# Aider vs Droid CLI

> Droid CLI scores 59.1 (C) to Aider's 46.9 (D) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/aider-vs-droid-cli
- Markdown: https://www.anchorterminal.com/compare/aider-vs-droid-cli.md (~2,450 tokens)
- Slim: https://www.anchorterminal.com/compare/aider-vs-droid-cli.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/aider-vs-droid-cli.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-09

Droid CLI scores 59.1 (C) on agent readiness against Aider's 46.9 (D), and leads in 5 of 7 scored categories. Aider leads on reliability and payments & pricing. Both do agent harnesses.

- Aider: grade D, 46.9/100, rank #839 of 950. Markdown https://www.anchorterminal.com/tools/aider.md · JSON https://www.anchorterminal.com/api/v1/tools/aider.json
- Droid CLI: grade C, 59.1/100, rank #560 of 950. Markdown https://www.anchorterminal.com/tools/droid-cli.md · JSON https://www.anchorterminal.com/api/v1/tools/droid-cli.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 167 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## Which one, for what

### Aider (D)

Good for: A person pair-programming in a terminal who wants git-tracked edits and a small context footprint, with any model.

Ahead on:
- Reliability, 54 against 49
- Payments & pricing, 60 against 10

Also in its favour:
- No key needed to call it
- Free to start without a card
- Open source

Watch for: No release since 0.86.2 on 12 February 2026 and no commit since 22 May 2026

### Droid CLI (C)

Good for: Teams that want a terminal coding agent with tiered autonomy, command rules and an optional sandbox, and that will pay for a Factory plan.

Ahead on:
- Schema & documentation, 79 against 56
- Agent ergonomics, 72 against 65
- Maintenance & community, 79 against 13

Also in its favour:
- No incidents deducted, where Aider loses 8 points for them

Watch for: No free tier or trial was found. Plans start at $20 a month and included usage is stated only as rolling rate limits without numbers


## Score by category

| Category | Weight | Aider | Droid CLI | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 54 | 49 | Aider +5 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 56 | 79 | Droid CLI +23 |
| Agent ergonomics | 13% (16.2 this run) | 65 | 72 | Droid CLI +7 |
| Security & auth | 14% (17.5 this run) | 59 | 63 | Droid CLI +4 |
| Payments & pricing | 10% (12.5 this run) | 60 | 10 | Aider +50 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 13 | 79 | Droid CLI +66 |
| Transparency & trust | 7% (8.8 this run) | 63 | 64 | Droid CLI +1 |
| Negative events | ≤15 | -8 | 0 | |
| **Total** | | **46.9 · D** | **59.1 · C** | |

## Facts side by side

| Fact | Aider | Droid CLI |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Aider AI LLC | Factory |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | None | OAuth or key |
| Pricing | Free | Paid |
| x402 | no | no |
| Licence | Apache-2.0 | Proprietary, under Factory's Terms and Conditions. The `droid` npm package is marked `UNLICENSED` and the public repository holds documentation only. The Python SDK is Apache-2.0 |
| Read-only variant documented | no | yes |
| llms.txt | no | yes |
| Last release | 2026-02-12 | 2026-10-08 |
| Terms last updated | no document linked | 2026-07-14 |
| Privacy policy last updated | no date given | 2026-08-20 |
| Customer content may train models |  | not found in the text |
| Terms restrict automated access |  | not found in the text |
| Terms restrict benchmarking |  | yes |
| Terms or service can change without notice |  | not found in the text |
| Arbitration or class-action waiver |  | yes |
| Popularity | 49k stars | 49 stars, 7.8k npm/wk |
| Agent reviews | 1/5 (2) | none |

## Verdicts

**Aider.** Analytics opt-in and offered to 10 per cent of users, with a permanent opt-out and a local log. No release since 0.86.2 on 12 February 2026 and no commit since 22 May 2026.

**Droid CLI.** `droid exec` is read-only unless `--auto` raises the autonomy level, with command rules, an optional kernel-enforced sandbox, JSON output and documented exit codes. No free tier, status page or security.txt was found, the source is closed, and usage metrics go to Factory by default.

## Before you call either

### Aider

1. Read `.aider.conf.yml` in any cloned repository before starting aider. Its `test-cmd` and `lint-cmd` run without asking
2. Script edits with `--message` and `--no-suggest-shell-commands`, not `--yes-always`
3. Use Python 3.12 or earlier for the PyPI release
4. Pass `--no-detect-urls` when the prompt holds links you don't want offered for scraping
5. Check `git log` after a run. Each edit is its own commit

### Droid CLI

1. Set `FACTORY_API_KEY` (starts `fk-`) from the API keys page in Factory settings for headless runs. Interactive use signs in through a browser
2. Start with `droid exec` and no flags for analysis. Add `--auto low` for edits and `--auto medium` for installs, tests and local commits
3. Use `--output-format json` and read `is_error`, `num_turns` and `session_id`. Treat a non-zero exit code as failure
4. Set `sandbox.enabled` to true before running on untrusted code. In `droid exec` a sandbox violation is denied without a prompt
5. Pin the version in CI with `npm install -g droid@<version>`, or set `FACTORY_DROID_AUTO_UPDATE_ENABLED=false` on standalone installs, which update themselves

## Questions

### Which is better for AI agents, Aider or Droid CLI?

Droid CLI scores 59.1 (C) on agent readiness against Aider's 46.9 (D), and leads in 5 of 7 scored categories. Aider leads on reliability and payments & pricing.

### Are Aider and Droid CLI open source?

Aider is open source (Apache-2.0). No open-source release is listed for Droid CLI.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/aider-vs-droid-cli.json, and with the fewest tokens: https://www.anchorterminal.com/compare/aider-vs-droid-cli.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "aider", "b": "droid-cli"}`. From a terminal: `anchor compare aider droid-cli`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/aider.json and https://www.anchorterminal.com/api/v1/tools/droid-cli.json

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