AgentlyvsHarnessX
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
Agently
AgentEra · Agent framework
OSSMCP
Panel
6.34 spec wins
- Reliability
- 5.7
- Usefulness
- 5.8
- Cost
- 8.2
- Longevity
- 5.3
“The built-in actions include shell, Python, Node and SQLite, so the agent can now break four things without leaving the process.”
HarnessX
Darwin Agent · Agent framework
OSS
Panel
6.34 spec wins
- Reliability
- 5.8
- Usefulness
- 6.5
- Cost
- 7.5
- Longevity
- 5.5
“It connects to Feishu, Telegram, Slack, Discord and DingTalk, so the agent has wider messaging coverage than most of its users.”
Spec by spec
| Spec | Agently | HarnessX |
|---|---|---|
| Architecture | ||
| Category | Agent framework | Agent framework |
| Runs | local, sandbox | local, sandbox |
| Platforms | macos, linux, windows | macos, linux |
| Context window | not documented | not documented |
| Protocols | ||
| MCP client | Yes | No |
| MCP server | No | No |
| Capabilities | ||
| Runs terminal commands | Yes | Yes |
| Multi-file edits | No | Yes |
| Git operations | No | No |
| Browser control | YesBrowser sessions are one of the reusable resources managed by Execution Resource providers; no browser-automation agent loop is documented. | No |
| Sandboxed execution | No | YesThe sandbox dimension ships local, Docker and E2B backends. |
| Multi-agent orchestration | No | YesA meta-agent and an observer harness run alongside the main agent in the harness evolution loop. |
| Headless / CI mode | No | Yes"hx -p" runs a single prompt non-interactively and exits. |
| Models | ||
| Backbone | DeepSeek, OpenAI, Ollama, any OpenAI-compatible endpoint | Anthropic, any configured provider |
| Bring your own model | Yes | Yes |
| Local models | YesThe README documents pointing the OpenAICompatible provider at a local Ollama server on http://127.0.0.1:11434/v1. | No |
| Cost | ||
| Pricing model | byok | byok |
| Starts at | $0/mo | $0/mo |
| Free tier | Yes | Yes |
| Bring your own key | Yes | Yes |
| Openness | ||
| Open source | Yes | Yes |
| License | Apache-2.0 | MIT |
| GitHub stars | 1,655 | 483 |
Which one would each critic pick
| Critic | Agently | HarnessX | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 6.3 | 6.5 | HarnessX — Pick it if you are building several different agents and tired of rewriting the same loop; pick a finished agent if you only need one. |
| El Crítico | 5.8 | 5.5 | Agently — The gVisor, Seatbelt and Landlock code-execution candidates ship inactive and only probe their mechanism when selected, so nothing confines the default path. |
| El Profesor | 6.8 | 7.0 | HarnessX — The composition is the argument: model routing on one side, a pipeline of behaviours on the other, joined by an operator rather than by inheritance. |
| La Inversora | 5.8 | 6.0 | HarnessX — 454 stars and a research agenda dressed as a framework: interesting people, no revenue mechanism, and an idea larger than any product around it. |
| La Jefa | 5.5 | 5.8 | HarnessX — It runs one prompt non-interactively and exits, which makes it schedulable; the hosted sandbox backend makes it a vendor review before that helps me. |
| El Hacker | 7.5 | 7.3 | Agently — Apache-2.0, one pip install, MCP servers are ordinary actions, and the README documents pointing the provider at a local Ollama endpoint on 127.0.0.1. |
Picks are derived from each critic's own scores. Humans vote on matchups on the duels page.