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Head-to-head · Command-Line Shells

Zsh vs OpenBSD KornShell (ksh)

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Zsh #2 in Command-Line Shells 8.8/10 Free plan Free plan✓ 2 of 3 features Visit Zsh
OpenBSD KornShell (ksh) #6 in Command-Line Shells 8.1/10 Free plan Free plan✓ 2 of 3 features Visit site

Zsh leads on 0 checks, OpenBSD KornShell (ksh) on 0, and 3 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreZsh · 8.8/10
  • Free planboth

Zsh scores higher on our rubric for command-line shells: 8.8 against 8.1 out of 10; our editors rank them #2 and #6.

Zsh is the better fit for users who want advanced Unix shell customization. OpenBSD KornShell (ksh) is the better fit for openBSD users preferring KornShell-style scripting.

  • Zsh fits best

    Users who want advanced Unix shell customization

  • OpenBSD KornShell (ksh) fits best

    OpenBSD users preferring KornShell-style scripting

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. How we rank.

Side by side

Feature Zsh 8.8/10 Visit ↗ OpenBSD KornShell (ksh) 8.1/10 Visit ↗
At a glance
Editor score 8.8 8.1
Ranking #2 in Command-Line Shells #6 in Command-Line Shells
Best for Users who want advanced Unix shell customization OpenBSD users preferring KornShell-style scripting
Pricing model Free Free
Starting price Not published Not published
Free plan ✓ ✓
Free trial — —
Support Community, Docs Docs
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Zsh 2/3 · OpenBSD KornShell (ksh) 2/3
Package manager Not published Not published
Config file support ✓ ✓
Command completion ✓ ✓
Specs
Supported platforms Unix; Windows via Cygwin OpenBSD
Scripting language Zsh shell scripting language KornShell language (superset of sh)
Our review
Pros
  • Programmable completion and multi-line command editing
  • Advanced filename globbing, arrays, arithmetic, and spelling correction
  • Customizable prompts and options through startup files
  • Combines interactive command use with a language superset of sh.
  • Includes arrays, functions, arithmetic expansion, and job control.
  • Offers vi or Emacs editing plus command and file-name completion.
Cons
  • Windows support is through Cygwin rather than a standalone current port
  • Requires compiling from source on modern Unix systems
  • Community and documentation are the listed support channels
  • Its listed supported platform is limited to OpenBSD.
  • Its command language may not suit users seeking another shell style.
  • Documentation is the listed support channel.
Our verdict

Zsh is a freely available command interpreter designed for interactive use and scripting. It suits people who want to tailor a Unix command-line environment, from individual users to teams across company sizes. Its shell scripting language…

Read the review →

OpenBSD KornShell (ksh) is the OpenBSD Project's command interpreter for interactive sessions and shell scripts. It is aimed at people who want KornShell-style scripting alongside command-line work in an OpenBSD environment. Its language…

Read the review →
  1. ZshCommand-Line Shells 8.8Free plan
  2. OpenBSD KornShell (ksh)Command-Line Shells 8.1Free plan

Strengths and trade-offs

  • Zsh — where it wins

    • Programmable completion and multi-line command editing
    • Advanced filename globbing, arrays, arithmetic, and spelling correction
    • Customizable prompts and options through startup files

    Where it doesn't

    • Windows support is through Cygwin rather than a standalone current port
    • Requires compiling from source on modern Unix systems
    • Community and documentation are the listed support channels

  • OpenBSD KornShell (ksh) — where it wins

    • Combines interactive command use with a language superset of sh.
    • Includes arrays, functions, arithmetic expansion, and job control.
    • Offers vi or Emacs editing plus command and file-name completion.

    Where it doesn't

    • Its listed supported platform is limited to OpenBSD.
    • Its command language may not suit users seeking another shell style.
    • Documentation is the listed support channel.
  • Zsh8.8/10 · Free plan

    A free, customizable shell for users who want advanced command-line control.

    Visit ZshFull verdict →
  • OpenBSD KornShell (ksh)8.1/10 · Free plan

    OpenBSD ksh pairs KornShell scripting with interactive editing and completion on OpenBSD.

    Visit siteFull verdict →

More comparisons

All Command-Line shells comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update