StartMail alternatives · Email
Self-hosted alternatives to StartMail
The StartMail listing does not say it can be self-hosted. 25 of the 125 other email apps in this directory can be self-hosted, according to their own sites.
StartMail is a paid product with a free trial, starting at $4.99 per month, billed annually ($59.88). 19 of them are free or have a free plan.
25 tools · Listings checked up to Nov 13, 2026 · Where the facts come from
The 12 closest to StartMail
- 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). StartMail starts at $4.99 per month, billed annually ($59.88).
- Only Inbox Zero lists macOS, Windows and iOS apps.
- 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). StartMail starts at $4.99 per month, billed annually ($59.88).
- Zero Mail has a free plan. StartMail does not, though it has a free trial.
- Only StartMail lists an Android app.
- Zero Mail is open source and self-hostable, according to its own site.
- Free
Cypht
Open-source webmail that combines many accounts in one inbox
- Cypht is free. StartMail starts at $4.99 per month, billed annually ($59.88).
- Cypht has a free plan. StartMail does not, though it has a free trial.
- Only StartMail lists an Android app.
- Cypht is open source and self-hostable, according to its own site.
- Paid
Zimbra
Self-hosted email, calendar and file sharing for organizations
- Only Zimbra lists Windows, macOS, Linux and iOS apps.
- Zimbra is open source and self-hostable, according to its own site.
- Zimbra also covers tasks and calendar.
- StartMail also covers inbox filtering.
- Free
Roundcube
Free open-source webmail client you host yourself
- Roundcube is free. StartMail starts at $4.99 per month, billed annually ($59.88).
- Roundcube has a free plan. StartMail does not, though it has a free trial.
- Only StartMail lists an Android app.
- Roundcube is open source and self-hostable, according to its own site.
- Free
SOGo
Open-source groupware with webmail, calendars and contacts
- SOGo is free. StartMail starts at $4.99 per month, billed annually ($59.88).
- SOGo has a free plan. StartMail does not, though it has a free trial.
- Only StartMail lists an Android app.
- SOGo is open source and self-hostable, according to its own site.
- Paid
Open-Xchange
OX App Suite email platform sold to providers and governments
- Only StartMail lists an Android app.
- Open-Xchange is open source and self-hostable, according to its own site.
- Open-Xchange also covers calendar.
- StartMail also covers inbox filtering.
- Free
Horde
Free open-source webmail, calendar, contacts and tasks suite
- Horde is free. StartMail starts at $4.99 per month, billed annually ($59.88).
- Horde has a free plan. StartMail does not, though it has a free trial.
- Only StartMail lists an Android app.
- Horde is open source and self-hostable, according to its own site.
- Free
mailcow
Dockerized open-source mail server with a web admin UI
- mailcow is free. StartMail starts at $4.99 per month, billed annually ($59.88).
- mailcow has a free plan. StartMail does not, though it has a free trial.
- Only StartMail lists an Android app.
- mailcow is open source and self-hostable, according to its own site.
- Free
Mail-in-a-Box
Free script that turns a cloud server into your own mail server
- Mail-in-a-Box is free. StartMail starts at $4.99 per month, billed annually ($59.88).
- Mail-in-a-Box has a free plan. StartMail does not, though it has a free trial.
- Only StartMail lists an Android app.
- Mail-in-a-Box is open source and self-hostable, according to its own site.
- Free plan · from $2.40/yr
Stalwart Mail Server
Open-source mail and collaboration server written in Rust
- Stalwart Mail Server starts at $2.40 per mailbox / year, billed annually (25-mailbox minimum). StartMail starts at $4.99 per month, billed annually ($59.88).
- Stalwart Mail Server has a free plan. StartMail does not, though it has a free trial.
- Only StartMail lists an Android app.
- Stalwart Mail Server is open source and self-hostable, according to its own site.
- Free
Mailu
Free Docker-based mail server with webmail and admin UI
- Mailu is free. StartMail starts at $4.99 per month, billed annually ($59.88).
- Mailu has a free plan. StartMail does not, though it has a free trial.
- Only StartMail lists an Android app.
- Mailu is open source and self-hostable, according to its own site.
Common questions
Is there a self-hosted alternative to StartMail?
Yes. Inbox Zero, Zero Mail, Cypht, Zimbra, Roundcube, SOGo, Open-Xchange, Horde and 17 more can be self-hosted, according to their own sites.
Can StartMail be self-hosted?
The StartMail listing does not say it can be self-hosted. The listing was checked on Oct 6, 2026 against the pages it cites.
Which of these email apps are free?
Zero Mail, Cypht, Roundcube, SOGo, Horde, mailcow, Mail-in-a-Box, Stalwart Mail Server and 11 more are free or have a free plan.
When was this checked?
Each listing shows its own date. On this page they run from Oct 6, 2026 to Nov 13, 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 StartMail: the alternatives its listing names first, then the tools that share the most features with it.