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RainLoop

Simple, modern and fast web-based email client

Mail Servers ★ 4.1k stars Easy setup AGPL-3.0

RainLoop is a fast, simple webmail client with a modern interface that works with any IMAP and SMTP server. It stores no email data itself, acting as a thin client.

Official siteSource code

Key features

  • Modern, responsive UI
  • No database required
  • Multi-account support
  • Works with any IMAP server

Pros & cons

Strengths

  • Released under the AGPL-3.0 license
  • Easy to set up — beginner-friendly
  • First-class Docker support for quick deployment
  • Active community (4.1k GitHub stars)

Trade-offs

  • Development largely stalled
  • SnappyMail is the active fork

RainLoop replaces

Self-hosted Gmail alternativesSelf-hosted Outlook Web alternatives

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