Best open source Communication projects of 2026

Rocket.Chat

TYPESCRIPT

The communications platform that puts data protection first

Novu

★ FEATUREDTYPESCRIPT

The open source Inbox component and notification platform

Mattermost

TYPESCRIPT

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle

Jitsi Meet

TYPESCRIPT

Jitsi Meet - Secure, Simple and Scalable Video Conferences

Chatwoot

RUBY

Open-source live-chat, email support, omni-channel desk. An alternative to Intercom, Zendesk, Salesforce Service Cloud

Zulip

PYTHON

Zulip server and web application. Open-source team chat

Listmonk

GO

Open-source platform for managing subscribers, creating campaigns, and sending bulk emails with advanced features and integrations.

Postal

RUBY

Self-hosted email delivery platform with powerful features for transactional and bulk emails, offering full control and customization.

Flarum

PHP

Lightweight, extensible forum platform with a sleek interface, powerful moderation tools, and seamless integration capabilities.

Lemmy

RUST

Open-source forum and link aggregator that connects communities across the fediverse. Self-hosted, ad-free, with powerful moderation tools and federation.

Matrix (Element)

TYPESCRIPT

A glossy Matrix collaboration client for the web

Mautic

PHP

Mautic is a free and open source marketing automation platform that helps businesses manage leads, create campaigns, and analyze results.

Papercups

ELIXIR

Open-source live customer chat

Plunk

TYPESCRIPT

Plunk unifies marketing, transactional, and broadcast emails into a single, complete solution for businesses of all sizes.

Papra

TYPESCRIPT

A document management platform that helps you archive, organize, and search files with email ingestion, tagging capabilities, and powerful search functionality.

Campfire

RUBY

Install your own group chat system with @mentions, DMs, and mobile support. One-time purchase, no monthly fees. Includes full source code for customization.

Fider

GO

A self-hosted community feedback tool that helps organizations gather, discuss, and prioritize user suggestions and feature requests.

Dittofeed

TYPESCRIPT

Open-source customer engagement & messaging automation

Sendportal

PHP

Open-source email marketing platform offering unlimited subscribers, campaigns, and workspaces. Self-hosted solution with powerful API and beautiful interface.

Sendune

TYPESCRIPT

A comprehensive platform for managing transactional and marketing emails through AWS SES, featuring customer data management, SMS capabilities, and workflow automation.

Loops

PHP

Open-source, decentralized short-video platform that gives creators control. No ads, no lock-in, built on ActivityPub for true community ownership.

Valour

C#

Open-source communication platform with multi-window chat, economy systems, and privacy-first approach. Built by communities for superior performance.

Suprascribe

TYPESCRIPT

Free subscription tracker that automatically scans your email to find recurring charges. Privacy-focused discovery with complete spending overview and management tools.