Our widely adopted open source CNC controller GRBL used to be licensed under the LGPL which is a strict license somtimes dismissed as being “viral” as it requires all software that build on GRBL to also be open source.

Lately we have been approached by a number of actors wanting to use GRBL in projects that for business reasons are hard to fully open source. To allow even wider adoption, the contributors have opted to re-licence all of it under the permissive MIT-license which essentially allows the repurposing of GRBL for any use whatsoever.

The only thing we kindly ask in return is that due credit is given.

A special thanks to current lead developer Sonny Jeon for his impeccable stewardship.