1. OpenAlternative
  2. /Alternatives
  3. /Gmail

Best Open Source Gmail Alternatives

Discover the best open source alternatives to Gmail.

The best open source alternative to Gmail is InboxZero. If that doesn't suit you, we've compiled a ranked list of other open source Gmail alternatives to help you find a suitable replacement. Other interesting open source alternative to Gmail is UnInbox.

Gmail alternatives are mainly Email Tools. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Gmail.

Favicon of Gmail website


A free email service developed by Google, offering secure webmail, POP3, IMAP access, spam filtration, and organizational tools since 2004.

Visit Website

An open-source email client that helps you achieve inbox zero with AI-powered features, customizable workflows, and seamless integrations.

Screenshot of InboxZero website

InboxZero is a revolutionary open-source email client designed to help you take control of your inbox and boost your productivity. With its powerful AI-driven features and intuitive interface, InboxZero transforms the way you manage your emails.

Key benefits of InboxZero include:

  • AI-powered email triage: Automatically categorize and prioritize your emails, ensuring you focus on what matters most.
  • Smart reply suggestions: Save time with context-aware response recommendations.
  • Customizable workflows: Create personalized email management processes that suit your unique needs.
  • Seamless integrations: Connect with your favorite productivity tools and services for a streamlined workflow.
  • Open-source flexibility: Benefit from community-driven improvements and the ability to customize the tool to your liking.
  • Cross-platform compatibility: Access your emails seamlessly across desktop and mobile devices.
  • Advanced search and filtering: Quickly find the emails you need with powerful search capabilities.
  • Privacy-focused: Your data remains secure with local processing and end-to-end encryption options.

Experience the power of an intelligent, adaptable email client that evolves with your needs. InboxZero empowers you to reclaim your time and achieve true email mastery.

An open-source email client that uses AI to categorize, prioritize, and streamline your inbox, helping you focus on what matters most.

Screenshot of UnInbox website

UnInbox is a revolutionary open-source email client designed to transform the way you handle your digital correspondence. By harnessing the power of artificial intelligence, UnInbox brings order to inbox chaos and helps you reclaim control over your email workflow.

Key features and benefits:

  • AI-Powered Categorization: UnInbox automatically sorts your emails into intuitive categories, making it easy to find and manage messages.
  • Smart Prioritization: The intelligent system learns your preferences and highlights important emails, ensuring you never miss critical communications.
  • Customizable Workflows: Create personalized rules and filters to automate repetitive tasks and streamline your email management process.
  • Distraction-Free Mode: Focus on your most important tasks with a clean, minimalist interface that eliminates unnecessary clutter.
  • Cross-Platform Compatibility: Access your organized inbox seamlessly across desktop and mobile devices.
  • Privacy-Focused: As an open-source solution, UnInbox prioritizes user privacy and data security.
  • Integration Friendly: Connect UnInbox with your favorite productivity tools for a seamless workflow.
  • Community-Driven Development: Benefit from continuous improvements and features contributed by a passionate open-source community.

UnInbox empowers you to spend less time managing emails and more time on what truly matters. Experience the future of email management with UnInbox – where intelligence meets inbox efficiency.


Get updates on new tools, alternatives, and other cool stuff.