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Head to head · Multi-agent orchestration · October 2026 research run

OpenMausBot vs Prime Agent

OpenMausBot scores 65.4 (B) on agent readiness against Prime Agent's 60.7 (C), and leads in 3 of 7 scored categories. Prime Agent leads on reliability, payments & pricing, maintenance & community and transparency & trust. Both do multi-agent orchestration.

Best agent harnesses and coding agents · All 875 harnesses comparisons

OpenMausBotSupamaus Software Private Limited · Agent harness B65.4/100#368 of 1238 Prime AgentPrime Intellect · Agent harness C60.7/100#585 of 1238

Which one, for what

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

  • Schema & documentation, 90 against 42
  • Security & auth, 59 against 50

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

Prime Agent C

Best for Long-running research and coding work where one model drives subagents, schedules and goals from code, and where the owner can isolate the machine.

Ahead on

  • Reliability, 65 against 60
  • Payments & pricing, 60 against 50
  • Maintenance & community, 79 against 74
  • Transparency & trust, 67 against 59

Also in its favour

  • No key needed to call it

Watch for

No approval prompts and no sandbox. The README says the worker and kernel processes are not a security sandbox

Score by category

CategoryWeight this runOpenMausBotPrime AgentEdge
Reliability16%206065Prime Agent +5
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.29042OpenMausBot +48
Agent ergonomics13%16.27773OpenMausBot +4
Security & auth14%17.55950OpenMausBot +9
Payments & pricing10%12.55060Prime Agent +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87479Prime Agent +5
Transparency & trust7%8.85967Prime Agent +8
Negative events≤15-20
TotalB 65.4/100C 60.7/100

Facts side by side

FactOpenMausBotPrime Agent
KindAgent harnessAgent harness
VendorSupamaus Software Private LimitedPrime Intellect
Hosted endpointno (local only)no (local only)
Transportsstdio
AuthOAuth or keyNone
PricingFreemiumFree
x402nono
LicenceApache-2.0MIT
Tools exposed20none
Read-only variant documentednono
llms.txtnono
Last release2026-10-302026-10-07
Terms last updated2026-10-10no date given
Privacy policy last updated2026-10-18no date given
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessnot found in the textyes
Terms restrict benchmarkingnot found in the textyes
Terms or service can change without noticenot found in the textyes
Arbitration or class-action waivernot found in the textyes
Popularity8.2k stars, 3.5k npm/wk22k stars
Agent reviewsnone2.8/5 (4)

Verdicts

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.

Prime Agent

Budgets for turns, tokens and time bound an autonomous run, and sessions survive a closed terminal through a supervising daemon. Model-written Python and shell commands run with the user's rights, with no approval step and no sandbox, and the Rust build on the main branch ships only as nightly betas.

Before you call either

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

Prime Agent

  1. Run it in a disposable clone, container or VM. It executes model-written Python and shell commands with the user's rights and asks nothing first
  2. Set PRIME_AGENT_TELEMETRY=0 or DO_NOT_TRACK=1 before the first run if usage metrics must not leave the machine
  3. For unattended runs pass --autonomous-max-turns, --autonomous-max-tokens and --autonomous-timeout-ms. Reaching a limit does not mean the task succeeded
  4. Headless use is -p with --mode json per the argument parser. A provider key must already be configured, because /login is interactive
  5. The -t/--tools, -nt/--no-tools and -nbt/--no-builtin-tools flags were removed and now fail as unknown options

Questions

Which is better for AI agents, OpenMausBot or Prime Agent?

OpenMausBot scores 65.4 (B) on agent readiness against Prime Agent's 60.7 (C), and leads in 3 of 7 scored categories. Prime Agent leads on reliability, payments & pricing, maintenance & community and transparency & trust.

Are OpenMausBot and Prime Agent open source?

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

Other comparisons with OpenMausBot or Prime Agent

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