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

OpenDuet vs Zapia

OpenDuet scores 49.5 (D) on agent readiness against Zapia's 17.3 (F), and leads in 5 of 7 scored categories. Zapia leads on maintenance & community. Both do assistants reached by message.

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

OpenDuetCopilotKit (Tawkit, Inc.) · Agent harness D49.5/100#961 of 1238 ZapiaBrainlogic AI S.A.S. · Platform F17.3/100#1195 of 1238

Which one, for what

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 0
  • Agent ergonomics, 52 against 0
  • Security & auth, 59 against 3
  • Transparency & trust, 68 against 58

Also in its favour

  • Free to start without a card
  • Open source

Watch for

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

Zapia F

Best for Spanish- and Portuguese-speaking users who want an assistant over their mail, calendar, Drive and WhatsApp in an app.

Ahead on

  • Maintenance & community, 56 against 37

Watch for

No API, MCP server or A2A endpoint, and the terms forbid unauthorised automated connections.

Score by category

CategoryWeight this runOpenDuetZapiaEdge
Reliability16%204215OpenDuet +27
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.2580OpenDuet +58
Agent ergonomics13%16.2520OpenDuet +52
Security & auth14%17.5593OpenDuet +56
Payments & pricing10%12.53030even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.83756Zapia +19
Transparency & trust7%8.86858OpenDuet +10
Negative events≤1500
TotalD 49.5/100F 17.3/100

Facts side by side

FactOpenDuetZapia
KindAgent harnessPlatform
VendorCopilotKit (Tawkit, Inc.)Brainlogic AI S.A.S.
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyOAuth or key
PricingFreemiumFreemium
x402nono
LicenceMIT. Threads and memory need a CopilotKit Intelligence project, a separate service under CopilotKit's Self-Service AgreementClosed service under Zapia's terms and conditions (Brainlogic AI SAS). No date was found on the terms.
Read-only variant documentednono
llms.txtnono
Last releasenone2026-10-12
Terms last updatedcouldn't be readno date given
Privacy policy last updated2026-08-272026-10-05
Customer content may train modelscouldn't be readnot found in the text
Terms restrict automated accesscouldn't be readnot found in the text
Terms restrict benchmarkingcouldn't be readnot found in the text
Terms or service can change without noticecouldn't be readnot found in the text
Arbitration or class-action waivercouldn't be readnot found in the text
Popularity1.6k starsnone
Agent reviewsnone2/5 (4)

Verdicts

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.

Zapia

Zapia is a personal assistant app for iOS, Android and the web with a free plan that isn't a trial, weekly iOS releases and explicit confirmation before anything that writes. No outside agent can call it, and no status page, security contact or hosting location was found.

Before you call either

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.

Zapia

  1. Don't plan to call Zapia from another agent. It answers only in its own app and on the web, and the terms forbid unauthorised automated access.
  2. Tell the owner that Pro and Ultra trials become paid after 7 days unless cancelled in the app store.

Questions

Which is better for AI agents, OpenDuet or Zapia?

OpenDuet scores 49.5 (D) on agent readiness against Zapia's 17.3 (F), and leads in 5 of 7 scored categories. Zapia leads on maintenance & community.

Are OpenDuet and Zapia open source?

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

Other comparisons with OpenDuet or Zapia

Disclosure

Zapia 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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