Open-source alternatives to Element Web

Rocket.Chat is a self-hosted communication platform designed for organizations to maintain full control over their messaging infrastructure and data. It functions as a scalable collaboration suite that supports growing teams by managing consistent configuration cycles across diverse deployment environments. The platform distinguishes itself through a modular architecture that allows for deep customization of enterprise collaboration workflows. It features a sandboxed application engine that enables developers to build and integrate custom tools and plugins within an isolated environment, ensu

Zulip is an open-source, self-hosted chat platform designed for real-time team communication. It organizes conversations into threaded streams, allowing users to maintain focus and manage complex discussions within a private, secure infrastructure. The project provides full control over data, authentication, and server management, making it a comprehensive solution for organizations requiring a dedicated messaging environment. The platform distinguishes itself through a hybrid backend architecture that combines a robust web framework for standard requests with an asynchronous event-streaming

qTox is a decentralized instant messaging application and a Tox protocol chat client. It provides a cross-platform graphical user interface for encrypted text, voice, and video communication. The project enables peer-to-peer encrypted messaging and secure VoIP communication without relying on central servers or third-party intermediaries. It utilizes the Tox protocol to facilitate direct voice and video calling and peer-to-peer file exchange. Identity and network management are handled through decentralized identity mapping and a distributed hash table for peer discovery and routing. All dat

Dendrite is a second-generation Matrix homeserver written in Go, designed to handle room management, federation, and client API traffic for real-time communication. It implements the Matrix protocol for federated messaging, presence, and encrypted communication, and can be deployed as a self-hosted platform that manages user accounts, rooms, media, and end-to-end encryption. The server uses a modular architecture where independent components communicate through an internal message bus, supporting federation with remote homeservers, full-text search indexing of message content, presence broadc

Electron.NET is a framework for building cross-platform desktop applications using ASP.NET Core, Razor Pages, MVC, or Blazor. It serves as a wrapper that hosts .NET web projects within a native desktop shell, allowing web-based logic to function as standalone software across different operating systems. The project provides a hosting environment specifically for Blazor components and other .NET web technologies, converting them into distributable binary executable packages. It integrates a native web browser control for UI rendering and utilizes a structured communication channel to pass mess

PakePlus is a web-to-native converter and application packager that transforms website URLs or static directories into standalone native desktop and mobile applications. It provides a native browser shell to wrap web content, acting as a cross-platform application shell for Android, iOS, and various desktop environments. The project distinguishes itself through a cloud-based app packager, utilizing remote build pipelines to compile application binaries without requiring a local development environment. It includes a JavaScript injection tool and a system-level API bridge, allowing users to ad

Synapse is a decentralized communication server implementation that enables real-time messaging and data exchange across the global Matrix federation. It functions as a homeserver, allowing operators to host their own nodes while maintaining control over personal data and user identity within a distributed network. The server utilizes a federated messaging protocol to exchange messages and user data with independent servers, ensuring consistent state across the network. To support high-traffic environments, it employs a distributed service architecture that offloads tasks to independent backg

Mattermost Server is an open source collaboration suite and self-hosted team communication platform. It functions as an enterprise chat server and extensible messaging backend that provides a secure environment for professional organizations to exchange messages and coordinate software development. The platform is designed as an AI-integrated communication hub, embedding artificial intelligence into messaging flows to assist users with information retrieval and task completion. It supports a high degree of customization through a plugin-based extension model, allowing for the creation of cust

Whitebophir is a collaborative whiteboarding application designed for real-time visual collaboration. It enables multiple users to brainstorm and create content together on a shared virtual canvas using freehand sketching, geometric shapes, and text labels. The platform focuses on private workspace management, allowing the creation of restricted boards via unique URLs and token-based access control to manage editing permissions. It integrates real-time state synchronization for drawing updates and a built-in chat system for text communication between collaborators. The workspace includes too

This project is an embedded operating system for creating decentralized peer-to-peer communication networks using long-range radio hardware. It provides an off-grid messaging protocol for transmitting text and GPS coordinates without relying on cellular or internet infrastructure. The firmware implements a secure communication framework using shared keys and high-grade encryption to protect data transmitted over the air. It includes a LoRaWAN hardware interface to manage radio parameters and an MQTT radio gateway to bridge local mesh traffic to external networks. The system covers a broad ra

Open-IM-Server is an instant messaging server and cross-platform messaging backend designed for real-time text and media communication. It provides a distributed chat architecture that coordinates user sessions and group communications across multiple server nodes to support millions of concurrent users. The system features a scalable message distribution model that utilizes asynchronous message pipelines and distributed queueing to maintain reliability during traffic spikes. It employs multi-level data caching across local memory and distributed stores to reduce latency and uses a document-b

Colanode is a local-first collaboration platform designed for shared documents, chat, and databases. It provides a self-hosted suite for team collaboration and knowledge management, allowing users to maintain full control over their data and privacy on their own infrastructure. The platform is distinguished by a synchronization engine that uses WebSockets for real-time data broadcasting and a local-first approach to ensure work continues offline. It incorporates AI-powered retrieval through vector-based semantic search, enabling users to find information based on meaning across documents and

BetterChatGPT is a cross-platform user interface and OpenAI API client designed for interacting with large language models. It functions as a prompt engineering workspace and a self-hosted AI frontend that allows users to connect to models via API keys or custom proxy endpoints. The project distinguishes itself through conversation management tools, including the ability to organize chats into color-coded folders and maintain a library of reusable prompt templates. It also includes a real-time cost monitoring system that tracks token consumption and calculates estimated pricing for interactio

This project provides a cross-platform messaging interface toolkit designed for building real-time chat applications and generative AI agents. It offers a collection of pre-built components that render consistent messaging experiences across mobile and web environments, handling the complexities of state management and data synchronization between the user interface and backend services. The library distinguishes itself through a highly modular architecture that allows developers to inject custom logic and UI overrides via builder functions. This approach enables the creation of tailored mess

Nativefier is a cross-platform desktop application builder that converts web URLs into standalone executables for Windows, macOS, and Linux. It functions as a web-to-desktop application converter, wrapping web pages in a dedicated browser window with its own launcher and identity. The tool uses an Electron-based wrapper to embed websites within a Chromium browser instance and Node.js runtime. It differentiates itself through automatic branding, extracting application names and icons from target websites to configure the desktop wrapper. The system provides mechanisms for custom styling and b

Signal-Desktop is a cross-platform messaging application that provides end-to-end encrypted communication. It implements the Signal Protocol to secure messages and voice calls, ensuring that only intended recipients can access content. The application manages asynchronous key exchange and session initialization to maintain secure communication channels between parties who are not online simultaneously. The project distinguishes itself through advanced cryptographic protections, including hybrid post-quantum security that combines classical elliptic curve cryptography with lattice-based algori

Nativefier is a command-line tool that transforms web applications into standalone desktop software. By wrapping web content within a cross-platform container, it enables users to run websites as native applications on Windows, macOS, and Linux. The tool functions as a build-time orchestrator that packages a browser runtime with specific site configurations and platform-specific metadata. It allows for extensive customization of the resulting application, including the ability to inject custom JavaScript and CSS to modify site behavior or appearance. Developers can also utilize the tool progr

This project is a cross-platform messaging client that implements a secure, real-time communication protocol. It provides a comprehensive development toolkit, including a database library and messaging SDK, which allows for the creation of custom messaging applications that maintain synchronized state across multiple devices. The core architecture relies on an asynchronous event-driven model to ensure responsive performance while managing persistent local database synchronization with server-side state. The client distinguishes itself through a robust end-to-end encryption layer that supports

Papercups is an open-source live chat platform and self-hosted customer messaging system. It provides a real-time communication infrastructure consisting of an embeddable web widget for customers and a containerized administrative dashboard for support teams. The platform features an omnichannel messaging hub that aggregates and normalizes conversations from email, SMS, and third-party chat channels into a single unified stream. It also includes a framework for deploying automated FAQ chatbots to handle initial inquiries and a real-time session monitoring tool that allows agents to view a use

This project is a self-hosted, cross-platform instant messaging platform featuring a Go backend and a protobuf-based messaging server. It provides a unified communication suite with native clients for iOS, Android, and web, utilizing gRPC and Protocol Buffers for efficient data exchange. The system is distinguished by an extensible chatbot framework that allows for the integration of automated bots and plugins via standardized service interfaces. It supports high-availability clustering with sharded load distribution and a pluggable database backend to ensure reliability and flexible data per

HumHub is an open-source enterprise social networking framework designed to facilitate internal communication and team collaboration within private organizational networks. It provides a modular architecture that allows organizations to build secure, self-hosted digital workspaces where users can manage profiles, share content, and organize projects through dedicated collaborative spaces. The platform distinguishes itself through a highly extensible plugin system and a granular role-based access control model. By utilizing an event-driven hook system and a modular architecture, developers can

Apollo Universal Starter Kit is a full-stack application boilerplate and starter template designed to accelerate cross-platform development across web, mobile, and server environments. It provides a modular architecture that organizes code into independent, self-contained feature directories, combined with a GraphQL-driven data layer and a server-side rendering pipeline to optimize performance and search engine optimization. The project incorporates compile-time code generation tooling to automatically scaffold schemas, resolvers, and components, alongside a real-time subscription engine for

d2-admin is an admin dashboard framework used to build back-office management interfaces. It provides a set of pre-configured layouts and themeable components, including foldable sidebars and draggable grid systems, to facilitate system oversight and control. The framework is distinguished by its multi-tab administration interface, which allows users to switch between pages and reorder tabs via drag and drop. It also features a dynamic translation system for multi-language interface localization and a dedicated toolset for tabular data management, enabling the import and export of data via CS

Jitsi Meet is an open-source platform for real-time audio and video communication. It provides a complete infrastructure for hosting secure video conferences, supporting features such as screen sharing, messaging, and participant polling. The platform is designed for both standalone use and integration into external web or mobile applications. The system utilizes a selective forwarding unit architecture to route media streams between participants, ensuring efficient communication across multiple users. It relies on standardized real-time transport protocols to manage data transmission and inc

Electronic WeChat is an Electron-based desktop chat client and wrapper for the WeChat messaging service, designed for macOS and Linux. It provides a functional messaging interface that integrates with native operating system notifications and system trays. The client includes a message recall blocker that prevents senders from retracting or deleting messages after they have been delivered, ensuring the recipient retains a permanent record of the conversation. It also features a URL redirect bypass to open destination websites directly in the default web browser. The application supports stan

Soketi is a high-performance WebSocket server designed to facilitate real-time bidirectional communication and event broadcasting. It functions as a multi-tenant gateway that implements the Pusher protocol, allowing existing client-side applications to integrate without modifying their underlying logic. The server acts as a distributed event broker, synchronizing messages across multiple instances to support horizontal scalability in cloud-native environments. The platform distinguishes itself through its focus on secure, isolated multi-tenant hosting and robust traffic management. It enforce

Diaspora is a federated social networking platform that allows users to run and manage self-hosted community servers, known as pods. It operates as a distributed network where independent server nodes exchange content and users using open protocols and standardized communication schemas. The platform is distinguished by its focus on decentralized identity management and privacy-preserving communication. It includes a privacy-focused media proxy that routes external assets through a local server to protect user identity and supports cross-instance account migration, allowing users to move thei