Agent Pets vs Herdr
Updated 22 October 2026
Herdr is a free terminal “agent multiplexer”: think tmux for coding agents, with workspaces, tabs and panes, and a view of which agents are blocked or working. Agent Pets is a Chrome extension that turns every Claude Code, Codex, OpenCode and omp session into a pet walking along the bottom of the page you’re on. Herdr is where you run agents; Agent Pets is how you keep an eye on them from the browser.
The short answer
| Herdr | Agent Pets | |
|---|---|---|
| What it is | A terminal multiplexer for agents: workspaces, tabs, panes | Pets for your sessions in the browser |
| Where it shows status | In the terminal: which agents are blocked or working | Pets on every page in Chrome/Chromium, a toolbar badge and desktop notifications |
| Agents supported | 22 agent CLIs detected, per its site | Claude Code, Codex, OpenCode, omp |
| Approve from it | In the agent’s pane, in the terminal | Yes: Claude Code, Codex and OpenCode, from the pet or its notification |
| Reply from it | In the agent’s pane, in the terminal | Yes, from the pet |
| Price | Free | $6 one-time early bird (regularly $25) |
| Runs where | The terminal, on your machine or over ssh | Chrome extension + a local helper on your machine |
When to pick Herdr
- You want to organise lots of agents in the terminal with workspaces, tabs and panes.
- You use agent CLIs beyond Claude Code, Codex, OpenCode and omp.
- You work over ssh on a remote machine.
- You want something free with a big community: its site lists 1,297 community plugins.
When to pick Agent Pets
- You spend the wait in Chrome, Arc, Brave or Edge, away from the terminal.
- You want to see the exact command and answer Allow or Deny from the page you’re on.
- You want to read the latest answer and send the next message without switching windows.
Get Agent Pets — was $25, now $6Get Agent Pets — $25
Using both together
They fit together well. Run your agents in Herdr panes so the terminal stays organised, and let Agent Pets watch the Claude Code, Codex, OpenCode and omp sessions from the browser. When a pet asks for approval, answer it on the page; when you want the full picture, switch back to Herdr.
Questions
What is Herdr?
A free terminal agent multiplexer, like tmux for coding agents. It gives you workspaces, tabs and panes and shows which agents are blocked or working. It runs on your machine or over ssh.
Does Agent Pets replace Herdr?
No. Herdr is where you run and arrange agents in the terminal; Agent Pets shows those sessions as pets in Chrome so you can approve and reply from the browser.
Which supports more agents?
Herdr. Its site says it detects 22 agent CLIs. Agent Pets supports Claude Code, Codex, OpenCode and omp.
Is Herdr free?
Yes, Herdr is free. Agent Pets is a one-time purchase ($6 early bird, regularly $25) and runs locally with no account.
Sources: Herdr’s website.