Microsoft Outlook alternatives · Email
Self-hosted alternatives to Microsoft Outlook
The Microsoft Outlook listing does not say it can be self-hosted. 6 of the 73 other email apps in this directory can be self-hosted, according to their own sites.
Microsoft Outlook has a free plan. Paid plans start at $1.99 per month, or $19.99 per year (Microsoft 365 Basic). 4 of them are free or have a free plan.
6 tools · Listings checked up to Nov 12, 2026 · Where the facts come from
How each one differs from Microsoft Outlook
- Paid
Zimbra
Self-hosted email, calendar and file sharing for organizations
- Microsoft Outlook has a free plan. Zimbra does not.
- Only Zimbra lists a Linux app.
- Zimbra is open source and self-hostable, according to its own site.
- Microsoft Outlook also covers inbox filtering.
- Free trial · from $18/mo
Inbox Zero
Open source AI email assistant for Gmail and Outlook
- Inbox Zero starts at $18 per user / month, billed annually ($20 billed monthly). Microsoft Outlook starts at $1.99 per month, or $19.99 per year (Microsoft 365 Basic).
- Microsoft Outlook has a free plan. Inbox Zero does not, though it has a free trial.
- Only Inbox Zero lists a browser extension.
- Inbox Zero is open source and self-hostable, according to its own site.
- Free plan · from $20/mo
Zero Mail
Open-source AI email client that connects your existing inboxes
- Zero Mail starts at $20 per month (billing basis not shown). Microsoft Outlook starts at $1.99 per month, or $19.99 per year (Microsoft 365 Basic).
- Only Microsoft Outlook lists Windows, macOS, iOS and Android apps.
- Zero Mail is open source and self-hostable, according to its own site.
- Microsoft Outlook also covers tasks and calendar.
- Free
Roundcube
Free open-source webmail client you host yourself
- Roundcube is free. Microsoft Outlook starts at $1.99 per month, or $19.99 per year (Microsoft 365 Basic).
- Only Microsoft Outlook lists Windows, macOS, iOS and Android apps.
- Roundcube is open source and self-hostable, according to its own site.
- Microsoft Outlook also covers tasks, calendar and inbox filtering.
- Free plan · from $36/yr
SimpleLogin
Open-source email aliases that forward to your own inbox
- SimpleLogin starts at $36 per year ($4 billed monthly). Microsoft Outlook starts at $1.99 per month, or $19.99 per year (Microsoft 365 Basic).
- Only SimpleLogin lists a browser extension.
- Only Microsoft Outlook lists Windows and macOS apps.
- SimpleLogin is open source and self-hostable, according to its own site.
- Free plan · from $1/mo
addy.io
Email alias forwarding that hides your real address from sites
- addy.io starts at $1 per month, billed yearly (Lite). Microsoft Outlook starts at $1.99 per month, or $19.99 per year (Microsoft 365 Basic).
- Only addy.io lists a browser extension.
- Only Microsoft Outlook lists Windows and macOS apps.
- addy.io is open source and self-hostable, according to its own site.
Common questions
Is there a self-hosted alternative to Microsoft Outlook?
Yes. Zimbra, Inbox Zero, Zero Mail, Roundcube, SimpleLogin and addy.io can be self-hosted, according to their own sites.
Can Microsoft Outlook be self-hosted?
The Microsoft Outlook listing does not say it can be self-hosted. The listing was checked on Oct 9, 2026 against the pages it cites.
Which of these email apps are free?
Zero Mail, Roundcube, SimpleLogin and addy.io are free or have a free plan.
When was this checked?
Each listing shows its own date. On this page they run from Oct 9, 2026 to Nov 12, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.
This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Microsoft Outlook: the alternatives its listing names first, then the tools that share the most features with it.