Mattermost
Slack-style team chat you host yourself, written in Go on PostgreSQL. What its two free editions keep, what the paid plans hold back, and how it is licensed.
// COLLABORATION
15 entries tagged with "collaboration"
// COMPARISONS
3 Cloud storage Swapping Google Drive or Dropbox for a server you control: three tools compared on sync clients, encryption, what you need to run and the licence terms. Team chat Replacing Slack with team chat you host yourself: Mattermost, Rocket.Chat and OpenHive compared on their free editions, database, calls and mobile apps. Team wikis Keeping your team's documentation on your own server: BookStack, Outline and Wiki.js compared on page structure, sign-in, licensing and release status.
// ENTRIES
12 entries
Nextcloud
Sync and share files from a server you control, then add calendars, contacts and hundreds of other apps on top. Open source PHP server under the AGPL.
notabene
Review Markdown docs by commenting on the rendered page, then have an AI agent apply each note to the source and journal it, with git diffs to approve. No SaaS.
OpenHive
Slack-style team chat that runs on your own Supabase project: channels, threads, LiveKit calls, webhooks. MIT-licensed, still at version 0.1.0 with no release.
UnInbox
Answer support@ or sales@ as a team: comments inside threads, a status on each email, a screener for new senders. AGPL code; self-hosting is still undocumented.
Rocket.Chat
Team chat you host yourself, free for up to 50 users on the Starter plan. Matrix federation and air-gapped installs need a paid plan, priced on request.
Excalidraw
Hand-drawn style diagrams on an open source whiteboard, in the browser or inside a React app. A self-hosted copy has no share links or live collaboration.
NocoDB
Run an Airtable-style database on your own server: linked tables, kanban and form views, a REST API. Fair-code since 2026, Postgres and Redis in production.
Outline
Team wiki with live co-editing and nested documents. Source-available under BSL 1.1, and sign-in requires Google, Slack, Microsoft, Discord or an OIDC provider.
Plane
Issues, sprints and roadmaps in an open-source tracker pitched against Jira and Linear. The AGPL self-hosted edition only gets the features of the free tier.
Penpot
Interface mockups that hand developers SVG, CSS and HTML: an open source Figma alternative, used in the cloud or self-hosted with PostgreSQL and Valkey.
Seafile
Sync files block by block to your own server, in libraries you can lock with a password. Community runs in Docker; full-text search and S3 storage are Pro-only.