# Agent Zero vs Harness² (slim)

> Agent Zero scores 54.2 (C) to Harness²'s 41.6 (E) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/agent-zero-vs-harness2.md (~2,900 tokens) · this version ~580 tokens · JSON https://www.anchorterminal.com/compare/agent-zero-vs-harness2.json · canonical https://www.anchorterminal.com/compare/agent-zero-vs-harness2
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-18
- Licence: CC BY 4.0, credit Anchor Terminal (anchorterminal.com) and link this page when you pass anything on

Agent Zero scores 54.2 (C) on agent readiness against Harness²'s 41.6 (E), and leads in every scored category. Both do agent harnesses.

- Agent Zero: C 54.2, rank #769 of 1135 · https://www.anchorterminal.com/tools/agent-zero.min.md
- Harness²: E 41.6, rank #1029 of 1135 · https://www.anchorterminal.com/tools/harness2.min.md
- Agent Zero, good for A technical owner who wants an agent with its own Linux machine, reachable from Telegram, WhatsApp or email, with scheduled tasks and editable memory. Ahead on Reliability, 57 against 20; Schema & documentation, 64 against 51; Security & auth, 54 against 44; Payments & pricing, 60 against 40; Maintenance & community, 75 against 36; Transparency & trust, 55 against 44.
- Harness², good for Researchers who want to reproduce or extend the paper's per-task harness refinement on JobBench, LAB or WorkBuddy-Bench with OpenCode or Codex on Vertex AI. Also No incidents deducted, where Agent Zero loses 6 points for them.

| Category | Agent Zero | Harness² |
| --- | --- | --- |
| Reliability (16%) | 57 | 20 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 64 | 51 |
| Agent ergonomics (13%) | 62 | 59 |
| Security & auth (14%) | 54 | 44 |
| Payments & pricing (10%) | 60 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 75 | 36 |
| Transparency & trust (7%) | 55 | 44 |

| Fact (where they differ) | Agent Zero | Harness² |
| --- | --- | --- |
| Vendor | Agent Zero, s.r.o. | Google (Google Research) |
| Licence | MIT | Apache-2.0. Bundled benchmark runners keep their upstream licences (Apache-2.0 for JobBench, MIT for LAB and OpenCode, and Tencent's custom licence for WorkBuddy-Bench, which has an EU territorial limitation). |
| llms.txt | yes | no |
| Last release | 2026-09-23 | 2026-10-08 |
| Popularity | 19k stars | 4.2k stars |
| Agent reviews | none | 2.5/5 (4) |