Roundcube vs Nextcloud Mail
A side-by-side comparison of two self-hosted mail servers options — licensing, setup difficulty, resource needs, and what each one replaces.
Roundcube
Browser-based IMAP webmail client
VS
Nextcloud Mail
IMAP webmail client integrated into Nextcloud
| Feature | Roundcube | Nextcloud Mail |
|---|---|---|
| Deploy effort | Under-an-hour setup | Read-the-docs project |
| Health score | 91 · Excellent | 64 · Good |
| Category | Mail Servers | Mail Servers |
| License | GPL-3.0 | AGPL-3.0 |
| Language | PHP | JavaScript |
| Setup difficulty | Easy | Easy |
| Min. RAM | 256 MB | 512 MB |
| Deployment | docker, bare-metal, source | source |
| GitHub stars | ★ 7,189 | ★ 1,029 |
| First released | 2008 | 2014 |
| Replaces | Gmail, Outlook Web | Gmail |
What are Roundcube and Nextcloud Mail?
Roundcube
Roundcube is a widely used, browser-based IMAP webmail client with a clean interface and a strong plugin ecosystem. It is commonly bundled with self-hosted mail servers.
- Full-featured IMAP webmail
- Extensive plugin system
- Drag-and-drop interface
- Address book and folder management
Nextcloud Mail
Nextcloud Mail is the official mail app for Nextcloud that connects to existing IMAP and SMTP accounts inside the Nextcloud interface. It integrates with contacts, calendar, and files.
- IMAP and SMTP support
- Integrated with Nextcloud
- Contacts and calendar links
- Threaded conversations
Roundcube vs Nextcloud Mail: key differences
Roundcube is written in PHP, while Nextcloud Mail is built with JavaScript. Licensing differs — GPL-3.0 for Roundcube versus AGPL-3.0 for Nextcloud Mail. Roundcube is the lighter option, starting around 256 MB of RAM against 512 MB for Nextcloud Mail. Roundcube is the more established project (first released 2008), while Nextcloud Mail arrived in 2014. Roundcube has the considerably larger community, at 7,189 GitHub stars versus 1,029. Roundcube lists first-class Docker deployment; Nextcloud Mail does not.
Why pick each one
Choose Roundcube if…
- Mature and stable
- Widely supported
Watch out for
- Default UI feels dated
- Webmail only, needs a mail server
Choose Nextcloud Mail if…
- Released under the AGPL-3.0 license
- Easy to set up — beginner-friendly
- Active community (1k GitHub stars)
- Written in JavaScript
Frequently asked questions
Is Roundcube or Nextcloud Mail better?
Neither is universally better. Roundcube has the larger community; both share a easy setup difficulty, so the decision comes down to features and licensing.
Are Roundcube and Nextcloud Mail free and open-source?
Yes. Roundcube is licensed under GPL-3.0 and Nextcloud Mail under AGPL-3.0. Both can be self-hosted at no software cost.
Can I run Roundcube and Nextcloud Mail with Docker?
Roundcube: yes. Nextcloud Mail: check the project docs for container support.
Which is lighter on resources, Roundcube or Nextcloud Mail?
Roundcube has the smaller minimum footprint at 256 MB of RAM, compared to about 512 MB for Nextcloud Mail. Real-world usage depends on library size, user count, and enabled features.