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Head to head · Prices checked Nov 11, 2026

Double shell DoubleShell DS84i vs Keychron K3 Ultra

Get the Double shell DoubleShell DS84i for knob. Get the Keychron K3 Ultra for qmk and via.

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Quick verdict

Which one should you get?

Get the

Double shell DoubleShell DS84i

Knob

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

Rules this board out

  • 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.
$99 at Mechkeys

Get the

Keychron K3 Ultra

QMK

Build quality in the top 30% of 75% boards under $150.

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.
$109 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.

Double shell DoubleShell DS84i

Keychron K3 Ultra

  • Switch options

    Linear, Tactile

    Clicky, Linear, Tactile

  • Knob

    Yes

    No

  • QMK

    No

    Yes

    The deep option when you want to remap every key

  • VIA

    No

    Yes

    GUI remapping without compiling firmware

  • Sound dampening

    No

    Yes

KeebFinder scores

How we score
  • Double shell DoubleShell DS84i
  • Keychron K3 Ultra
Performance
61
86
Build quality
40
75
Productivity
58
89
Customizability
59
86
Portability
74
82

What they share

  • Layout size: 75%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Low profile
  • Keycaps: PBT
See every spec side by side

Full specs

Double shell DoubleShell DS84i vs Keychron K3 Ultra specs

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

10 of 25 specs differ

Double shell DoubleShell DS84i

Keychron K3 Ultra

Typing & switches

Switch options

Linear, Tactile
Clicky, Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

—
Plate Mount

Low profile

Yes
Yes

Sound dampening

No
Yes

Layout

Layout size

75%
75%

Layout standard

ANSI
ANSI, ISO

Ergonomics

Standard
Standard

Knob

Yes
No

Display

None
None

Connectivity & battery

Connection

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

Max polling rate

—
8,000 Hz

Battery

—
2,600 mAh

USB-C

Yes
Yes

Build & materials

Case material

—
ABS, Wood

Plate material

—
Aluminum

Keycaps

PBT
PBT

Weight

798 g
—

Dimensions

25 x 153 x 314 mm
—

Backlight

RGB
RGB, north-facing

Firmware & software

QMK

No
Yes

VIA

No
Yes

N-key rollover

Yes
No

Mac & Windows

No
Yes

Extras

Released

2023
2026

For EU buyers

ISO layouts by store

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

Double shell DoubleShell DS84i

No ISO layout at the stores we track.

Keychron K3 Ultra

  • Keychron

    ISO

    In stockShips to you

  • Keychron (DE)

    ISO

    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.

Double shell DoubleShell DS84i2 stores
Keychron K3 Ultra4 stores

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