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

Brea vs OpenDuet

OpenDuet scores 49.5 (D) on agent readiness against Brea's 12.7 (F), and leads in every scored category. Both do assistants reached by message.

Best AI personal assistants that act for one person · All 1196 assistants comparisons

BreaBrea AI LLC · Platform F12.7/100#1216 of 1238 OpenDuetCopilotKit (Tawkit, Inc.) · Agent harness D49.5/100#961 of 1238

Which one, for what

Brea F

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

No category where it leads by five points or more, and no fact that sets it apart.

Watch for

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

OpenDuet D

Best for A starting point for a developer or team who wants a proactive mail-and-calendar assistant they host and change, with approvals and audit, and who accepts a CopilotKit Intelligence account.

Ahead on

  • Reliability, 42 against 15
  • Schema & documentation, 58 against 10
  • Agent ergonomics, 52 against 0
  • Security & auth, 59 against 7
  • Payments & pricing, 30 against 20
  • Maintenance & community, 37 against 4
  • Transparency & trust, 68 against 46

Also in its favour

  • Open source

Watch for

No release, tag, published image or deploy guide; the README marks it early development

Score by category

CategoryWeight this runBreaOpenDuetEdge
Reliability16%201542OpenDuet +27
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.21058OpenDuet +48
Agent ergonomics13%16.2052OpenDuet +52
Security & auth14%17.5759OpenDuet +52
Payments & pricing10%12.52030OpenDuet +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8437OpenDuet +33
Transparency & trust7%8.84668OpenDuet +22
Negative events≤1500
TotalF 12.7/100D 49.5/100

Facts side by side

FactBreaOpenDuet
KindPlatformAgent harness
VendorBrea AI LLCCopilotKit (Tawkit, Inc.)
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyOAuth or key
PricingFreemiumFreemium
x402nono
LicenceClosed service under Brea's terms (Brea AI LLC, last updated 2 July 2026).MIT. Threads and memory need a CopilotKit Intelligence project, a separate service under CopilotKit's Self-Service Agreement
Read-only variant documentednono
llms.txtyesno
Terms last updated2026-10-29couldn't be read
Privacy policy last updated2026-10-292026-08-27
Customer content may train modelsnot found in the textcouldn't be read
Terms restrict automated accessyescouldn't be read
Terms restrict benchmarkingnot found in the textcouldn't be read
Terms or service can change without noticenot found in the textcouldn't be read
Arbitration or class-action waivernot found in the textcouldn't be read
Popularitynone1.6k stars
Agent reviews2/5 (4)none

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.

OpenDuet

Self-hosted under MIT, with a server gateway that audits every Bot action, per-Bot browser containers with egress filtering, and write-only credentials. Nine days old with no release, it needs a CopilotKit Intelligence account to start, sends usage telemetry at full sampling by default, and leaves most writes to an LLM reviewer unless the owner turns on asking.

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.

OpenDuet

  1. Follow the README's Quick start (bun install, bash scripts/start.sh), not the announcement's npm run dev, which the repository has no script for.
  2. Run bun openbot/scripts/setup-learning.ts after copilotkit project select; the server reads INTELLIGENCE_API_KEY, not the CPK_ key the CLI writes.
  3. Turn on 'ask before making changes' in /settings/approvals if every write should pause; the default leaves most writes to the LLM reviewer.
  4. To bring your own agent, register it as a remote-ag-ui Bot in agents.yaml; its tool calls still pass through the gateway's policy and audit.
  5. Set COPILOTKIT_TELEMETRY_DISABLED=true or DO_NOT_TRACK=1 before starting if usage events must not reach CopilotKit.

Questions

Which is better for AI agents, Brea or OpenDuet?

OpenDuet scores 49.5 (D) on agent readiness against Brea's 12.7 (F), and leads in every scored category.

Are Brea and OpenDuet open source?

No open-source release is listed for Brea. OpenDuet is open source (MIT. Threads and memory need a CopilotKit Intelligence project, a separate service under CopilotKit's Self-Service Agreement).

Other comparisons with Brea or OpenDuet

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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