clones of

OpenMailClient

Clone of Outlook

Free clean-room email program that works like classic Outlook: ribbon, folder pane, message list and reading pane, and it opens your .pst files.

Screenshot of OpenMailClient

Image: OpenMailClient

What works the same as Outlook

  • Outlook's classic window: ribbon, folder pane, message list grouped by date and reading pane.
  • Opens .pst and .ost data files, and the .pst files it saves open in Outlook. Saves messages as .msg, .oft or .eml.
  • Calendar with day, work week, week and month views.
  • Tasks and the To-Do List, with flagged mail beside your tasks.
  • Brings in your accounts and data files from Outlook without changing them.

What is missing

  • No Mac version yet.
  • No sign-in with Microsoft or Google accounts yet: mail accounts use a password.

How to get started

  1. Click Download and pick the installer for Windows or the package for Linux.
  2. Windows may ask whether to run the installer, because it is not signed yet. Choose More info, then Run anyway.
  3. Open it and add your mail accounts, or bring them in from Outlook.

Compatible files

Outlook files (.pst, .ost, .msg) According to the project

Other Outlook clones

View project page
Project created in October 2026. Data from version v0.1.0-alpha.2, November 7, 2026.