Exokernels are orthogonal to unikernels. Unikernels run exactly one application, but can be based on an arbitrarily complicated OS (specialised) to that one

Exokernels are orthogonal to unikernels. Unikernels run exactly one application, but can be based on an arbitrarily complicated OS (specialised) to that one application. Exokernels can run arbitrarily many applications, but OS functionality is minimal and limited to ensuring protection and multiplexing of resources. Specialising a rich OS (such as Linux) to a single application might yield OS functions that are as restricted as those you find in an exokernel.