Roundcube
Roundcube provides free, open-source webmail software that organizations can host and customize.
About Roundcube
Roundcube is browser-based, multilingual IMAP client software written in PHP that organizations can host and customize. It includes MIME and HTML message support, address book management, folder manipulation, message searching, spell checking, multiple sender identities, and a plug-in API for extensions.
Key features
- Drag-and-drop message management
- MIME and HTML message support
- Multiple sender identities
- Address book with groups and LDAP connectors
- Threaded message listing
- Plug-in API for flexible extensions
Best for: Organizations that need to host and customize webmail for their users.
Good for
- Browser-based IMAP client with multilingual interface
- Responsive skin for use across devices
- Plug-in API for extensions
Roundcube at a glance
- Website
- roundcube.net
- Category
- Productivity › Email Tools
- Type
- Online tool
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Email Tools
Roundcube alternatives
Tools and sites you could use instead, ranked by how closely they match.
Spike organizes email messages and helps users sort their inbox and compose replies.
ExtractMailAddress finds and sorts email addresses, URLs, and phone numbers from text and document files.
Neural Newsletters helps users create and publish newsletters tailored to audience preferences.
Free trial
24 alternatives
Twobird combines email, notes, reminders, and to-do assignments in one inbox.
Boomerang adds email management and meeting scheduling features to Gmail and Google Workspace.
Thunderbird combines email, calendars, and contacts in a customizable application.
Popular in Email Tools
Well-known listings from the same topic.
FollowupThenfollowupthen.comElectronMailgithub.com/vladimiry/ElectronMailShortwaveshortwave.comTabular Emailtabular.emailMosaicomosaico.io
Roundcube FAQ
What type of email client is Roundcube?
A browser-based multilingual IMAP client with an application-like user interface.
Does Roundcube support extensions?
Yes, it provides a plug-in API for flexible extensions.
Is there a warning about scam emails?
Yes, the site notes scam emails appearing to be sent from Roundcube Webmail and points to protection guidance.
Is something wrong or out of date?
Tell us and an editor will check it.
Own this website?
Claim this listing
Claim the listing and suggest updates yourself. An editor checks every claim first.