Your subscription.
No model lock-in.
Your open source
AI coworker.
Talk to openTag in 
Slack and 
Lark with no AI provider lock-in.
@openTag
Message #general
Used by engineers at
OpenAI
Google
OpenAIGoogleYour way of working
Your AI coworker.
From Slack talk to AI agents that run on your own machine and use your model provider of choice.
Your machine.
Run agents locally.
Your coworker.
Customise agent profiles.
How it works
From a tag to a finished task.
1Create agent
2Prepare computer
3Connect messaging
Create your agent
Agent name
openTag
Agent runtime
CodexOpenAI
Claude CodeAnthropic
PiMulti-provider
Create Agent
Create agent
2Prepare computer
3Connect messaging
Connect your computer
Your agent runs on your computer; messages and results pass through openTag.
Your computerNot connected
Paste the connection command into your coding assistant on your computer.
Connection command · illustration
opentag connect --server https://app.opentag.build
--token <connection-token>
Waiting for your computer…
Continue
Create agent
Prepare computer
3Connect messaging
Connect messaging
Choose your messaging app and add your agent to the workspace.
Lark
Slack
Connect Lark
Works with the agents you use.
Power openTag with your agent subscription plan.
Coming soon
Connected work
Connect your stack.
openTag agents connect to over 1000 of the most popular services.
GitHub
Shared knowledge
Memory that’s yours.
Share team memory across your AI agents with Context Tree, a portable, file-based, git-backed memory layer, hosted in your GitHub organization.
File-basedReadable, portable, future-proof.
Git-backedVersioned and collaborative.
In your GitHub organizationPrivate and under your control.
team-memory
goals.md
decisions.md
patterns.md
goals.md
# Team goals
– Build useful AI coworkers
The most configurable AI coworker.
| Capability | openTag | Claude Tag | Viktor |
|---|---|---|---|
| Open source | Apache 2.0 | ||
| Team mode | Invite your agent to team channels | ||
| Agents | Any agent | Anthropic only | Proprietary agent |
| Bring your own subscription | Any API key, Claude & Codex subscriptions | DMs only | Not stated publicly |
| Local first | Mac, Linux | ||
| Self-host | Docker | ||
| Pricing | Free | Usage based | Credit based |
From the people using it
Loved by builders.
“It's like I've 10x'd my startup's headcount, overnight”
Bruce ZSerial Entrepreneur“AI workers have never felt more seamless”
BrandonSoftware Engineer, Guazi“I tag it, get on with my day, and shit gets done”
Angela FUI/UX Designer, ByteDance“Finally, truly customisable AI workers. And free!”
JoshPlatform Engineer, Adobe“Agents triage my repo's issues and open PRs while I sleep. For a solo maintainer, that's huge.”
Sam HOpen-Source Maintainer“Now I can use my ChatGPT subscription to pay for a whole team of AI workers”
SammySoftware Engineer, Meta
FAQs
Can I use my existing AI subscriptions 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. For shared workspaces we recommend using an API key.
What do I need to use openTag?
A Mac or Linux computer with Claude, Codex or Pi installed, and Slack or Lark workspace where you can chat to openTag. More agents are on the way.
How does openTag work?
You mention openTag in a thread, and 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. The work happens on your computer and the reply is sent back to the thread.
What about data and privacy?
By default, openTag's servers don't store your conversations, code, or memory. The agent runs on your computer and talks to your model provider directly, and connectors like GitHub or Notion use your own credentials with the smallest scope that does the job. Team memory lives in a Context Tree, which is markdown in a git repository you host yourself.
How much does openTag cost?
openTag is free to use. You pay for your own AI use with your existing provider subscription.
Can my whole team use openTag?
Yes, one agent serves a channel and anyone in it can mention it. Agents can also hand work to each other and check on each other's progress. For shared workspaces we recommend using an API key.
Which messaging apps does openTag support?
Slack and Lark. Teams and Discord support is on the roadmap.
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.