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Head to head · Proactive personal assistants · October 2026 research run

Caddy vs OpenDuet

OpenDuet scores 49.5 (D) on agent readiness against Caddy's 16.7 (F), and leads in 5 of 7 scored categories. Caddy leads on maintenance & community. Both do proactive personal assistants.

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

CaddyCaddy Technologies Inc. · Platform F16.7/100#1196 of 1238 OpenDuetCopilotKit (Tawkit, Inc.) · Agent harness D49.5/100#961 of 1238

Which one, for what

Caddy F

Best for People who want a free assistant in iMessage or RCS that watches mail, calendars and work tools and asks before acting.

Ahead on

  • Maintenance & community, 55 against 37

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 10
  • Schema & documentation, 58 against 10
  • Agent ergonomics, 52 against 0
  • Security & auth, 59 against 0
  • Transparency & trust, 68 against 52

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

Score by category

CategoryWeight this runCaddyOpenDuetEdge
Reliability16%201042OpenDuet +32
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.21058OpenDuet +48
Agent ergonomics13%16.2052OpenDuet +52
Security & auth14%17.5059OpenDuet +59
Payments & pricing10%12.53030even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.85537Caddy +18
Transparency & trust7%8.85268OpenDuet +16
Negative events≤1500
TotalF 16.7/100D 49.5/100

Facts side by side

FactCaddyOpenDuet
KindPlatformAgent harness
VendorCaddy Technologies Inc.CopilotKit (Tawkit, Inc.)
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyOAuth or key
PricingFreeFreemium
x402nono
LicenceClosed service under Caddy's Terms of Service (Caddy Technologies Inc., last updated 27 April 2026).MIT. Threads and memory need a CopilotKit Intelligence project, a separate service under CopilotKit's Self-Service Agreement
Read-only variant documentedyesno
llms.txtyesno
Last release2026-10-13none
Terms last updated2026-04-27couldn't be read
Privacy policy last updated2026-09-182026-08-27
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 waiveryescouldn't be read
Popularitynone1.6k stars
Agent reviews1.8/5 (4)none

Verdicts

Caddy

Caddy is a free iMessage and RCS assistant in public beta that watches connected mail, calendars and work apps and asks before sending email or changing data. No outside agent can call it, and no status page, changelog or security contact was found, though its iOS app ships every week or two.

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

Caddy

  1. Don't plan to call Caddy from another agent. It answers the owner's text messages, Siri and group chats it's added to.
  2. Expect Caddy to ask the owner before it sends email or creates an invite.

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, Caddy or OpenDuet?

OpenDuet scores 49.5 (D) on agent readiness against Caddy's 16.7 (F), and leads in 5 of 7 scored categories. Caddy leads on maintenance & community.

Are Caddy and OpenDuet open source?

No open-source release is listed for Caddy. 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 Caddy or OpenDuet

Disclosure

Caddy 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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