DeerFlowvsHappyClaw
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
DeerFlow
ByteDance · Agent harness
OSSMCP
Panel
6.74 spec wins
- Reliability
- 6.2
- Usefulness
- 6.8
- Cost
- 7.2
- Longevity
- 6.7
“Serves its web UI on port 2026, so at least one line of the roadmap has a date.”
HappyClaw
riba2534 · Agent harness
OSSMCP
Panel
6.81 spec wins
- Reliability
- 6.5
- Usefulness
- 6.8
- Cost
- 7.8
- Longevity
- 6.0
“It answers on Feishu, Telegram, QQ, DingTalk, WeChat, WeCom, Discord and WhatsApp, so the agent is now unreachable in eight places at once.”
Spec by spec
| Spec | DeerFlow | HappyClaw |
|---|---|---|
| Architecture | ||
| Category | Agent harness | Agent harness |
| Runs | local, sandbox | local, sandbox |
| Platforms | macos, linux, windows | macos, linux, web |
| Context window | not documented | not documented |
| Protocols | ||
| MCP client | Yes | Yes |
| MCP server | No | Yes |
| Capabilities | ||
| Runs terminal commands | Yes | Yes |
| Multi-file edits | Yes | Yes |
| Git operations | No | No |
| Browser control | Yes | No |
| Sandboxed execution | Yes | Yes |
| Multi-agent orchestration | Yes | YesA built-in HappyClaw agent always exists, and users create custom agents such as code review, research or operations through a conversational agent builder. |
| Headless / CI mode | Yes | No |
| Models | ||
| Backbone | OpenAI, Anthropic, Google Gemini, Qwen, Doubao, DeepSeek, Kimi, GLM, MiniMax, OpenRouter, vLLM | Claude Code |
| Bring your own model | Yes | Yes |
| Local models | Yes | 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 | MIT | MIT |
| GitHub stars | 83,325 | 835 |
Which one would each critic pick
| Critic | DeerFlow | HappyClaw | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 7.0 | 6.8 | DeerFlow — Pick DeerFlow if you want a self-hosted agent with a web UI, sandboxes and chat channels and you are fine with make; pick Manus if you would rather someone else host it. |
| El Crítico | 6.3 | 6.3 | no preference |
| El Profesor | 6.5 | 7.3 | HappyClaw — State is decomposed into three lifetimes: an agent holds identity and policy, a workspace holds files and credentials, a session holds only conversation context. |
| La Inversora | 6.3 | 6.3 | no preference |
| La Jefa | 6.5 | 6.3 | DeerFlow — The backend docs include SSO.md for OIDC, an AUTH_DESIGN with per-user isolation and personal access tokens, and a multi-worker gateway that needs Postgres and Redis: self-hosted, but real. |
| El Hacker | 7.8 | 8.0 | HappyClaw — MIT, self-hosted in a container, and it is both an MCP client and an MCP server, with the servers scoped per workspace alongside that workspace's own credentials. |
Picks are derived from each critic's own scores. Humans vote on matchups on the duels page.