Head to head · Prices checked Nov 11, 2026

Redragon Horus K621 vs Keychron K3 V3

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

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Battery

from$59at Redragon

Hot-swappable

from$84at MK

Quick verdict

Which one should you get?

Get the

Redragon Horus K621

Battery

Build quality in the bottom 10% of 80% boards under $100.

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.
No numpad.

$59 at Redragon

Get the

Keychron K3 V3

Hot-swappable

Build quality in the top 10% of 75% boards under $100.

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.
No numpad.

$84 at MK

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 V3

Layout size
80%
75%
Connection
Bluetooth, 2.4 GHz, Wired
Bluetooth, Wired
Wireless for several devices and wired for lower latency
Hot-swappable
No
Yes
Switch changes without soldering
Battery
1,900 mAh
1,550 mAh
A larger battery means fewer cables during the day
Case material
Plastic
ABS, Aluminum

KeebFinder scores

How we score

Redragon Horus K621
Keychron K3 V3

Performance: 72
82
Build quality: 45
83
Productivity: 47
80
Customizability: 46
89
Portability: 61
77

What they share

Low profile
Switch options: Clicky, Linear, Tactile

See every spec side by side

Full specs

Redragon Horus K621 vs Keychron K3 V3 specs

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

15 of 25 specs differ

Spec

Redragon Horus K621

Keychron K3 V3

Typing & switches

Switch options

Clicky, Linear, Tactile

Hot-swappable

Yes

Mount style

Bottom Mount

PCB Mount, Plate Mount, Top Mount

Low profile

Yes

Layout

Layout size

80%

75%

Layout standard

ANSI

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

Ergonomics

Standard

Display

None

Media keys

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

Yes

Build & materials

Case material

Plastic

ABS, Aluminum

Plate material

—

Aluminum

Keycaps

—

ABS, PBT

Weight

600 g

540 g

Dimensions

—

19 x 306 x 116 mm

Typing angle

—

3°

Backlight

RGB

RGB, north-facing

Firmware & software

QMK

Yes

VIA

Yes

N-key rollover

Yes

Mac & Windows

Yes

Extras

Released

2021

2024

For EU buyers

ISO layouts by store

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

Redragon Horus K621

No ISO layout at the stores we track.

Keychron K3 V3

Keychron
ISO-DE, ISO-UK, ISO-Nordic, ISO-SW
In 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.

Redragon Horus K6212 stores