roundcube/roundcubemail

Health v2 · maintenance only

Adoption not part of the score

7131 stars · 1774 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Roundcube Webmail is a browser-based, multilingual IMAP email client written in PHP with an application-like user interface. It offers full webmail functionality including MIME/HTML message support, address books with LDAP connectors, folder management, message searching, spell checking, and an extensible plugin API with customizable skins.

Use cases

• self-host a webmail interface for an existing IMAP/SMTP mail server
• give users browser-based access to their email without installing a desktop client
• provide a multilingual webmail UI in over 80 languages
• extend webmail with custom plugins via the plugin API
• customize the webmail look and feel with skins
• add PGP-encrypted email reading and sending in the browser

When to choose

• you already run an IMAP/SMTP mail server and need a web frontend
• you want a mature, self-hosted webmail solution on a standard LAMP stack
• you need a customizable, plugin-extensible webmail client
• you want an open-source alternative to proprietary webmail like Gmail or Outlook Web

When to avoid

• you need a full mail server (Roundcube is only a client, not an MTA/IMAP server)
• you want an email client for a desktop or mobile device rather than the browser
• your stack is not PHP-based and you prefer not to run PHP on a web server
• you need offline email access

Facets

application · maturity stable

email http-server search-engine plugin-system caching security email self-hosted web-development privacy self-hosted php webmail imap-client email-client php skins address-book pgp-encryption smtp web-server linux

Member repositories

For agents

markdown · JSON · MCP: product_card(name="roundcube/roundcubemail")