openTag
Bring Claude Code, Codex or Pi to Slack and Lark. openTag is a free, open source AI coworker that runs on your machine with your own plan or API key.
What is openTag?
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. It is built for teams and individuals who want to keep their own Claude, Codex or Pi subscription or API key instead of being tied to a single AI provider.
Key features
- Open source under Apache 2.0
- The code is public, and openTag can be self-hosted with Docker.
- Chat-native in Slack and Lark
- Mention openTag in a thread, and the request is handed to your computer and answered back in the same thread.
- Bring your own agent and plan
- openTag runs Codex, Claude Code or Pi, powered by a Claude or Codex subscription or an API key.
- Local first
- The agent runs on your Mac or Linux computer, and messages and results pass through openTag.
- Team mode
- One agent serves a channel and anyone in it can mention it, and agents can hand work to each other and check on each other's progress.
- Context Tree memory
- A portable, file-based, git-backed memory layer that holds shared team memory in your own GitHub organization.
- Connects to over 1000 services
- Including Slack, Lark, GitHub, Notion, Linear, Google Drive, Jira and Figma.
How to use openTag
- Create your agent: give it a name and choose the runtime — Codex, Claude Code or Pi.
- Connect your computer: paste the connection command into your coding assistant on your computer and wait for it to connect.
- Connect messaging: choose Slack or Lark and add your agent to the workspace.
- Mention openTag in a thread with the task you want done.
- Read the reply in the same thread, including the sources the agent used.
Use cases
- Engineering teams that want an agent to triage repository issues and open pull requests.
- Team members who need a status update pulled together from shared discussions and project notes.
- Groups that want to share one AI subscription or API key across a whole channel.
- Solo open-source maintainers who need work handled while they are away.
- Designers and engineers who tag a task and get on with other work while it is completed.
Pricing
openTag is free to use, and you pay for your own AI use with your existing provider subscription or API key. The comparison table on the website lists openTag's pricing as Free.
FAQ
Is openTag free to use?
Yes. openTag is free, and you cover your own AI usage through your existing provider subscription or API key.
Which messaging apps does openTag support?
openTag works with Slack and Lark. Support for Teams and Discord is on the roadmap.
Can I use my existing Claude or Codex subscription with openTag?
Yes, openTag works with your Claude or Codex plan, or with an API key. Subscription plans should be used in accordance with each provider's terms of use, and for shared workspaces openTag recommends using an API key.
What do I need to run openTag?
A Mac or Linux computer with Claude, Codex or Pi installed, plus a Slack or Lark workspace where you can chat to openTag. More agents are on the way.
Does openTag store my conversations and code?
By default, openTag's servers do not store your conversations, code or memory. The agent runs on your computer and talks to your model provider directly, connectors such as GitHub or Notion use your own credentials with the smallest scope that does the job, and team memory lives in a Context Tree — markdown in a git repository you host yourself.
How is openTag different from hosted AI agents like Claude Tag or Viktor?
openTag is open source under Apache 2.0, works with any agent, runs local first on Mac and Linux, supports self-hosting with Docker and is free. The website's comparison table lists Claude Tag as Anthropic only with usage-based pricing, and Viktor as a proprietary agent with credit-based pricing.
openTag
Bring Claude Code, Codex or Pi to Slack and Lark. openTag is a free, open source AI coworker that runs on your machine with your own plan or API key.
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