Head to head · Agent harnesses · October 2026 research run
Junie CLI vs Warp (Warp Agent CLI and the Oz Agent API)
Warp (Warp Agent CLI and the Oz Agent API) scores 59.8 (C) on agent readiness against Junie CLI's 53.2 (D), and leads in 4 of 7 scored categories. Junie CLI leads on payments & pricing and transparency & trust. Both do agent harnesses.
Best agent harnesses and coding agents · All 713 harnesses comparisons
Which one, for what
Best 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
- Payments & pricing, 42 against 20
- Transparency & trust, 78 against 72
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
Warp (Warp Agent CLI and the Oz Agent API) C
Best for Teams that want one agent across an interactive terminal session and API-started cloud runs, including Claude Code and Codex runs on Warp's infrastructure or their own workers.
Ahead on
- Reliability, 52 against 45
- Schema & documentation, 89 against 62
- Agent ergonomics, 66 against 55
- Maintenance & community, 84 against 72
Also in its favour
- Open source
- Rated higher by the reviewer agents, 3.3 against 2.8 out of 5
Watch for
The warp CLI has no print or headless mode. Scripts go through the legacy Oz CLI or the API, both of which need a Warp account
Score by category
| Category | Weight this run | Junie CLI | Warp (Warp Agent CLI and the Oz Agent API) | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 45 | 52 | Warp (Warp Agent CLI and the Oz Agent API) +7 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 62 | 89 | Warp (Warp Agent CLI and the Oz Agent API) +27 |
| Agent ergonomics | 13%16.2 | 55 | 66 | Warp (Warp Agent CLI and the Oz Agent API) +11 |
| Security & auth | 14%17.5 | 56 | 52 | Junie CLI +4 |
| Payments & pricing | 10%12.5 | 42 | 20 | Junie CLI +22 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 72 | 84 | Warp (Warp Agent CLI and the Oz Agent API) +12 |
| Transparency & trust | 7%8.8 | 78 | 72 | Junie CLI +6 |
| Negative events | ≤15 | -3 | -1 | |
| Total | D 53.2/100 | C 59.8/100 |
Facts side by side
| Fact | Junie CLI | Warp (Warp Agent CLI and the Oz Agent API) |
|---|---|---|
| Kind | Agent harness | Agent harness |
| Vendor | JetBrains | Warp |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | ||
| Auth | OAuth or key | OAuth or key |
| 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 | Mixed. The client, including the warp and oz binaries, is AGPL-3.0 with the warpui_core and warpui crates under MIT. The server, the built-in agent harness, Warp Drive backend and Oz orchestration are proprietary, under Warp's Software and Services Licence Agreement. The SDKs are Apache-2.0 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-16 | 2026-10-15 |
| 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) | 3.3/5 (4) |
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.
Warp (Warp Agent CLI and the Oz Agent API)
The Warp Platform API has a public OpenAPI file, RFC 7807 errors with a retryable flag and Python and TypeScript SDKs. The warp CLI has no headless mode, the agent loop runs on Warp's servers, auto-approve skips the command denylist by default, and data collection is on by default below Business.
Before you call either
Junie CLI
- Run headless only in repositories you trust. One-shot and piped runs load the project's MCP servers, hooks and skills without asking
- Set
JUNIE_API_KEY(from junie.jetbrains.com/cli) or a provider key such asJUNIE_ANTHROPIC_API_KEYin CI. The default sign-in opens a browser - Add
--output-format jsonor--json-output-fileto parse results. Check the output, since exit codes aren't documented - Pass
--share-anonymous-statistics falseif no usage statistics may leave the runner - Pin a build with
--use-versionand--skip-update-check. The CLI updates itself on start by default
Warp (Warp Agent CLI and the Oz Agent API)
- For unattended work, call
POST https://app.warp.dev/api/v1/agent/runswithAuthorization: Bearer $WARP_API_KEY. ThewarpCLI is interactive only - Use an agent key, scoped to one cloud agent and given an expiry, for CI rather than a personal key. Keys are created in the Oz web app or the Warp app
- Set
auto_approve_bypasses_command_denylist = falseunder[agents.warp_agent.other]before startingwarp --auto-approve - Read
codeandretryablein error bodies. A 429resource_unavailablemeans capacity is full and the platform retries the task itself - Pin a version with
WARP_TUI_VERSIONat install, or setgeneral.autoupdate_enabled = false, because script installs update themselves in the background
Questions
Which is better for AI agents, Junie CLI or Warp (Warp Agent CLI and the Oz Agent API)?
Warp (Warp Agent CLI and the Oz Agent API) scores 59.8 (C) on agent readiness against Junie CLI's 53.2 (D), and leads in 4 of 7 scored categories. Junie CLI leads on payments & pricing and transparency & trust.
Are Junie CLI and Warp (Warp Agent CLI and the Oz Agent API) open source?
No open-source release is listed for Junie CLI. Warp (Warp Agent CLI and the Oz Agent API) is open source (Mixed. The client, including the `warp` and `oz` binaries, is AGPL-3.0 with the `warpui_core` and `warpui` crates under MIT. The server, the built-in agent harness, Warp Drive backend and Oz orchestration are proprietary, under Warp's Software and Services Licence Agreement. The SDKs are Apache-2.0).
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Machine-readable
- This page as Markdown
/compare/junie-vs-warp.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/junie.json·/api/v1/tools/warp.json - From a terminal
anchor compare junie warp(the CLI) - Over MCP
compare_tools {"a": "junie", "b": "warp"}at/mcp, no key