💡 Pick it for enterprise-grade compliance, Outlook integration, and broader collaboration features.
Microsoft Exchange is a popular email and calendaring server solution by Microsoft.
Starting from $4 per user/month
Best Hexamail Flow Alternatives ranked by AI · updated Aug 2026
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Hexamail Flow is a Windows-based email server and collaboration platform for organizations that need hosted mailboxes, SMTP, POP3, IMAP, webmail, and calendaring. It combines mail delivery with filtering, archiving, anti-spam controls, and shared communication features.
Top 6 Hexamail Flow alternatives
💡 Pick it for a fuller Windows collaboration suite with a free entry tier.
SmarterMail is a feature-rich mail server software that comes with a variety of collaboration and communication tools.
Starting from $15 per mailbox
💡 Pick it when you need a low-cost Windows mail server with a genuinely free core edition.
Mail server software for Microsoft Windows. Provides email, calendaring, and collaboration features.
Starting from $349
4
MDaemon
MDaemon Technologies
💡 Pick it for mature Windows administration, strong security controls, and on-premises email management.
MDaemon is a Windows-based email and collaboration server for small businesses, enterprises, and service providers. It offers SMTP, IMAP, webmail, calendaring, contacts,...
Pros
- Mature Windows mail-server platform with extensive administrative controls
- Strong anti-spam, antivirus, archiving, and policy-management features
- Supports collaboration and mobile access without requiring Microsoft 365
Cons
- Commercial licensing is less attractive for very small teams
- Windows-only deployment increases infrastructure dependency
- Administration is more involved than hosted email services
Paid license; pricing varies by users and edition
💡 Pick it for a Linux-based, open-source-oriented collaboration suite with self-hosting flexibility.
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
💡 Pick it for a flexible Windows or Linux mail server with business collaboration features and a small free tier.
Axigen is a mail server software that offers secure and reliable email communication for businesses of all sizes. It provides features such...
Starting from $95 per year
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