Mail-in-a-Box provides a full stack mail server solution with webmail and contacts. It enables easy mail hosting and management.
Best Poste.io Alternatives ranked by AI · updated May 2025
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Poste.io is a complete mail server solution with a modern web interface, spam filter, calendar, and contacts.
Price: Starting at $19/month
🎯 poste.io
Top 6 Poste.io alternatives
Zimbra is an enterprise-class email, calendar, and collaboration solution built for the cloud, both public and private.
Starting at $6 per mailbox per year
Open-Xchange is a cloud-based collaboration software with email, calendar, and file sharing.
Pros
- Cloud-based
- Integration with third-party apps
Cons
- Limited customization
- Higher cost for full feature set
Subscription-based pricing
ProtonMail is an end-to-end encrypted email service based in Switzerland.
Free tier available, premium plans starting at $5/month
Google Workspace is a suite of cloud computing, productivity and collaboration tools, software and products developed by Google.
Starting from $6/user/month
iRedMail is a full-featured mail server solution that supports email services like SMTP, IMAP, POP3, and webmail.
Free and Paid versions available
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