Drilldown: tool
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MIT-licensed, self-hostable team chat with channels, voice/video, and broad
integration support. Its omnichannel inbox unifies live chat, email, WhatsApp, and
Telegram into one agent queue -- useful if you also want to replace a separate
customer-support tool, not just internal chat. (1) ·
Nonprofit, volunteer-run wiki hosting platform that provides
free MediaWiki instances with a wide range of pre-installed extensions. (1) ·
Open-source CRM purpose-built for nonprofits and advocacy groups -- donor
tracking, campaign management, event registration, and membership -- rather than a
generic sales CRM repurposed for fundraising. Integrates as a plugin into WordPress,
Drupal, or Joomla. (1)
None (1) ·
Has the most GitHub momentum of the self-hosted Slack alternatives
(~45k stars). The free Community edition covers most day-to-day needs; exceeding
Starter-plan limits blocks adding new users but does not lock you out of existing
data. (1) ·
See https://www.mediawiki.org/wiki/Miraheze for an overview of
available extensions and account setup. No cost, donation-supported;
account required to create a new wiki. (1)
Showing below up to 3 results in range #1 to #3.


