AgentOSvsOpenFang
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
AgentOS
Smart Computer · Agent harness
OSS
Panel
5.51 spec wins
- Reliability
- 6.0
- Usefulness
- 4.2
- Cost
- 7.2
- Longevity
- 4.7
“Propose, shadow, approve, apply, execute, receipt, audit: seven gates for the agent, and none for the human who typed the prompt.”
OpenFang
RightNow AI · Agent harness
OSSMCP
Panel
5.34 spec wins
- Reliability
- 4.2
- Usefulness
- 5.5
- Cost
- 7.5
- Longevity
- 4.2
“One of the bundled agents does lead generation, so your inbox is about to be introduced to a 32MB Rust binary.”
Spec by spec
| Spec | AgentOS | OpenFang |
|---|---|---|
| Architecture | ||
| Category | Agent harness | Agent harness |
| Runs | local | local |
| Platforms | macos, linux | macos, linux, windows |
| Context window | not documented | not documented |
| Protocols | ||
| MCP client | No | Yes |
| MCP server | No | Yes |
| Capabilities | ||
| Runs terminal commands | Yes | Yes |
| Multi-file edits | Yes | No |
| Git operations | No | No |
| Browser control | No | Yes |
| Sandboxed execution | No | No |
| Multi-agent orchestration | Yes | Yes |
| Headless / CI mode | No | No |
| Models | ||
| Backbone | multiple providers | any |
| Bring your own model | Yes | Yes |
| Local models | No | No |
| Cost | ||
| Pricing model | byok | byok |
| Starts at | $0/mo | n/a |
| Free tier | Yes | Yes |
| Bring your own key | Yes | Yes |
| Openness | ||
| Open source | Yes | Yes |
| License | Apache-2.0 | Apache-2.0 |
| GitHub stars | 216 | 18,210 |
Which one would each critic pick
| Critic | AgentOS | OpenFang | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 5.5 | 5.5 | no preference |
| El Crítico | 5.3 | 4.8 | AgentOS — Workflows request declared effects and adapters answer, so anything nobody wrote an adapter for is not merely hard, it is unreachable. |
| El Profesor | 6.3 | 5.3 | AgentOS — A single-threaded deterministic kernel whose worlds replay to identical state from an event log is a verification property, not a capability claim. |
| La Inversora | 5.0 | 5.3 | OpenFang — Eighteen thousand stars since February 2026 and no price of any kind, with twenty-six providers and forty channels standing in for a moat that is really an integration list. |
| La Jefa | 5.0 | 4.0 | AgentOS — Zero per seat across sixty desks, a signed receipt for every action, and no console, no SSO and nothing that runs unattended. |
| El Hacker | 6.0 | 7.3 | OpenFang — Apache-2.0 Rust in a single binary, an MCP client and server on the same process, installed by curl, and no local model option, which is the one thing missing. |
Picks are derived from each critic's own scores. Humans vote on matchups on the duels page.