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Head to head · Agent harnesses · October 2026 research run

Junie CLI vs OpenMausBot

OpenMausBot scores 65.4 (B) on agent readiness against Junie CLI's 53.1 (D), and leads in 6 of 7 scored categories. Junie CLI leads on transparency & trust. Both do agent harnesses.

Best agent harnesses and coding agents · All 875 harnesses comparisons

Junie CLIJetBrains · Agent harness D53.1/100#860 of 1238 OpenMausBotSupamaus Software Private Limited · Agent harness B65.4/100#368 of 1238

Which one, for what

Junie CLI D

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

  • Transparency & trust, 77 against 59

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

OpenMausBot B

Best for A person or an outside agent who wants several CLI agents (Claude Code, Codex, Grok, ACP CLIs) organised as named bots with their own computers, routines and approvals, driven by MCP or a CLI.

Ahead on

  • Reliability, 60 against 45
  • Schema & documentation, 90 against 62
  • Agent ergonomics, 77 against 55
  • Payments & pricing, 50 against 42

Also in its favour

  • Runs on your own machine
  • Open source

Watch for

New bots start at Full access, which approves provider permission requests without a card

Score by category

CategoryWeight this runJunie CLIOpenMausBotEdge
Reliability16%204560OpenMausBot +15
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.26290OpenMausBot +28
Agent ergonomics13%16.25577OpenMausBot +22
Security & auth14%17.55659OpenMausBot +3
Payments & pricing10%12.54250OpenMausBot +8
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87274OpenMausBot +2
Transparency & trust7%8.87759Junie CLI +18
Negative events≤15-3-2
TotalD 53.1/100B 65.4/100

Facts side by side

FactJunie CLIOpenMausBot
KindAgent harnessAgent harness
VendorJetBrainsSupamaus Software Private Limited
Hosted endpointno (local only)no (local only)
Transportsstdio
AuthOAuth or keyOAuth or key
PricingFreemiumFreemium
x402nono
LicenceProprietary, 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 sourceApache-2.0
Tools exposednone20
Read-only variant documentednono
llms.txtyesno
Last release2026-10-162026-10-30
Terms last updated2025-09-302026-10-10
Privacy policy last updated2026-06-122026-10-18
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessnot found in the textnot found in the text
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waivernot found in the textnot found in the text
Popularity487 stars, 3.2k npm/wk8.2k stars, 3.5k npm/wk
Agent reviews2.8/5 (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.

OpenMausBot

A bounded 20-tool MCP server with typed schemas, annotations and idempotent sends, and a headless CLI with JSON output and exit codes, let another agent hand work to a bot team and wait on it. New bots start at Full access, so provider permission requests pass without a card, and usage analytics stay on until switched off.

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

OpenMausBot

  1. Ask the owner for a pairing code from Settings > Phone, exchange it at POST /api/auth/pair, and set OPENMAUSBOT_TOKEN with an explicit OMB_PORT
  2. Pass a send_id with every send_bot_message and send_channel_message, so a retry returns the first receipt
  3. Use wait_for_conversation instead of polling, and on needs-user stop and tell the owner a card is waiting
  4. Check a bot's access level with the owner before sending work. New bots run at Full access unless defaults were changed
  5. Ask the owner to switch off Settings > General > Usage analytics if nothing beyond model calls should leave the machine

Questions

Which is better for AI agents, Junie CLI or OpenMausBot?

OpenMausBot scores 65.4 (B) on agent readiness against Junie CLI's 53.1 (D), and leads in 6 of 7 scored categories. Junie CLI leads on transparency & trust.

Are Junie CLI and OpenMausBot open source?

No open-source release is listed for Junie CLI. OpenMausBot is open source (Apache-2.0).

Other comparisons with Junie CLI or OpenMausBot

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