SHSelfHostIndex

Chat & Communication

Run your own team chat and video calls with self-hosted alternatives to Slack, Discord, and Zoom.

124 self-hosted apps · 391 comparisons

All chat & communication apps

Last reviewed Aug 26, 2026 · 472 words

The 124 apps filed under communication do at least five unrelated jobs: customer-support inboxes (Chatwoot, Papercups), private messengers (SimpleX, Berty), voice servers (Mumble), collaborative editors (Etherpad), and real-time plumbing for developers (Centrifugo, which is a WebSocket engine, not a chat app). Comparing across those groups is meaningless, so the selection process starts with naming the job, not shortlisting the software.

How to choose a chat platform

Name who is on the other end. Teammates in channels is a different category entirely — that's team chat, where Mattermost and Zulip live. Customers writing in from your website points you at the support-inbox tools. Friends and family points you at messengers, and there the honest axis is metadata: SimpleX Chat has no user identifiers at all and lets you run your own relay servers, which is as private as messaging currently gets, at the cost of a newer protocol and group features that are still maturing.

Then weigh text against voice. Nothing text-based here replaces the experience of a low-latency voice room; Mumble has been doing exactly that since 2005 and its Murmur server runs happily in 128 MB.

Last, count the moving parts. Chatwoot is a Ruby, Postgres, and Redis stack wanting 2 GB of RAM; Murmur is nearly a static binary. Match the ops budget to how much the tool earns its keep.

Where to start

Chatwoot is the pick when a business needs Intercom without the per-seat pricing: live chat widget, shared inbox across email and social channels, automation, 36,221 stars and active development. Budget real resources and treat it as a production service. SimpleX Chat is the pick for personal messaging where privacy is the point — start with the app and public relays, self-host relays once you trust it. Mumble is the pick for a gaming group or any recurring voice room: Easy difficulty, excellent audio, encrypted connections, and a dated client UI nobody actually minds once they're in a channel.

The adoption problem is the real spec sheet

A messenger you host is only useful if other people install the client, and that, not the software, is where most personal deployments die. Signal-replacement projects ask contacts to change habits; a voice server asks them to click a link before game night. This is why my success rate with Mumble is roughly 100% and with self-hosted messengers considerably lower. Factor in the other humans before the RAM.

Default for a first-timer: Mumble's server. It is the one tool here that is easy to run, easy to get others onto, and clearly better than the proprietary thing it replaces. Take on Chatwoot when a business inbox demands it, and SimpleX when your circle is genuinely willing to move.

Curated picks

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Chat & Communication comparisons

391 head-to-head comparisons in this category.

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