Here is a short comparison of the all 4 shells and their properties.

What are different types of shell in Linux?

Shell Types

• Bourne shell (sh)
• Korn shell (ksh)
• Bourne Again shell (bash)
• POSIX shell (sh)

How many shells are there in Unix?

Nearly every Unix system has these two shells installed, but may also have several others: bash , ksh , tcsh , and zsh .