Best 189 Containerization tools in 2026

All-in-one mail server with JMAP, IMAP4, and SMTP support and a wide range of modern features. ([Source Code](https://github.com/stalwartlabs/stalwart)) `AGPL-3.0` `Rust/Docker`

Open source email alias solution to protect your email address. Comes with browser extensions and mobile apps. ([Source Code](https://github.com/simple-login/app)) `MIT` `Docker/Python`

Complete and fully featured mail server for use by websites & web servers. ([Source Code](https://github.com/postalserver/postal)) `MIT` `Docker/Ruby`

Simple yet full-featured mail server as a set of Docker images. ([Source Code](https://github.com/Mailu/Mailu)) `MIT` `Docker/Python`

Mail server suite based on Dovecot, Postfix and other open source software, that provides a modern Web UI for administration. ([Source Code](https://github.com/mailcow/mailcow-dockerized)) `GPL-3.0` `Docker/PHP`

Production-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container. Only configuration files, no SQL database. ([Source Code](https://github.com/docker-mailserver/docker-mailserver)) `MIT` `Docker`

Email forwarding service for creating aliases. ([Source Code](https://github.com/anonaddy/anonaddy)) `MIT` `PHP/Docker`

Conversational app builder (alternative to Typeform and Landbot). ([Source Code](https://github.com/baptisteArno/typebot.io)) `AGPL-3.0` `Docker`

High-performance and feature-rich chat server for Matrix, and the successor to conduwuit (fork of Conduit). ([Demo](https://try.tuwunel.chat/), [Source Code](https://github.com/matrix-construct/tuwunel)) `Apache-2.0` `deb/Docker/Nix/Rust`

All-in-one customer engagement platform from lead-gen to post-sales, from WhatsApp to your website. With omni-channel live agents and AI-powered chatbots (alternative to Intercom, Zendesk, Tawk.to and Tidio). ([Source Code](https://github.com/Tiledesk/tiledesk)) `MIT` `Docker/K8S`

Screego is a simple tool to quickly share your screen to one or multiple people via web browser. ([Demo](https://app.screego.net/), [Source Code](https://github.com/screego/server)) `GPL-3.0` `Docker/Go`

Next-Gen self-hosted chat server and clients. ([Demo](https://app.samacloud.io/demo), [Source Code](https://github.com/SAMA-Communications/sama-server), [Clients](https://github.com/SAMA-Communications/sama-client)) `GPL-3.0` `Nodejs/Docker`

Communications platform that puts data protection first (alternative to Gitter.im and Slack). ([Source Code](https://github.com/RocketChat/Rocket.Chat)) `MIT` `Nodejs/Docker/K8S`

Share sensitive information securely with self-destructing links that are only viewable once. ([Demo](https://onetimesecret.com), [Source Code](https://github.com/onetimesecret/onetimesecret)) `MIT` `Docker/Ruby/Nodejs`

Push notifications to phone or desktop using HTTP PUT/POST, with Android app, CLI and web app, similar to Pushover and Gotify. ([Demo](https://ntfy.sh/app), [Source Code](https://github.com/binwiederhier/ntfy), [Clients](https://github.com/binwiederhier/ntfy-android)) `Apache-2.0/GPL-2.0` `Go/Docker

Notification infrastructure for developers. ([Source Code](https://github.com/novuhq/novu/)) `MIT` `Docker/Nodejs`

Notification server with Android and CLI clients (alternative to PushBullet). ([Source Code](https://github.com/gotify/server), [Clients](https://github.com/gotify/android)) `MIT` `Go/Docker`

Whistleblowing software enabling anyone to easily set up and maintain a secure reporting platform. ([Demo](https://demo.globaleaks.org), [Source Code](https://github.com/globaleaks/globaleaks-whistleblowing-software)) `AGPL-3.0` `Python/deb/Docker`

Community-driven Matrix homeserver, the continuation of conduwuit focusing on user experience and new features (fork of Conduit). ([Source Code](https://forgejo.ellis.link/continuwuation/continuwuity)) `Apache-2.0` `Rust/Docker/K8S/deb`

Language-agnostic real-time messaging (Websocket or SockJS) server. ([Demo](https://github.com/centrifugal/centrifugo#demo), [Source Code](https://github.com/centrifugal/centrifugo)) `MIT` `Go/Docker/K8S`

Realtime server for reliable two-way communication over WebSockets, Server-sent events, etc. ([Demo](https://demo.anycable.io), [Source Code](https://github.com/anycable/anycable)) `MIT` `Go/Docker`

Manage my Damn Life (MMDL) is a self-hosted front end for managing your CalDAV tasks and calendars. ([Source Code](https://github.com/intri-in/manage-my-damn-life-nextjs)) `GPL-3.0` `Nodejs/Docker`

Calendar syncing tool that pulls and pushes events between calendar sources and destinations via iCal/ICS or OAuth, with support for anonymized busy/free events. ([Source Code](https://github.com/ridafkih/keeper.sh)) `AGPL-3.0` `Docker`

Save the precious readable content of web pages you like and want to keep forever. See it as a bookmark manager and a read later tool. ([Source Code](https://codeberg.org/readeck/readeck), [Clients](https://codeberg.org/readeck/browser-extension)) `AGPL-3.0` `Go/Docker`