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Head to head · Prices checked Nov 2, 2026

Azio Cascade Slim vs Keychron K3 Ultra

Get the Azio Cascade Slim for the 4,000 mAh battery. Get the Keychron K3 Ultra for qmk and via.

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Quick verdict

Which one should you get?

Get the

Azio Cascade Slim

Battery

Build quality in the top 25% 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.

Get the

Keychron K3 Ultra

QMK

Build quality in the top 25% 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.

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.

Azio Cascade Slim

Keychron K3 Ultra

  • Battery

    4,000 mAh

    2,600 mAh

    A larger battery means fewer cables during the day

  • Case material

    Aluminum

    ABS, Wood

  • QMK

    No

    Yes

    The deep option when you want to remap every key

  • VIA

    No

    Yes

    GUI remapping without compiling firmware

  • Layout standard

    ANSI

    ANSI, ISO

    ISO and JIS exist so regional layouts fit

KeebFinder scores

How we score
  • Azio Cascade Slim
  • Keychron K3 Ultra
Performance
76
86
Build quality
74
75
Productivity
87
89
Customizability
79
86
Portability
81
82

What they share

  • Layout size: 75%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Low profile
  • Switch options: Clicky, Linear, Tactile
  • Sound dampening
See every spec side by side

Full specs

Azio Cascade Slim 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

Azio Cascade Slim

Keychron K3 Ultra

Typing & switches

Switch options

Clicky, Linear, Tactile
Clicky, Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

—
Plate Mount

Low profile

Yes
Yes

Sound dampening

Yes
Yes

Screw-in stabilizers

Yes
No

Layout

Layout size

75%
75%

Layout standard

ANSI
ANSI, ISO

Ergonomics

Standard
Standard

Display

None
None

Connectivity & battery

Connection

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

Max polling rate

—
8,000 Hz

Battery

4,000 mAhBetter
2,600 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
ABS, Wood

Plate material

Aluminum
Aluminum

Keycaps

ABS
PBT

Weight

1,111 g
—

Dimensions

41 x 126 x 27 mm
—

Backlight

RGB
RGB, north-facing

Firmware & software

QMK

No
Yes

VIA

No
Yes

N-key rollover

Yes
No

Mac & Windows

Yes
Yes

Extras

Released

2022
2026

For EU buyers

ISO layouts by store

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

Azio Cascade Slim

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.

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