# Devin vs OpenMausBot

> OpenMausBot scores 65.4 (B) to Devin's 55.8 (C) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/devin-vs-openmausbot
- Markdown: https://www.anchorterminal.com/compare/devin-vs-openmausbot.md (~3,800 tokens)
- Slim: https://www.anchorterminal.com/compare/devin-vs-openmausbot.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/devin-vs-openmausbot.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 Devin's 55.8 (C), and leads in 5 of 7 scored categories. Devin leads on security & auth and transparency & trust. Both do agent harnesses.

- Devin: grade C, 55.8/100, rank #774 of 1239. Markdown https://www.anchorterminal.com/tools/devin.md · JSON https://www.anchorterminal.com/api/v1/tools/devin.json
- 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
- 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

### Devin (C)

Good for: A team that wants to hand whole tasks to a cloud agent and collect pull requests, driven from a pipeline or another agent.

Ahead on:
- Security & auth, 72 against 59
- Transparency & trust, 70 against 59

Also in its favour:
- A hosted endpoint, with nothing to install

Watch for: www.devinstatus.com lists three critical incidents (22 July, 13 August, 24 September 2026) and six major ones on the cloud agent or web app since 10 July 2026

### 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:
- Reliability, 60 against 30
- Schema & documentation, 90 against 80
- Agent ergonomics, 77 against 62
- Payments & pricing, 50 against 20
- Maintenance & community, 74 against 63

Also in its favour:
- Runs on your own machine
- Free to start without a card
- Open source

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


## Score by category

| Category | Weight | Devin | OpenMausBot | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 30 | 60 | OpenMausBot +30 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 80 | 90 | OpenMausBot +10 |
| Agent ergonomics | 13% (16.2 this run) | 62 | 77 | OpenMausBot +15 |
| Security & auth | 14% (17.5 this run) | 72 | 59 | Devin +13 |
| Payments & pricing | 10% (12.5 this run) | 20 | 50 | OpenMausBot +30 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 63 | 74 | OpenMausBot +11 |
| Transparency & trust | 7% (8.8 this run) | 70 | 59 | Devin +11 |
| Negative events | ≤15 | 0 | -2 | |
| **Total** | | **55.8 · C** | **65.4 · B** | |

## Facts side by side

| Fact | Devin | OpenMausBot |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Cognition AI, Inc. | Supamaus Software Private Limited |
| Hosted endpoint | `https://mcp.devin.ai/mcp` | no (local only) |
| Transports | HTTP | stdio |
| Auth | API key | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Proprietary service under Cognition's Platform Terms of Service | Apache-2.0 |
| Tools exposed | 13 | 20 |
| Read-only variant documented | yes | no |
| llms.txt | yes | no |
| Last release | 2026-10-07 | 2026-10-30 |
| Terms last updated | 2026-06-30 | 2026-10-10 |
| Privacy policy last updated | 2026-03-09 | 2026-10-18 |
| Customer content may train models | yes, with an opt-out | not found in the text |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | none | 8.2k stars, 3.5k npm/wk |

## Verdicts

**Devin.** The v3 API is well specified, with a public OpenAPI 3.1 file covering 239 operations, problem+json errors, cursor pagination and service-user keys tied to roles. The status page records three critical and several major incidents on the cloud agent between 22 July and 24 September 2026, and no rate limit figures or retry guidance were found in the reviewed documentation.

**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

### Devin

1. Use a `cog_` service-user key with the Member role. Legacy `apk_` keys fail against v3 and the MCP server with 401 or 403
2. Set `max_acu_limit` on every session you create. Usage is metered by the work done and has no published unit rate
3. Session creation is not idempotent in v3. After a timeout, list sessions by tag before creating again
4. Enterprise keys and personal access tokens must send `X-Org-Id` to the MCP server. Organisation-scoped keys resolve it automatically
5. Create scheduled work as an automation. POST to the schedules endpoint returns 403 for migrated organisations since 24 September 2026

### 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, Devin or OpenMausBot?

OpenMausBot scores 65.4 (B) on agent readiness against Devin's 55.8 (C), and leads in 5 of 7 scored categories. Devin leads on security & auth and transparency & trust.

### Are Devin and OpenMausBot open source?

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


## For agents

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

## Other comparisons with Devin or OpenMausBot

- [Agent Zero vs Devin](https://www.anchorterminal.com/compare/agent-zero-vs-devin.md)
- [Agent Zero vs OpenMausBot](https://www.anchorterminal.com/compare/agent-zero-vs-openmausbot.md)
- [Aider vs Devin](https://www.anchorterminal.com/compare/aider-vs-devin.md)
- [Aider vs OpenMausBot](https://www.anchorterminal.com/compare/aider-vs-openmausbot.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