openTag

Open source AI coworker for Slack and Lark

openTag introduction

openTag is an open source AI coworker that lives in Slack and Lark. You mention it in a thread with a task, it runs a coding agent on your own computer, and it replies in the same thread.

Website:: opentag.build

💻 Code & DB Assistantfree

openTag overview

openTag connects team chat to AI agents running on your own machine. You create an agent, prepare your computer with a connection command, and connect your messaging app (Slack or Lark). When you mention openTag in a thread, the openTag app hands the request to your computer, where a small background program runs your coding agent with your own subscription or API key, and the reply is sent back to the thread. It supports agent runtimes including Codex, Claude Code, and Pi, and is described as having no AI provider lock-in. Shared team memory is handled through Context Tree, a portable, file-based, git-backed memory layer hosted in your GitHub organization.

openTag features

Open source under Apache 2.0
Works in Slack and Lark
Runs coding agents on your own computer
Supports Codex, Claude Code, and Pi agent runtimes
Bring your own subscription or API key
No AI provider lock-in
Customisable agent profiles
Team mode: invite your agent to team channels
Agents can hand work to each other and check on each other's progress
Context Tree shared team memory: file-based, git-backed, hosted in your GitHub organization
Connects to over 1000 popular services including Slack, Lark, GitHub, Notion, Linear, Google Drive, Jira, and Figma
Local first on Mac and Linux, with Docker self-hosting

Questions about openTag

openTag pros

Open source under Apache 2.0
No AI provider lock-in; works with Claude or Codex plans or an API key
Agents run locally on your own computer
Supports Slack and Lark
Team mode lets one agent serve a channel
Context Tree team memory is file-based, git-backed, and hosted in your own GitHub organization
By default, openTag's servers don't store conversations, code, or memory
Free to use, paying only for your own AI use

openTag limitations

Requires a Mac or Linux computer with Claude, Codex, or Pi installed
Requires a Slack or Lark workspace
Teams and Discord support is only on the roadmap
Subscription plans should be used in accordance with each provider's terms of use, and an API key is recommended for shared workspaces