Keyboards

foostan Corne

The Corne is foostan's open-source split keyboard with 3x6 column-staggered keys and three thumb keys per half; V4 puts an RP2040 on the PCB and has hot-swap sockets.

Key specs auto-matched against source pages · Last verified: 2026-10-18

foostan Corne
Image: © foostan (Manufacturer image)
Key layout
Image: QMK Firmware (Generated from QMK data (GPL-2.0))
~¥17,600

Where to buy

View at splitkb.com (Corne Cherry PCB kit, sold out)View at Lectronz (Trithemius MB, Corne Classic PCB set)Official site

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Pros

  • Fully split, column-staggered layout with thumb keys
  • V4 comes with the MCU and sockets already on the board, so you can build it without soldering
  • Offered in Cherry MX-compatible and Kailh Choc versions
  • Keymaps can be changed in a GUI through Remap or Vial

Cons

  • With only 42 keys you have to rely on layers
  • V4 has reported bugs where electromagnetic interference stops one or both halves from working
  • You have to supply your own switches and keycaps and assemble the kit yourself

Specs

SplitSplit
StaggerColumnar
TentingNone
KeywellNo
Thumb clusterYes
Keys42
LayoutsCustom
SwitchesMechanical
Hot-swapYes
FirmwareVial
DIY kitYes
ConnectivityUSB
OSwindows, macos, linux
Released—
Sources
AD · detail-mid

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