hMail Server is described as 'hMailServer is a free e-mail server for Microsoft Windows. Its used by Internet service providers, companies, governments, schools and enthusiasts in all parts of the world' and is a Mail Server in the office & productivity category. There are more than 25 alternatives to hMail Server for a variety of platforms, including Linux, Windows, Self-Hosted solutions, Mac and BSD. The best alternative is Roundcube, which is both free and Open Source. Other great apps like hMail Server are mailcow: dockerized, Mail-in-a-box, Dovecot and iRedMail.
hMail Server is mainly a Mail Server but alternatives to it may also be WebMail Providers or Email Clients. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of hMail Server.
Roundcube webmail is a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an e-mail client, including MIME support, address book, folder manipulation, message searching and spell checking.
Roundcube vs hMail Server opinions
This alternative is disputed. Roundcube is still a legitimate alternative to hMail Server, but it might have issues that some users think are important.
Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft. It is part of the Microsoft Servers line of server products and is widely used by enterprises using Microsoft infrastructure solutions.
Low cost, easy to use Email Server software for virtual, on-premise, or hosted deployments for companies that want control of their email. Integrated web-mail with doc sharing, Drop Box integration, client and server side encryption.
Axigen provides a multi-tenant, fully integrated, multi-platform, all-in-one email, calendaring and collaboration messaging solution.
It grants extensive branding options and is localized in over 29 languages (including right-to-left writing mode).