ArborvsCoder
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
Arbor
penso · Agent harness
OSSMCP
Panel
7.20 spec wins
- Reliability
- 7.0
- Usefulness
- 7.0
- Cost
- 8.7
- Longevity
- 6.0
“It manages your repositories, your worktrees, your terminals and your processes, so the only unmanaged thing left in the room is you.”
Coder
Coder Technologies · Agent harness
OSSMCP
Panel
7.63 spec wins
- Reliability
- 7.8
- Usefulness
- 7.3
- Cost
- 7.2
- Longevity
- 8.2
“It sells you the room your agent works in, which is the oldest business in software wearing new vocabulary.”
Spec by spec
| Spec | Arbor | Coder |
|---|---|---|
| Architecture | ||
| Category | Agent harness | Agent harness |
| Runs | local | cloud, sandbox |
| Platforms | macos, linux, windows, web | macos, linux, windows, web |
| Context window | not documented | not documented |
| Protocols | ||
| MCP client | Yes | Yes |
| MCP server | Yes | Yes |
| Capabilities | ||
| Runs terminal commands | Yes | Yes |
| Multi-file edits | Yes | Yes |
| Git operations | Yes | Yes |
| Browser control | No | No |
| Sandboxed execution | No | Yes |
| Multi-agent orchestration | Yes | Yes |
| Headless / CI mode | No | Yes |
| Models | ||
| Backbone | Claude Code, Codex, OpenCode | any |
| Bring your own model | Yes | YesCoder runs whichever agent and model the team chooses; the AI Governance gateway brokers the LLM calls rather than supplying a model. |
| Local models | YesOllama appears among the providers Arbor can be pointed at. | YesThe whole platform is self-hosted, so an on-premises or in-VPC model endpoint can be used through the AI Governance gateway. |
| Cost | ||
| Pricing model | byok | mixed |
| Starts at | $0/mo | $0/mo |
| Free tier | Yes | Yes |
| Bring your own key | Yes | Yes |
| Openness | ||
| Open source | Yes | Yes |
| License | MIT | AGPL-3.0 |
| GitHub stars | 831 | 16,807 |
Which one would each critic pick
| Critic | Arbor | Coder | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 7.5 | 7.5 | no preference |
| El Crítico | 6.8 | 6.8 | no preference |
| El Profesor | 7.5 | 7.5 | no preference |
| La Inversora | 6.8 | 8.0 | Coder — A copyleft core with a per-user Premium tier and a custom enterprise tier, and the licence is the moat because it blocks anyone hosting this against them. |
| La Jefa | 6.3 | 7.3 | Coder — The premium tier is priced per user annually with no published figure, which is contact sales wearing a plan name, and everything else here answers my questionnaire. |
| El Hacker | 8.3 | 8.8 | Coder — AGPL-3.0, a one-line install script, its own protocol server plus an API, and every workspace runs on hardware I racked with a model endpoint I chose. |
Picks are derived from each critic's own scores. Humans vote on matchups on the duels page.