Rocket.Chat
Communications platform that puts data protection first (alternative to Gitter.im and Slack).
Free
Email, chat & meetings
1,634 self-hosted solutions from public repositories worldwide. Categories curated by people, licenses and star counts, shown as they are.
Mattermost
Platform for secure collaboration across the entire software development lifecycle, can be integrated with Gitlab (alternative to Slack).
Nextcloud
Access and share your files, calendars, contacts, mail and [more](https://apps.nextcloud.com/) from any device, on your terms.
ntfy
Push notifications to phone or desktop using HTTP PUT/POST, with Android app, CLI and web app, similar to Pushover and Gotify.
Jitsi Meet
WebRTC application that uses Jitsi Videobridge to provide high quality, scalable video conferences.
SimpleX Chat
The most private and secure chat and applications platform - now with double ratchet E2E encryption.
docker-mailserver
Production-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container. Only configurati...
Apprise
Apprise allows you to send a notification to almost all of the most popular notification services available to us today such as: Telegram, D...
Postal
Complete and fully featured mail server for use by websites & web servers.
Gotify
Notification server with Android and CLI clients (alternative to PushBullet).
Mail-in-a-Box
Turns any Ubuntu server into a fully functional mail server with one command.
OpenWA
WhatsApp API gateway exposing messaging as REST endpoints, with a web dashboard, multi-account sessions, and webhook events (alternative to...
Stalwart Mail Server
All-in-one mail server with JMAP, IMAP4, and SMTP support and a wide range of modern features.
Mailcow
Mail server suite based on Dovecot, Postfix and other open source software, that provides a modern Web UI for administration.
Tinode
Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots.
Screego
Screego is a simple tool to quickly share your screen to one or multiple people via web browser.
Fluxer
Instant messaging and VoIP platform built for friends, groups, and communities (alternative to Discord).
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Advertising
Ad Platform
A display-ad broker with advertiser, partner and operator consoles
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Real estate
Rental Billing
Space rental, contracts and billing in one button — for small landlords
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Finance · Trading
AI Auto-Trading
Automated trading where AI reviews every strategy and every decision is on record
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