#69 in Collaboration & CommunicationUpdated 2026-08

Roundcube

by Roundcube · Open source browser-based IMAP webmail client written in PHP

25.5 — BenchRank score out of 100

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Overview

Roundcube is a browser-based, multilingual IMAP webmail client written in PHP and run on your own server. It handles MIME and HTML messages, threaded listings, message search, spell checking and multiple sender identities, with an address book supporting groups and LDAP connectors. A plug-in API extends it; the current release is version 1.7.2.

Best for: Mail hosts and self-hosters wanting a browser front end for an existing IMAP server
Pricing: No prices are shown; the site presents Roundcube as free and open source software to download.
Runs on: Self-hosted

Strengths and trade-offs

Strengths

Browser-based IMAP client with drag-and-drop message management
Address book with groups, LDAP connectors and find-as-you-type
Free and open source, with a plug-in API for extensions
Responsive skin, shared IMAP folders and ACL support

Trade-offs

Self-hosted download only; you supply the PHP host and IMAP server
Recent news is almost all security releases, so patching is ongoing
No support terms, SLA or commercial backing shown on the page

How this score is made up

Each dimension is scored out of 100 and combined into the headline score using fixed weights.

MCP support: 0 out of 100
API quality: 0 out of 100
Documentation: 0 out of 100
Agent friendliness: 65 out of 100
Changelog: 100 out of 100
Marketing site structure: 60 out of 100
Operational trust: 0 out of 100

Measured, but not part of the score

Useful to know, but not a mark for or against the product — so these do not affect the ranking.

Openness: 30 out of 100
Maintenance: 100 out of 100

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