Head to head / Harness
Aider vs Pi
Aider: Open-source AI pair programming in the terminal, with git-aware edits and multi-model support. Pi: Minimal, extensible terminal agent from Earendil Works, designed to be customized.
| Fact | Harness | Harness |
|---|---|---|
| Kind | Harness | Harness |
| Status | Active | Active |
| Source | Open source | Open source |
| License | Apache-2.0 | MIT |
| Pricing | Free · Free | Free · Free |
| Model access | Your subscription, Your API key, Local models | Your subscription, Your API key, Local models |
| Platforms | macOS, Linux, Windows | macOS, Linux, Windows, Android |
| Interfaces | CLI, Web | CLI, TUI, API |
| Install | curl -LsSf https://aider.chat/install.sh | sh | npm install -g --ignore-scripts @earendil-works/pi-coding-agent |
| GitHub | ★ 49.6k · checked 2026-10-18 | ★ 116k · 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