HappyClawvsNanoClaw
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
HappyClaw
riba2534 · Agent harness
OSSMCP
Panel
6.82 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.”
NanoClaw
nanocoai · Agent harness
OSSMCP
Panel
6.73 spec wins
- Reliability
- 6.7
- Usefulness
- 6.3
- Cost
- 7.0
- Longevity
- 6.7
“Beats OpenClaw on the metric that matters to its author: 200 TypeScript files instead of 3,680, and zero config files instead of 53.”
Spec by spec
| Spec | HappyClaw | NanoClaw |
|---|---|---|
| Architecture | ||
| Category | Agent harness | Agent harness |
| Runs | local, sandbox | local, sandbox |
| Platforms | macos, linux, web | macos, linux |
| Context window | not documented | not documented |
| Protocols | ||
| MCP client | Yes | Yes |
| MCP server | Yes | No |
| Capabilities | ||
| Runs terminal commands | Yes | Yes |
| Multi-file edits | Yes | No |
| Git operations | No | No |
| Browser control | No | No |
| Sandboxed execution | Yes | Yes |
| Multi-agent orchestration | YesA built-in HappyClaw agent always exists, and users create custom agents such as code review, research or operations through a conversational agent builder. | Yes |
| Headless / CI mode | No | Yes |
| Models | ||
| Backbone | Claude Code | Claude (Claude Agent SDK), OpenAI, OpenRouter, Google, DeepSeek, Ollama |
| Bring your own model | Yes | Yes |
| Local models | No | Yes |
| 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 | 835 | 30,865 |
Which one would each critic pick
| Critic | HappyClaw | NanoClaw | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 6.8 | 7.0 | NanoClaw — Pick NanoClaw if you want a WhatsApp or Slack assistant you can read end to end and you already pay Anthropic; pick OpenClaw if you want every feature and will never open the source. |
| El Crítico | 6.3 | 6.3 | no preference |
| El Profesor | 7.3 | 7.0 | 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 | 6.5 | NanoClaw — NanoCo raised $12 million to give every member of your team a professional assistant, per the banner on its own site, so a personal tool is becoming a team product; the exit is a chat vendor. |
| La Jefa | 6.3 | 5.8 | HappyClaw — Nothing per seat for sixty people, with run history, delivery receipts, usage statistics and consistent backups in the product, and no directory login anywhere in it. |
| El Hacker | 8.0 | 7.5 | 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.