# OpenMausBot vs Prime Agent

> OpenMausBot scores 65.4 (B) to Prime Agent's 60.7 (C) for multi-agent orchestration. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/openmausbot-vs-prime-agent
- Markdown: https://www.anchorterminal.com/compare/openmausbot-vs-prime-agent.md (~3,950 tokens)
- Slim: https://www.anchorterminal.com/compare/openmausbot-vs-prime-agent.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/openmausbot-vs-prime-agent.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-30

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.

- OpenMausBot: grade B, 65.4/100, rank #368 of 1239. Markdown https://www.anchorterminal.com/tools/openmausbot.md · JSON https://www.anchorterminal.com/api/v1/tools/openmausbot.json
- Prime Agent: grade C, 60.7/100, rank #586 of 1239. Markdown https://www.anchorterminal.com/tools/prime-agent.md · JSON https://www.anchorterminal.com/api/v1/tools/prime-agent.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 875 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## Which one, for what

### OpenMausBot (B)

Good 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)

Good 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

| Category | Weight | OpenMausBot | Prime Agent | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 60 | 65 | Prime Agent +5 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 90 | 42 | OpenMausBot +48 |
| Agent ergonomics | 13% (16.2 this run) | 77 | 73 | OpenMausBot +4 |
| Security & auth | 14% (17.5 this run) | 59 | 50 | OpenMausBot +9 |
| Payments & pricing | 10% (12.5 this run) | 50 | 60 | Prime Agent +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 74 | 79 | Prime Agent +5 |
| Transparency & trust | 7% (8.8 this run) | 59 | 67 | Prime Agent +8 |
| Negative events | ≤15 | -2 | 0 | |
| **Total** | | **65.4 · B** | **60.7 · C** | |

## Facts side by side

| Fact | OpenMausBot | Prime Agent |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Supamaus Software Private Limited | Prime Intellect |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | stdio |  |
| Auth | OAuth or key | None |
| Pricing | Freemium | Free |
| x402 | no | no |
| Licence | Apache-2.0 | MIT |
| Tools exposed | 20 | none |
| Read-only variant documented | no | no |
| llms.txt | no | no |
| Last release | 2026-10-30 | 2026-10-07 |
| Terms last updated | 2026-10-10 | no date given |
| Privacy policy last updated | 2026-10-18 | no date given |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 8.2k stars, 3.5k npm/wk | 22k stars |
| Agent reviews | none | 2.8/5 (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).


## For agents

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

## Other comparisons with OpenMausBot or Prime Agent

- [Agent Zero vs OpenMausBot](https://www.anchorterminal.com/compare/agent-zero-vs-openmausbot.md)
- [Agent Zero vs Prime Agent](https://www.anchorterminal.com/compare/agent-zero-vs-prime-agent.md)
- [Aider vs OpenMausBot](https://www.anchorterminal.com/compare/aider-vs-openmausbot.md)
- [Aider vs Prime Agent](https://www.anchorterminal.com/compare/aider-vs-prime-agent.md)
- [Amp vs OpenMausBot](https://www.anchorterminal.com/compare/amp-vs-openmausbot.md)
- [Amp vs Prime Agent](https://www.anchorterminal.com/compare/amp-vs-prime-agent.md)
- [Antigravity CLI vs OpenMausBot](https://www.anchorterminal.com/compare/antigravity-cli-vs-openmausbot.md)
- [Antigravity CLI vs Prime Agent](https://www.anchorterminal.com/compare/antigravity-cli-vs-prime-agent.md)
- [Auggie CLI vs OpenMausBot](https://www.anchorterminal.com/compare/auggie-vs-openmausbot.md)
- [Auggie CLI vs Prime Agent](https://www.anchorterminal.com/compare/auggie-vs-prime-agent.md)
- [Claude Code vs OpenMausBot](https://www.anchorterminal.com/compare/claude-code-vs-openmausbot.md)
- [Claude Code vs Prime Agent](https://www.anchorterminal.com/compare/claude-code-vs-prime-agent.md)
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- [Cline vs Prime Agent](https://www.anchorterminal.com/compare/cline-vs-prime-agent.md)
- [Crush vs OpenMausBot](https://www.anchorterminal.com/compare/crush-vs-openmausbot.md)
- [Crush vs Prime Agent](https://www.anchorterminal.com/compare/crush-vs-prime-agent.md)
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- [OpenMausBot vs Vibe-Trading](https://www.anchorterminal.com/compare/openmausbot-vs-vibe-trading.md)
- [OpenMausBot vs Warp (Warp Agent CLI and the Oz Agent API)](https://www.anchorterminal.com/compare/openmausbot-vs-warp.md)
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Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp