Olkb.com can probably answer most questions you have. They where one of the first to bring ortholinear keyboards to the market. Planck and Preonic are models they make. Preonic has a number row, planck doesn’t. MNT is a company making open and hackable devices like laptops, they aren’t making devices for the masses, instead trying to make something that is longer lasting and repairable. Their ‘pocket’ model has an ortholinear keyboard built in, and I just think that’s neat.