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Head to head · Prices checked Nov 1, 2026

Cidoo Nebula vs Ktechs Rainy75

Get the Cidoo Nebula for hot-swappable and knob. Get the Ktechs Rainy75 for the 3,500 mAh battery.

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Quick verdict

Which one should you get?

Get the

Cidoo Nebula

Hot-swappable

Build quality in the bottom 45% of 65% boards under $100.

Rules this board out

  • 65% layout. No function row and no numpad.
$55 at Mechkeys

Get the

Ktechs Rainy75

Battery

Build quality in the bottom 30% of 75% boards under $50.

Rules this board out

  • Switches are soldered. Swapping them means soldering.
  • No numpad.
$7 at ktechs

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.

Cidoo Nebula

Ktechs Rainy75

  • Layout size

    65%

    75%

  • Connection

    Bluetooth, 2.4 GHz, Wired

    Wireless

    Wireless for several devices and wired for lower latency

  • Hot-swappable

    Yes

    No

    Switch changes without soldering

  • Battery

    3,000 mAh

    3,500 mAh

    A larger battery means fewer cables during the day

  • Knob

    Yes

    No

KeebFinder scores

How we score
  • Cidoo Nebula
  • Ktechs Rainy75
Performance
48
47
Build quality
62
65
Productivity
73
46
Customizability
85
42
Portability
88
74

What they share

  • Mount style: Gasket Mount
See every spec side by side

Full specs

Cidoo Nebula vs Ktechs Rainy75 specs

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

11 of 19 specs differ

Cidoo Nebula

Ktechs Rainy75

Typing & switches

Hot-swappable

Yes
No

Mount style

Gasket Mount
Gasket Mount

Layout

Layout size

65%
75%

Layout standard

ANSI
—

Ergonomics

Standard
Standard

Knob

Yes
No

Display

None
LED

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired
Wireless

Max polling rate

—
1,000 Hz

Battery

3,000 mAh
3,500 mAhBetter

USB-C

Yes
No

Build & materials

Case material

ABS
—

Plate material

—
FR4, Plastic, Polycarbonate

Weight

457 g
—

Dimensions

35 x 120 x 325 mm
—

Backlight

RGB
None

Firmware & software

VIA

Yes
No

Mac & Windows

Yes
No

Extras

Released

2023
2024

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.

Cidoo Nebula2 stores
Ktechs Rainy752 stores

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