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RainLoop

Simple, modern and fast web-based email client

Mail Servers Archived ★ 4.1k stars Easy setup AGPL-3.0

This project is archived. Upstream development has stopped, so expect no new features or security fixes. Consider an actively maintained mail servers alternative.

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

Is RainLoop secure?

No known vulnerabilities affect RainLoop's latest release (v1.17.0). OSV.dev lists 2 past advisories for the project; none of them applies to this release. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

  • Most recent fixed advisory CVE-2022-29360, published 2022-07-28 (1539 days ago)

Source: OSV.dev, checked 2026-10-14. How this is measured.

RainLoop replaces

Self-hosted Gmail alternativesSelf-hosted Outlook Web alternatives

Health badge

Maintain RainLoop? Add its health score to your README. The badge links back to this page.

SelfHostIndex: 15 · archived

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The score is recomputed on every nightly rebuild from public repository data — see how it is calculated.

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