Postaci Alternatives

Web-based IMAP email client

Open Source

Horde Groupware is a free, enterprise ready, browser based collaboration suite.

VoIPstudio is an award-winning VoIP system that offers businesses of all sizes a scalable communication solution. It’s inexpensive, easy-to-use, offers a full suite of PBX features, and is fully integrated for CRM.

Try for free paid Free Trial $4.99 / Monthly (User)

RainLoop is a web based email client.

Open Source

SquirrelMail is a standards-based webmail package written in PHP.

Open Source

Save time and scale faster with accessible, secure, and reliable cloud email services. A proven multitenant email solution for telcos and service providers.

freemium $1.3 / Monthly (Per mailbox)

A fully fledged, free email server solution, an open source project (GPL v2).

Open Source

Open Source WebMail Lite is a free community edition of full-featured WebMail Pro server applicatio...

All your E-mail, from all your accounts, in one place. Cypht is like a news reader, but for E-mail.

Open Source

Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.

Open Source

NOCC is a webmail client written in PHP. It provides webmail access to IMAP and POP3 accounts.

Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.

NeoMail is a web-based mail client that allows users to access their mail spools and send messages.

Secure email with absolutely no compromises. Get your free encrypted email account today.

freemium €5.0 / Monthly (user - 5 GB)