AstrBot

LangBot is an open-source platform for building and operating AI-powered instant-messaging bots. It connects large language models to platforms including Discord, Telegram, Slack, LINE, QQ, WeChat, WeCom, Lark, DingTalk, KOOK, and Matrix, supporting multi-turn conversations, tool calling, multimodal input, streaming output, and agent workflows. The platform includes a built-in retrieval-augmented generation knowledge base, integrations with systems such as Dify, Coze, n8n, Langflow, and Deerflow, and an event-driven plugin system with MCP support. A browser-based management panel configures, manages, and monitors bots, while its multi-pipeline architecture supports separate bot workflows and operational monitoring. LangBot can be run through LangBot Cloud, a one-line uvx launch, Docker Compose, or other deployment methods. It also exposes an MCP endpoint that mirrors its HTTP API for programmatic management of bots, pipelines, plugins, and models.

LibreChat is an open-source, self-hosted AI chat platform that provides a ChatGPT-inspired interface for connecting to major AI providers and custom OpenAI-compatible endpoints. It supports model switching, multimodal file interactions, web search, speech-to-text and text-to-speech, image generation, conversation search, presets, branching, resumable streams, and a sandboxed Code Interpreter for languages including Python, JavaScript/TypeScript, Go, C/C++, Java, PHP, Rust, and Fortran. Its agent system supports no-code custom assistants, community-shared agents, MCP servers, tools, file search, code execution, reusable SKILL.md instruction bundles, subagents, and an Agent Management API. Agents can optionally use attached workspaces to inspect, search, edit, and run commands in bounded environments. The platform also provides generative UI artifacts, including React, HTML, and Mermaid content, plus custom actions and integrations with providers such as Anthropic, AWS Bedrock, OpenAI, Azure OpenAI, Google, Vertex AI, Ollama, Groq, Mistral, OpenRouter, and others. LibreChat includes multi-user authentication through OAuth2, LDAP, and email login; browser-based administration of users, groups, roles, and configuration; role-based permissions; observability through OpenTelemetry and Langfuse; Redis-backed synchronization for scaled deployments; and Docker Compose deployment options. It is built in public and intended for local or cloud self-hosting.

OpenBot is an open-source AI agent platform from CopilotKit that gives each agent its own computer with a browser, logins, files, tools, and a dedicated interaction channel. It runs in the user's infrastructure and accepts agents that speak the AG-UI protocol, including agents built with LangGraph, Mastra, CrewAI, Pydantic AI, Google ADK, or custom code. A single gateway mediates actions involving the computer, files, MCP servers, and UI components: it decides whether an action is permitted before execution and records it afterward. Agents can operate their own browser screen, hand control to a human for restricted actions, and return component-based responses. Docker Compose runs the application components and PostgreSQL, while the administrator supplies the model credentials; the repository describes the project as alpha software under active development.

CowAgent is an open-source AI assistant and agent harness developed by LinkAI. It plans complex tasks step by step, runs tools and skills, controls computers and external services, maintains long-term memory and a personal knowledge base, and supports multi-agent teams with separate roles, models, skills, knowledge, and workspaces. Its architecture routes messages from web and messaging channels through an agent core that reasons over available models, tools, skills, memory, and knowledge before returning a response. Memory uses a three-tier structure of conversation context, daily memory, and long-term MEMORY.md, with a nightly Deep Dream process that distills memories; the knowledge base is an automatically curated Markdown wiki with cross-references and a browsable knowledge graph. Built-in tools include file and terminal operations, web fetching and search, scheduling, memory retrieval, vision, and browser automation, while MCP servers can be added through configuration. Skills can be installed from the Skill Hub, GitHub, ClawHub, or URLs, or authored through conversation. CowAgent supports multiple LLM providers and routes chat, vision, image generation, speech, and embedding workloads separately. It can run locally, in Docker, on a server, or through its macOS and Windows desktop client, with a web console for configuration and a command-line interface for service and skill management. The project is licensed under the MIT License and was formerly named chatgpt-on-wechat.

WeChat Bot is an open-source IM agent and command-line tool based on Wechaty. It connects WeChat QR-code logins, Lark events, Telegram's Bot API, and WhatsApp Cloud API to AI services including ChatGPT, DeepSeek, Ollama, Claude, Pi, and other configured providers for message replies and analysis. The project routes received messages through a pipeline that captures WeChat messages locally in JSONL, sends them to a selected model or agent, and posts the response back to the IM channel. Its `wb wx` commands use OpenCLI wx-cli to access local WeChat chats, contacts, group members, favorites, and cached Moments; `wb stats` and `wb analyze` provide local statistics or AI-assisted group and friend analysis. Replies can be restricted with contact and group allowlists, prefixes, and group-mention rules, and non-text messages are not automatically sent to the reply pipeline. The repository is a Node.js project requiring Node.js 18 or later and can be installed with npm or run in Docker. It is licensed under the MIT License. The README warns that WeChat Web protocols can trigger account warnings or bans and recommends narrow allowlists and usage scopes.