEDs,
VIA,
QMK,
Alu case,
Tray Mount

83
$104
Keychron K3 Max SE QMK Wireless Custom Mechanical Keyboard
Keychron K3 Max SE
75%,
Hotswap,
Wireless,
Wired,
RGB/ White LEDs,
VIA,
QMK

87
$67
Keychron K13 Pro QMK/VIA Wireless Custom Mechanical Keyboard ISO Layout Collection
Keychron K13 Pro
80%,
Hotswap,
Wireless,
Wired,
RGB/ White LEDs,
VIA,
QMK,
Alu case,
Tray Mount

85
$106
Keychron K1 Max QMK Wireless Custom Mechanical Keyboard ISO Layout Collection
Keychron K1 Max
80%,
Hotswap,
Wireless,
Wired,
RGB/ White LEDs,
VIA,
QMK,
Alu case,
PCB Mount

84
$83
Keychron K7 Pro QMK/VIA Wireless Custom Mechanical Keyboard ISO Layout Collection
Keychron K7 Pro
65%,
Hotswap,
Wireless,
Wired,
RGB/ White LEDs,
VIA,
QMK,
Alu case,
Tray Mount

84
$94
Keychron K1 QMK Wireless Mechanical Keyboard (ISO Layout) - Version 6
Keychron K1 V6
80%,
Hotswap,
Wireless,
Wired,
RGB/ White LEDs,
VIA,
QMK,
Alu case,
Top Mount