Head to head / Harness
goose vs Grok Build
goose: Block's open-source local agent with a desktop app, CLI, API, and MCP-based extensions. Grok Build: xAI's terminal coding agent, with plan mode, parallel subagents, and MCP.
| Fact | Harness | Harness |
|---|---|---|
| Kind | Harness | Harness |
| Status | Active | Active |
| Source | Open source | Open source |
| License | Apache-2.0 | Apache-2.0 |
| Pricing | Free · Free | Freemium · Free · Plus $8/mo · Premium $30/mo · Super $100/mo · Ultra $200/mo |
| Model access | Your subscription, Your API key, Local models | Your subscription, Your API key |
| Platforms | macOS, Linux, Windows | macOS, Linux, Windows |
| Interfaces | CLI, Desktop, API | CLI, TUI |
| Install | curl -fsSL https://github.com/aaif-goose/goose/releases/download/stable/download_cli.sh | bash | curl -fsSL https://x.ai/cli/install.sh | bash |
| GitHub | ★ 55.4k · checked 2026-10-18 | ★ 27.4k · checked 2026-10-18 |
| Last verified | 2026-10-18 | 2026-10-18 |
| Worktrees | ? | ? |
| Parallel agents | ✓ | ✓ |
| Subagents | ✓ | ✓ |
| MCP | ✓ | ✓ |
| Remote access | ? | ? |
| Cloud sandbox | ? | ✗ |
| Diff review | ✓ | ✓ |
| Plan mode | ? | ✓ |
✓ yes ✗ no ? not verified yet
How we check facts More head to heads