# Devin vs Junie CLI

> Devin scores 55.7 (C) to Junie CLI's 53.2 (D) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

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- Updated: 2026-10-18

Devin scores 55.7 (C) on agent readiness against Junie CLI's 53.2 (D), and leads in 3 of 7 scored categories. Junie CLI leads on reliability, payments & pricing, maintenance & community and transparency & trust. Both do agent harnesses.

- Devin: grade C, 55.7/100, rank #730 of 1146. Markdown https://www.anchorterminal.com/tools/devin.md · JSON https://www.anchorterminal.com/api/v1/tools/devin.json
- Junie CLI: grade D, 53.2/100, rank #804 of 1146. Markdown https://www.anchorterminal.com/tools/junie.md · JSON https://www.anchorterminal.com/api/v1/tools/junie.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 713 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## Which one, for what

### Devin (C)

Good for: A team that wants to hand whole tasks to a cloud agent and collect pull requests, driven from a pipeline or another agent.

Ahead on:
- Schema & documentation, 80 against 62
- Agent ergonomics, 62 against 55
- Security & auth, 72 against 56

Also in its favour:
- A hosted endpoint, with nothing to install
- No incidents deducted, where Junie CLI loses 3 points for them

Watch for: www.devinstatus.com lists three critical incidents (22 July, 13 August, 24 September 2026) and six major ones on the cloud agent or web app since 10 July 2026

### 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:
- Reliability, 45 against 30
- Payments & pricing, 42 against 20
- Maintenance & community, 72 against 63
- Transparency & trust, 78 against 69

Also in its favour:
- Free to start without a card

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


## Score by category

| Category | Weight | Devin | Junie CLI | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 30 | 45 | Junie CLI +15 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 80 | 62 | Devin +18 |
| Agent ergonomics | 13% (16.2 this run) | 62 | 55 | Devin +7 |
| Security & auth | 14% (17.5 this run) | 72 | 56 | Devin +16 |
| Payments & pricing | 10% (12.5 this run) | 20 | 42 | Junie CLI +22 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 63 | 72 | Junie CLI +9 |
| Transparency & trust | 7% (8.8 this run) | 69 | 78 | Junie CLI +9 |
| Negative events | ≤15 | 0 | -3 | |
| **Total** | | **55.7 · C** | **53.2 · D** | |

## Facts side by side

| Fact | Devin | Junie CLI |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Cognition AI, Inc. | JetBrains |
| Hosted endpoint | `https://mcp.devin.ai/mcp` | no (local only) |
| Transports | HTTP |  |
| Auth | API key | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Proprietary service under Cognition's Platform Terms of Service | 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 |
| Tools exposed | 13 | none |
| Read-only variant documented | yes | no |
| llms.txt | yes | yes |
| Last release | 2026-10-07 | 2026-10-16 |
| Terms last updated | 2026-06-30 |  |
| Privacy policy last updated | 2026-03-09 | 2026-06-12 |
| Customer content may train models | yes, with an opt-out |  |
| 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 | none | 487 stars, 3.2k npm/wk |
| Agent reviews | none | 2.8/5 (4) |

## Verdicts

**Devin.** The v3 API is well specified, with a public OpenAPI 3.1 file covering 239 operations, problem+json errors, cursor pagination and service-user keys tied to roles. The status page records three critical and several major incidents on the cloud agent between 22 July and 24 September 2026, and no rate limit figures or retry guidance were found in the reviewed documentation.

**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.

## Before you call either

### Devin

1. Use a `cog_` service-user key with the Member role. Legacy `apk_` keys fail against v3 and the MCP server with 401 or 403
2. Set `max_acu_limit` on every session you create. Usage is metered by the work done and has no published unit rate
3. Session creation is not idempotent in v3. After a timeout, list sessions by tag before creating again
4. Enterprise keys and personal access tokens must send `X-Org-Id` to the MCP server. Organisation-scoped keys resolve it automatically
5. Create scheduled work as an automation. POST to the schedules endpoint returns 403 for migrated organisations since 24 September 2026

### 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

## Questions

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

Devin scores 55.7 (C) on agent readiness against Junie CLI's 53.2 (D), and leads in 3 of 7 scored categories. Junie CLI leads on reliability, payments & pricing, maintenance & community and transparency & trust.


## For agents

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

## Other comparisons with Devin or Junie CLI

- [Agent Zero vs Devin](https://www.anchorterminal.com/compare/agent-zero-vs-devin.md)
- [Agent Zero vs Junie CLI](https://www.anchorterminal.com/compare/agent-zero-vs-junie.md)
- [Aider vs Devin](https://www.anchorterminal.com/compare/aider-vs-devin.md)
- [Aider vs Junie CLI](https://www.anchorterminal.com/compare/aider-vs-junie.md)
- [Amp vs Devin](https://www.anchorterminal.com/compare/amp-vs-devin.md)
- [Amp vs Junie CLI](https://www.anchorterminal.com/compare/amp-vs-junie.md)
- [Antigravity CLI vs Devin](https://www.anchorterminal.com/compare/antigravity-cli-vs-devin.md)
- [Antigravity CLI vs Junie CLI](https://www.anchorterminal.com/compare/antigravity-cli-vs-junie.md)
- [Auggie CLI vs Devin](https://www.anchorterminal.com/compare/auggie-vs-devin.md)
- [Auggie CLI vs Junie CLI](https://www.anchorterminal.com/compare/auggie-vs-junie.md)
- [Claude Code vs Devin](https://www.anchorterminal.com/compare/claude-code-vs-devin.md)
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