Open-source alternatives to Yowsup

This project is a headless WhatsApp client and automation server that exposes multi-device functionality as a REST API gateway. It provides a centralized interface for managing multiple account sessions, automating messages, and developing bots through a standardized protocol. The system distinguishes itself by providing a secure webhook provider that forwards real-time messages and reactions to external URLs using signature verification. It includes specialized media utilities for converting images and GIFs into the WebP format required for stickers, as well as tools to simulate active user

This project is a community-curated directory of open-source software designed for deployment in private server environments and home labs. It serves as a comprehensive resource for discovering independent, self-hosted alternatives to mainstream cloud services, enabling users to maintain full data ownership and control over their digital infrastructure. The directory is structured through a hierarchical taxonomy that organizes a vast collection of applications into logical categories, ranging from media management and data analytics to private communication and team productivity tools. It dis

This project is a cross-platform messaging SDK and client development library used to build custom Telegram applications. It functions as a comprehensive framework that manages network encryption, local data storage, and API communication, providing a C-compatible JSON interface that allows integration with any programming language. The library distinguishes itself by providing a full database manager for encrypted local caching and synchronized state, alongside a dedicated bot framework for creating interactive bots with business account integration. It enables the implementation of speciali

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

Pyrogram is an asynchronous Python framework for interacting with the Telegram MTProto API. It serves as both a bot framework and a user client library, providing a concrete implementation of the MTProto protocol for secure communication with Telegram servers. The library distinguishes itself by providing a high-level wrapper layer that abstracts complex protocol methods into Python functions, while still allowing for the execution of raw API functions and low-level peer resolution. It supports multi-client concurrency, enabling the management of several user or bot identities within a single

supabase-js is a comprehensive client library designed to integrate frontend applications with a hosted backend-as-a-service. It provides a unified interface for interacting with a PostgreSQL database, identity management systems, cloud object storage, and real-time data synchronization. The library features an isomorphic client design that operates across both browser and server environments. It distinguishes itself through a type-safe approach, utilizing TypeScript to map database schemas directly to client-side definitions, and employs a PostgREST-based API to translate JavaScript calls in

This project is a Telegram command line interface and MTProto client. It functions as a userbot framework, providing a terminal-based environment to interact with Telegram accounts without a graphical user interface. The system differentiates itself through extensibility, offering Python bindings and a Lua scripting engine to automate account tasks and respond to messages. It also serves as a JSON-based chat exporter, capable of extracting user metadata and conversation histories into structured files. The client covers core messaging capabilities, including text exchange, group chat managem

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

Tutanota is an end-to-end encrypted email client and privacy-focused mail server. It functions as a cross-platform secure messaging application that provides encrypted email and calendar synchronization across desktop and mobile devices. The system ensures that only the sender and recipient can read messages by implementing a zero-knowledge architecture, where the service provider cannot access user private keys or cleartext data. This is achieved through client-side encryption and the use of asymmetric key exchange to share encrypted messages without prior secret key exchange. The platform

This project is a reverse engineering implementation and library designed to parse and decrypt the binary data streams used by the WhatsApp web client. It provides a WebSocket client library and tools to communicate with messaging servers by implementing reverse engineered protocol patterns. The system enables the development of custom clients and automation tools through the emulation of browser sessions and the management of persistent binary streams. It handles account authentication via QR code generation and pairing strings to link devices and maintain encrypted sessions. The project co

JDA is a Java wrapper for the Discord API, providing a framework for building automated agents and integrating applications with the chat platform. It functions as both a REST API client for managing server entities and a gateway client that maintains persistent WebSocket connections for real-time state updates. The library features a comprehensive voice API module for managing audio streaming, voice channel connectivity, and soundboard integration. It also includes a specialized toolkit for interactive UI design, enabling the creation of slash commands, buttons, select menus, and modal input

Lets-chat is a self-hosted team communication platform and XMPP chat server designed for private messaging. It provides a containerized communication environment for small teams to exchange messages and files, featuring a programmable REST API for automating conversations and managing messages from external tools. The platform functions as an XMPP gateway and server, ensuring interoperability with other compliant messaging clients. It distinguishes itself by supporting enterprise identity management, allowing administrators to verify user identities through local accounts or external director

signal-cli is a command line interface for the Signal messenger protocol. It functions as a headless client that allows users to send and receive messages, manage accounts, and verify phone numbers within a terminal environment instead of a graphical application. The project provides integration capabilities for external programs through a JSON-RPC server and a D-Bus interface. These allow for automated messaging workflows and the ability to trigger messaging actions from other software services via a background daemon. The software covers account identity management, including registration

Knightbot-MD is a WhatsApp bot framework that connects through the multi-device protocol to automate group management, moderation, and interactive features. It provides a modular system for running turn-based multiplayer games like Tic-Tac-Toe within group conversations, converting images into WebP stickers for chat sharing, and synthesizing text messages into audio clips through text-to-speech conversion. The bot includes a link-detection moderation engine that scans incoming messages against blocklisted domains and triggers automated warnings or muting. It enforces role-based command author

WeixinBot is a framework for WeChat account automation and bot development. It provides a programmable interface to monitor incoming messages and trigger automated actions within the WeChat ecosystem. The system emulates a browser session using a WebSocket-based protocol and establishes identity through QR code authentication. It maintains session-state persistence to keep accounts active without repeated verification. The project covers message processing for text, images, voice notes, and location data, and supports the transmission of emojis and links. It includes utilities for user conta

Fiora is a real-time communication suite and multimedia instant messenger designed as a self-hosted chat server. Built as a MERN stack messaging platform, it provides a networked environment for private and group conversations using a Socket.io based architecture. The platform is distinguished by its focus on self-hosting, allowing deployment on private Windows, Linux, or macOS servers for full control over user data. It features a highly customizable interface where users can apply themes, custom colors, and wallpapers to personalize their experience. The system covers a broad range of comm

wxpy is a Python library and bot framework that acts as an API wrapper for personal WeChat accounts. It provides a programming interface to automate account tasks, send messages, and manage contacts. The project functions as a chatbot integration engine, allowing users to connect external AI services and custom logic to automatically respond to private and group conversations. It includes a social media automation toolkit for programmatically handling friend requests and group memberships. The framework covers multimedia message broadcasting, user profile retrieval, and contact search. It al

WildfireChat’s im-server is an open-source instant messaging backend that handles message routing, user management, and group chat for private deployments. It provides a self-hosted messaging platform that can run on private infrastructure without third-party cloud dependencies, supporting enterprise messaging with group management, user directories, and external system integration. The server synchronizes messages and state across mobile, desktop, web, and mini-program clients simultaneously, and supports real-time audio/video calls with group conferencing and live streaming. It includes enc

whatsmeow is a Go library that implements the WhatsApp multidevice protocol, providing direct access to the binary node serialization, WebSocket-based connection management, and Signal‑Protocol encryption that underpin WhatsApp’s messaging infrastructure. It maintains persistent, low-latency connections across multiple devices, handles session credentials independently for each device, and processes incoming events through an event‑driven dispatch system for messages, receipts, and presence updates. The library differentiates itself through comprehensive client‑side state management: it cache

This project is a social blogging application built with Flask. It provides a platform for user account management, following relationships, and chronological post streams, supported by a PostgreSQL relational database. The application features a multilingual web interface with localized content and date formatting. It is designed as a dockerized web application, utilizing containerization for consistent deployment across different environments. The system integrates a variety of core capabilities, including full-text search with provider abstraction, an asynchronous task worker for backgrou

This project is a curated directory and catalog of privacy-respecting software and security-focused services. It serves as a structured resource for finding alternatives to corporate services, focusing on tools that prioritize data sovereignty, end-to-end encryption, and user anonymity. The directory is maintained as a markdown-based resource list and rendered via a static site generator. It further extends its utility through a CORS-enabled public API and a JSON-based data schema, allowing the curated catalog of tools and providers to be retrieved programmatically. The collection covers a w

WeRoBot is a chatbot development framework and API integration library designed for building automated bots and managing interactions for WeChat official accounts. It provides a structured environment for processing user inputs and delivering programmed responses through a dedicated message routing engine. The framework distinguishes itself with a stateful session manager that persists user data across interactions using pluggable storage backends. It also features a routing system that parses XML payloads and directs traffic to specific handlers based on content, events, or text patterns. T

Hanko is an open-source identity provider and customer identity and access management system. It serves as a passkey authentication service and an OAuth and SAML SSO gateway, allowing applications to authenticate users and issue tokens via standard identity protocols. The project distinguishes itself through a strong focus on passwordless access using WebAuthn-based passkeys and email-based passcodes. It provides framework-agnostic authentication interfaces as customizable web components that can be embedded directly into web applications to handle login, registration, and profile management.

Converse.js is an embeddable, self-hosted XMPP chat client that runs entirely in the browser. It communicates with XMPP servers using standard XML stanzas over WebSocket or BOSH transports, and provides end-to-end encryption through the OMEMO protocol with double ratchet algorithm and X3DH key exchange. The client is built on a plugin-based architecture that allows extending core functionality at runtime without modifying the client itself, and uses a DOM-based rendering approach with an event-driven message bus for internal coordination. The client manages message history through XEP-0313 Me

This project is a library for Telegram bot development, enabling the creation of automated agents that respond to user commands and messages using the Telegram Bot API. It facilitates Telegram content automation by programmatically sending rich media, managing sticker sets, and publishing profile stories. The project supports real-time event handling through both webhook and long-polling mechanisms. It also provides a specialized interface for Telegram payment integration to process digital transactions, create invoices, and handle refunds. Broad capability areas include automated chat manag

This is a header-only C++ library and asynchronous network framework used to implement WebSocket clients and servers. It provides a full implementation of the WebSocket protocol, including handshakes, subprotocol negotiation, and frame parsing. The framework is distinguished by a policy-based transport layer and template-driven protocol negotiation, allowing the underlying network implementation to be swapped between raw buffers, streams, or custom policies. It supports per-message deflate compression to reduce data transmission volume and integrates Transport Layer Security for encrypted bid

This project is a Node.js library and browser automation framework that provides a JavaScript interface for the Chrome DevTools Protocol. It functions as a headless browser controller, enabling the programmatic management of browser targets, the execution of scripts, and the monitoring of network activity via WebSocket connections. The interface includes an interactive shell and REPL for real-time command execution and event binding. It also provides utilities for retrieving protocol descriptors and inspecting embedded documentation to identify available commands and parameter types. The lib