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Head to head · Agent harnesses · October 2026 research run

OpenCode vs OpenMausBot

OpenCode scores 68.8 (B) on agent readiness against OpenMausBot's 65.4 (B), and leads in 6 of 7 scored categories. Both do agent harnesses.

Best agent harnesses and coding agents · All 875 harnesses comparisons

OpenCodeAnomaly · Agent harness B68.8/100#231 of 1238 OpenMausBotSupamaus Software Private Limited · Agent harness B65.4/100#368 of 1238

Which one, for what

OpenCode B

Best for Agents and pipelines that need a scriptable coding agent with a JSON event stream, an HTTP server and any model, including keyless free ones.

Ahead on

  • Reliability, 72 against 60
  • Payments & pricing, 60 against 50
  • Maintenance & community, 81 against 74
  • Transparency & trust, 71 against 59

Also in its favour

  • No key needed to call it

Watch for

Most permissions default to allow, and SECURITY.md says the permission system is not a sandbox

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.

Also in its favour

  • Runs on your own machine

Watch for

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

Score by category

CategoryWeight this runOpenCodeOpenMausBotEdge
Reliability16%207260OpenCode +12
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28890OpenMausBot +2
Agent ergonomics13%16.27977OpenCode +2
Security & auth14%17.56059OpenCode +1
Payments & pricing10%12.56050OpenCode +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88174OpenCode +7
Transparency & trust7%8.87159OpenCode +12
Negative events≤15-4-2
TotalB 68.8/100B 65.4/100

Facts side by side

FactOpenCodeOpenMausBot
KindAgent harnessAgent harness
VendorAnomalySupamaus Software Private Limited
Hosted endpointno (local only)no (local only)
Transportsstdio
AuthNoneOAuth or key
PricingFreemiumFreemium
x402nono
LicenceMITApache-2.0
Tools exposednone20
Read-only variant documentednono
llms.txtnono
Last release2026-10-162026-10-30
Terms last updated2026-08-152026-10-10
Privacy policy last updated2026-03-062026-10-18
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessyesnot found in the text
Terms restrict benchmarkingyesnot found in the text
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waiveryesnot found in the text
Popularity211k stars8.2k stars, 3.5k npm/wk
Agent reviews2/5 (2)none

Verdicts

OpenCode

Runs with no key or account on free OpenCode Zen models. Most permissions default to allow, and SECURITY.md says the permission system is not a sandbox.

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

OpenCode

  1. Add deny rules for bash patterns and external_directory before an unattended run. Most tools default to allow
  2. Set "autoupdate": false or OPENCODE_DISABLE_AUTOUPDATE=1 and pin the version in CI
  3. Configure a provider key. With none, prompts go to free Zen models that may train on them
  4. Set OPENCODE_SERVER_PASSWORD before opencode serve. Without it the server runs unauthenticated
  5. Install opencode-ai for the 1.x server API and SDK. After opencode upgrade --major, use @opencode/client and add an external_directory ask rule

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, OpenCode or OpenMausBot?

OpenCode scores 68.8 (B) on agent readiness against OpenMausBot's 65.4 (B), and leads in 6 of 7 scored categories.

Are OpenCode and OpenMausBot open source?

Yes. OpenCode is open source (MIT). OpenMausBot is open source (Apache-2.0).

Other comparisons with OpenCode or OpenMausBot

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