Open Source Signal Alternatives

    The best open source alternative to Signal is Mailman, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Signal and three of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Signal are Kingmailer (Freemium, Open Source) and Gutama (Free, Open Source).

    This page was last updated May 24, 2021

      • FreeOpen Source
      • Mac
      • Linux
      • BSD
      • Self-Hosted
      • Python
      • Solaris
      Mailman is integrated with the web, making it easy for users to manage their accounts and for list owners to administer their lists. Mailman supports built-in archiving, automatic bounce processing.
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    1. Kingmailer offers transactional SMTP, which lets you send, receive and route emails. Best use case is for SaaS, Forums and e-Commerce sites. It's ideal for sending email notifications. You get a clean IP address and Kingmailer offers 99% inbox rate.
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      • FreeOpen Source
      • Self-Hosted
      Gutuma was born out of the need for free mailing list / newsletter software that is geared, not towards mass-marketing companies and spammers, but web developers who need a system that can be easily integrated with an existing web site.

      Discontinued

      Last stable release is from 2008

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    Showing 3 of 3 alternatives