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

OpenDuet vs Tab

OpenDuet scores 49.5 (D) on agent readiness against Tab's 10.6 (F), and leads in 6 of 7 scored categories. Tab 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 TabTerrasoft, Inc. · Platform F10.6/100#1223 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 5
  • Schema & documentation, 58 against 0
  • Agent ergonomics, 52 against 0
  • Security & auth, 59 against 4
  • Payments & pricing, 30 against 0
  • Transparency & trust, 68 against 44

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

Tab F

Best for A person who wants a texting assistant that browses, calls and buys with tight checkout controls.

Ahead on

  • Maintenance & community, 58 against 37

Watch for

Private beta behind a waitlist.

Score by category

CategoryWeight this runOpenDuetTabEdge
Reliability16%20425OpenDuet +37
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.2580OpenDuet +58
Agent ergonomics13%16.2520OpenDuet +52
Security & auth14%17.5594OpenDuet +55
Payments & pricing10%12.5300OpenDuet +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.83758Tab +21
Transparency & trust7%8.86844OpenDuet +24
Negative events≤1500
TotalD 49.5/100F 10.6/100

Facts side by side

FactOpenDuetTab
KindAgent harnessPlatform
VendorCopilotKit (Tawkit, Inc.)Terrasoft, Inc.
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyOAuth or key
PricingFreemiumPaid
x402nono
LicenceMIT. Threads and memory need a CopilotKit Intelligence project, a separate service under CopilotKit's Self-Service AgreementClosed service under Tab's Terms of Use (Terrasoft, Inc., effective 2 September 2026).
Read-only variant documentednono
llms.txtnono
Terms last updatedcouldn't be read2026-09-02
Privacy policy last updated2026-08-272026-09-02
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 reviewsnone1.8/5 (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.

Tab

Tab is a private-beta texting assistant with a detailed security page on credential isolation and checkout binding, and a public updates page. No outside agent can call it, no price is published, and its privacy policy says nothing on training with user content.

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.

Tab

  1. Don't plan to call Tab from another agent. It answers only the owner's Messages or WhatsApp thread.
  2. Tell the owner that access needs a waitlist place and no price is published.

Questions

Which is better for AI agents, OpenDuet or Tab?

OpenDuet scores 49.5 (D) on agent readiness against Tab's 10.6 (F), and leads in 6 of 7 scored categories. Tab leads on maintenance & community.

Are OpenDuet and Tab 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 Tab.

Other comparisons with OpenDuet or Tab

Disclosure

Tab 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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