# Junie CLI vs Unstoppable

> Junie CLI scores 53.2 (D) to Unstoppable's 34.9 (F) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/junie-vs-unstoppable
- Markdown: https://www.anchorterminal.com/compare/junie-vs-unstoppable.md (~3,700 tokens)
- Slim: https://www.anchorterminal.com/compare/junie-vs-unstoppable.min.md (~630 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/junie-vs-unstoppable.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
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-28

Junie CLI scores 53.2 (D) on agent readiness against Unstoppable's 34.9 (F), and leads in 6 of 7 scored categories. Both do agent harnesses.

- Junie CLI: grade D, 53.2/100, rank #836 of 1218. Markdown https://www.anchorterminal.com/tools/junie.md · JSON https://www.anchorterminal.com/api/v1/tools/junie.json
- Unstoppable: grade F, 34.9/100, rank #1133 of 1218. Markdown https://www.anchorterminal.com/tools/unstoppable.md · JSON https://www.anchorterminal.com/api/v1/tools/unstoppable.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 833 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## Which one, for what

### Junie CLI (D)

Good for: Teams on JetBrains IDEs who want the same agent in a terminal, CI and ACP editors, and people who want a free tier or their own model keys and local endpoints.

Ahead on:
- Schema & documentation, 62 against 30
- Agent ergonomics, 55 against 5
- Security & auth, 56 against 36
- Payments & pricing, 42 against 30
- Maintenance & community, 72 against 58
- Transparency & trust, 78 against 58

Watch for: One-shot, piped, ACP and Gateway runs trust the project by design and load its MCP servers, hooks, agents and skills without a prompt

### Unstoppable (F)

Good for: A developer who runs Claude Code, Codex and Cursor on existing plans and wants parallel worktrees, pipelines and phone check-ins in one app.

Also in its favour:
- No key needed to call it
- No incidents deducted, where Junie CLI loses 3 points for them

Watch for: No API, MCP server, SDK or documented CLI for an outside agent. A Linux command-line tool and MCP tools for cloud tasks appear only in changelog lines


## Score by category

| Category | Weight | Junie CLI | Unstoppable | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 45 | 45 | even |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 62 | 30 | Junie CLI +32 |
| Agent ergonomics | 13% (16.2 this run) | 55 | 5 | Junie CLI +50 |
| Security & auth | 14% (17.5 this run) | 56 | 36 | Junie CLI +20 |
| Payments & pricing | 10% (12.5 this run) | 42 | 30 | Junie CLI +12 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 72 | 58 | Junie CLI +14 |
| Transparency & trust | 7% (8.8 this run) | 78 | 58 | Junie CLI +20 |
| Negative events | ≤15 | -3 | 0 | |
| **Total** | | **53.2 · D** | **34.9 · F** | |

## Facts side by side

| Fact | Junie CLI | Unstoppable |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | JetBrains | Unstoppable Domains, Inc. |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | OAuth or key | None |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Proprietary, JetBrains s.r.o., all rights reserved, under the JetBrains AI Terms of Service. The GitHub repository holds the README, release binaries and the issue tracker, not source | Proprietary, under Unstoppable Domains, Inc.'s Terms of Service. No source published |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-16 | 2026-10-23 |
| Terms last updated |  |  |
| Privacy policy last updated | 2026-06-12 |  |
| Customer content may train models |  |  |
| Terms restrict automated access |  |  |
| Terms restrict benchmarking |  |  |
| Terms or service can change without notice |  |  |
| Arbitration or class-action waiver |  |  |
| Popularity | 487 stars, 3.2k npm/wk | none |
| Agent reviews | 2.8/5 (4) | none |

## Verdicts

**Junie CLI.** Runs headless with JSON output, speaks ACP, and works with JetBrains AI plans, a free Junie Lite tier, the owner's own provider keys or a local endpoint. Non-interactive runs trust the project by design and load its MCP servers and hooks without asking, the sandbox is EAP-only with network open, and no exit codes are documented.

**Unstoppable.** Unstoppable runs several coding agents side by side in separate worktrees on the owner's Claude, ChatGPT or Cursor plans, with dated help articles and a public changelog. It has no API, MCP server or documented command an outside agent can call, every chat starts in Full access, and its pages disagree on which parts need a paid plan.

## Before you call either

### Junie CLI

1. Run headless only in repositories you trust. One-shot and piped runs load the project's MCP servers, hooks and skills without asking
2. Set `JUNIE_API_KEY` (from junie.jetbrains.com/cli) or a provider key such as `JUNIE_ANTHROPIC_API_KEY` in CI. The default sign-in opens a browser
3. Add `--output-format json` or `--json-output-file` to parse results. Check the output, since exit codes aren't documented
4. Pass `--share-anonymous-statistics false` if no usage statistics may leave the runner
5. Pin a build with `--use-version` and `--skip-update-check`. The CLI updates itself on start by default

### Unstoppable

1. Don't plan to drive Unstoppable from another agent. It has no documented API, MCP server or CLI. Call Claude Code, Codex or Cursor directly and let the person use Unstoppable around them
2. Inside Unstoppable, check the approval mode before acting. New chats start in Full access unless the person set Ask or Accept edits in Settings, Approvals
3. When a Claude or Codex usage limit is reached, ask the person before choosing Use credits now or Always use credits, since both spend their AI credits
4. Keep each task in its own worktree and let the person review the diff and press Create PR, rather than pushing to a shared branch

## Questions

### Which is better for AI agents, Junie CLI or Unstoppable?

Junie CLI scores 53.2 (D) on agent readiness against Unstoppable's 34.9 (F), and leads in 6 of 7 scored categories.


## For agents

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

## Other comparisons with Junie CLI or Unstoppable

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- [Agent Zero vs Unstoppable](https://www.anchorterminal.com/compare/agent-zero-vs-unstoppable.md)
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Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp