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Head to head · Prices checked Nov 7, 2026

Dygma Defy vs MMD KM40

Get the Dygma Defy for the 4,740 mAh battery. Get the MMD KM40 for qmk.

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Quick verdict

Which one should you get?

Get the

Dygma Defy

Battery

Get the

MMD KM40

QMK

Build quality in the top 10% of 40% boards under $150.

Rules this board out

  • Compact layout only. No function row, dedicated arrow keys, or numpad.

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.

Dygma Defy

MMD KM40

  • Battery

    4,740 mAh

    2,000 mAh

    A larger battery means fewer cables during the day

  • Case material

    Aluminum, Plastic

    Aluminum

  • Switch options

    Clicky, Linear, Silent, Tactile

    Linear, Tactile

  • Weight

    1,000 g

    620 g

    Heavier boards stay planted and lighter ones travel

  • QMK

    No

    Yes

    The deep option when you want to remap every key

KeebFinder scores

How we score
  • Dygma Defy
  • MMD KM40
Performance
82
61
Build quality
50
82
Productivity
75
69
Customizability
66
83
Portability
57
84

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
See every spec side by side

Full specs

Dygma Defy vs MMD KM40 specs

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

12 of 22 specs differ

Dygma Defy

MMD KM40

Typing & switches

Switch options

Clicky, Linear, Silent, Tactile
Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

—
Gasket Mount

Sound dampening

No
Yes

Layout

Layout size

—
40%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Display

None
None

Connectivity & battery

Connection

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

Battery

4,740 mAhBetter
2,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum, Plastic
Aluminum

Plate material

Aluminum
Polycarbonate

Keycaps

ABS, PBT
PBT

Weight

1,000 g
620 g

Dimensions

35 x 210 x 164 mm
—

Backlight

RGB
RGB

Firmware & software

QMK

No
Yes

VIA

No
Yes

N-key rollover

Yes
No

Mac & Windows

Yes
No

Extras

Released

2024
2026

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.

Dygma Defy2 stores
MMD KM402 stores

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