herdrvsOpenChamber
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
herdr
herdr · Agent harness
OSS
Panel
6.31 spec wins
- Reliability
- 6.2
- Usefulness
- 5.7
- Cost
- 7.5
- Longevity
- 6.0
“A tmux for agents whose detach key is ctrl+b q, so twenty years of muscle memory finally counts as onboarding.”
OpenChamber
OpenChamber · Agent harness
OSS
Panel
6.35 spec wins
- Reliability
- 6.2
- Usefulness
- 6.5
- Cost
- 6.0
- Longevity
- 6.5
“Prompts can be scheduled daily, weekly or on a cron, so the agent can now disappoint you on a timetable.”
Spec by spec
| Spec | herdr | OpenChamber |
|---|---|---|
| Architecture | ||
| Category | Agent harness | Agent harness |
| Runs | local | local |
| Platforms | macos, linux, windows | macos, linux, windows, web |
| Context window | not documented | not documented |
| Protocols | ||
| MCP client | No | No |
| MCP server | No | No |
| Capabilities | ||
| Runs terminal commands | Yes | YesCommand execution happens in the OpenCode agent OpenChamber launches; OpenChamber lets you reattach to a running terminal from any paired device. |
| Multi-file edits | No | Yes |
| Git operations | No | YesMulti-run can put each parallel session in its own git worktree, and GitHub sessions can update or merge a pull request from inside OpenChamber. |
| Browser control | No | YesPreview opens the running app beside the conversation, and the desktop build has a built-in browser that can send an element's screenshot, styles and console errors to the agent. |
| Sandboxed execution | No | No |
| Multi-agent orchestration | Yes | YesMulti-run gives one task to up to five models at once and Fusion merges the best parts of their results. |
| Headless / CI mode | No | No |
| Models | ||
| Backbone | Claude Code, Codex, Cursor, OpenCode, Grok | OpenCode |
| Bring your own model | No | Yes |
| Local models | No | No |
| Cost | ||
| Pricing model | byok | byok |
| Starts at | $0/mo | $0/mo |
| Free tier | Yes | Yes |
| Bring your own key | No | Yes |
| Openness | ||
| Open source | Yes | Yes |
| License | Apache-2.0 | MIT |
| GitHub stars | 41,859 | 11,015 |
Which one would each critic pick
| Critic | herdr | OpenChamber | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 7.0 | 6.3 | herdr — Pick herdr if your Claude Code, Codex, Cursor or OpenCode sessions die when you close the laptop; pick Claude Squad if what you actually need is a worktree per task. |
| El Crítico | 6.0 | 5.5 | herdr — Agents can spawn panes and prompt other agents on one host with no sandbox and no worktrees, so a chain of agents shares one working tree and one set of permissions. |
| El Profesor | 6.8 | 6.8 | no preference |
| La Inversora | 4.8 | 6.5 | OpenChamber — 9,556 stars and over twenty-three thousand editor installations from a repository that did not exist before September 2025, with nothing charged for any of it. |
| La Jefa | 5.5 | 6.0 | OpenChamber — Self-hosted with an encrypted relay paired by scanning a code, which answers where the data goes and opens the question of whose phone is holding it. |
| El Hacker | 8.0 | 6.8 | herdr — Apache-2.0, one binary via brew or mise, a socket API I can script from anything, no MCP and no model settings because it owns terminals, not agents. |
Picks are derived from each critic's own scores. Humans vote on matchups on the duels page.