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Head to head · Assistants reached by message · October 2026 research run

Brea vs CowAgent

CowAgent scores 58.5 (C) on agent readiness against Brea's 12.9 (F), and leads in 6 of 7 scored categories. Both do assistants reached by message.

Best AI personal assistants that act for one person · All 834 assistants comparisons

BreaBrea AI LLC · Platform F12.9/100#1001 of 1010 CowAgentzhayujie · Agent harness C58.5/100#592 of 1010

Which one, for what

Brea F

Best for An iPhone user who wants an assistant across many apps and websites with per-action approval.

Also in its favour

  • No incidents deducted, where CowAgent loses 5 points for them

Watch for

No API, MCP server or A2A endpoint for an outside agent.

CowAgent C

Best for One technical owner who wants an assistant on WeChat, Feishu, DingTalk, Telegram, Slack or Discord with memory in local files and a choice of Chinese and Western model providers.

Ahead on

  • Reliability, 84 against 15
  • Schema & documentation, 67 against 10
  • Agent ergonomics, 59 against 0
  • Security & auth, 43 against 7
  • Payments & pricing, 60 against 20
  • Maintenance & community, 83 against 4

Also in its favour

  • Open source

Watch for

Source and Docker installs default to full-access, and no mode asks the owner before a shell command, a file send or an MCP call

Score by category

CategoryWeight this runBreaCowAgentEdge
Reliability16%201584CowAgent +69
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.21067CowAgent +57
Agent ergonomics13%16.2059CowAgent +59
Security & auth14%17.5743CowAgent +36
Payments & pricing10%12.52060CowAgent +40
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8483CowAgent +79
Transparency & trust7%8.84845Brea +3
Negative events≤150-5
TotalF 12.9/100C 58.5/100

Facts side by side

FactBreaCowAgent
KindPlatformAgent harness
VendorBrea AI LLCzhayujie
Hosted endpointno (local only)no (local only)
TransportsHTTP
AuthOAuth or keyOAuth or key
PricingFreemiumFree
x402nono
LicenceClosed service under Brea's terms (Brea AI LLC, last updated 2 July 2026).MIT
Read-only variant documentednoyes
llms.txtyesyes
Last releasenone2026-09-30
Terms last updatedno document linked
Privacy policy last updatedno document linked
Customer content may train models
Terms restrict automated access
Terms restrict benchmarking
Terms or service can change without notice
Arbitration or class-action waiver
Popularitynone47k stars

Verdicts

Brea

Brea is an iMessage assistant with a free plan that needs no card, approval by reply before it sends, deletes or pays, and one-time Link cards for purchases. No outside agent can call it, paid prices sit inside the app, and no changelog or subprocessor list was found.

CowAgent

MIT software with seven releases in 90 days, memory kept as plain files in the owner's workspace and three per-session permission modes. Source and Docker installs default to full-access, no action asks for approval, and an open report of 31 July 2026 says group members could reach the owner's files through the bot.

Before you call either

Brea

  1. Don't plan to call Brea from another agent. It answers only the owner's iMessage thread.
  2. Tell the owner that replying ALWAYS stops Brea asking again for that action.

CowAgent

  1. Set agent_permission_mode to workspace-write or read-only before connecting any channel. Source and Docker installs default to full-access
  2. Keep the bot out of group chats that include other people. Any member who mentions it reaches the same tools as the owner
  3. Set web_password before changing web_host to 0.0.0.0. The password is empty by default
  4. Set external_api_token to enable POST /v1/chat/completions, and send conversation_id to keep one session. The model field does not select a model
  5. Run it in a container for a hard boundary. The docs and the source both say the permission modes are not isolation

Questions

Which is better for AI agents, Brea or CowAgent?

CowAgent scores 58.5 (C) on agent readiness against Brea's 12.9 (F), and leads in 6 of 7 scored categories.

Are Brea and CowAgent open source?

No open-source release is listed for Brea. CowAgent is open source (MIT).

Other comparisons with Brea or CowAgent

Disclosure

Brea competes with LocalGhost, which Anchor Terminal's founder builds. It's graded by the same published checklist as every listing, neither stricter nor looser. Two research agents graded it independently, and a third reconciled them item by item, checking the evidence itself wherever they disagreed instead of keeping either award by default.

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