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Head to head · Prices checked Oct 21, 2026

Redragon Horus K621 vs Keychron K3 QMK V3

Get the Redragon Horus K621 for the 1,900 mAh battery. Get the Keychron K3 QMK V3 for hall effect and hot-swappable.

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.

Redragon Horus K621

Keychron K3 QMK V3

  • Layout size

    80%

    75%

  • Hall effect (magnetic)

    No

    Yes

  • Connection

    Bluetooth, 2.4 GHz, Wired

    Bluetooth, Wired

  • Hot-swappable

    No

    Yes

  • Battery

    1,900 mAh

    1,550 mAh

KeebFinder scores

How we score
  • Redragon Horus K621
  • Keychron K3 QMK V3
Performance
73
85
Build quality
45
71
Productivity
47
74
Customizability
46
78
Portability
60
77

What they share

  • Low profile
See every spec side by side

Full specs

Redragon Horus K621 vs Keychron K3 QMK V3 specs

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

16 of 24 specs differ

Redragon Horus K621

Keychron K3 QMK V3

Typing & switches

Switch options

Clicky, Linear, Tactile
Linear, Tactile

Hall effect (magnetic)

No
Yes

Hot-swappable

No
Yes

Mount style

Bottom Mount
Plate Mount

Low profile

Yes
Yes

Layout

Layout size

80%
75%

Layout standard

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

Ergonomics

Standard
Standard

Display

None
None

Media keys

No
Yes

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired
Bluetooth, Wired

Max polling rate

—
1,000 Hz

Battery

1,900 mAhBetter
1,550 mAh

USB-C

No
Yes

Build & materials

Case material

Plastic
ABS, Aluminum

Plate material

—
Aluminum

Keycaps

—
ABS

Weight

600 g
540 g

Dimensions

—
19 x 306 x 116 mm

Backlight

RGB
RGB, north-facing

Firmware & software

QMK

No
Yes

N-key rollover

Yes
Yes

Mac & Windows

No
Yes

Extras

Released

2021
2024

Where to buy

Compare prices

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

Lowest price across stores, Amazon excluded.

  • AmazonGlobal

    Check price
    ~$59Visit
  • RedragonCN

    Out of stock
    $59Visit
  • MKUS

    In stock
    $84Visit
  • Keychron (DE)DE

    In stock
    $110Visit
  • AmazonGlobal

    Check price
    ~$84Visit

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