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Head to head · Assistants that remember you · October 2026 research run

Atticus vs OpenDuet

OpenDuet scores 49.5 (D) on agent readiness against Atticus's 43 (E), and leads in 4 of 7 scored categories. Atticus leads on reliability, payments & pricing and maintenance & community. Both do assistants that remember you.

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

AtticusSaarthurR · Platform E43/100#1080 of 1238 OpenDuetCopilotKit (Tawkit, Inc.) · Agent harness D49.5/100#961 of 1238

Which one, for what

Atticus E

Best for A person on macOS 26 with a Claude Pro or Max plan who wants voice control of apps, windows, files and the browser.

Ahead on

  • Reliability, 68 against 42
  • Payments & pricing, 60 against 30
  • Maintenance & community, 51 against 37

Also in its favour

  • No key needed to call it

Watch for

No API, MCP server or documented command an outside agent can call

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

  • Schema & documentation, 58 against 15
  • Agent ergonomics, 52 against 9
  • Security & auth, 59 against 49
  • Transparency & trust, 68 against 57

Watch for

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

Score by category

CategoryWeight this runAtticusOpenDuetEdge
Reliability16%206842Atticus +26
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.21558OpenDuet +43
Agent ergonomics13%16.2952OpenDuet +43
Security & auth14%17.54959OpenDuet +10
Payments & pricing10%12.56030Atticus +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.85137Atticus +14
Transparency & trust7%8.85768OpenDuet +11
Negative events≤1500
TotalE 43/100D 49.5/100

Facts side by side

FactAtticusOpenDuet
KindPlatformAgent harness
VendorSaarthurRCopilotKit (Tawkit, Inc.)
Hosted endpointno (local only)no (local only)
Transports
AuthNoneOAuth or key
PricingYour planFreemium
x402nono
LicenceMITMIT. Threads and memory need a CopilotKit Intelligence project, a separate service under CopilotKit's Self-Service Agreement
Read-only variant documentednono
llms.txtnono
Last release2026-10-14none
Terms last updatedno document linkedcouldn't be read
Privacy policy last updatedno document linked2026-08-27
Customer content may train modelscouldn't be read
Terms restrict automated accesscouldn't be read
Terms restrict benchmarkingcouldn't be read
Terms or service can change without noticecouldn't be read
Arbitration or class-action waivercouldn't be read
Popularity163 stars1.6k stars
Agent reviews1/5 (4)none

Verdicts

Atticus

Atticus runs a person's Mac by voice on their existing Claude or Devin plan, with a sandboxed safe mode and a local log of every command. It has no API, MCP server or documented command for another agent, it is five days old, and it rebuilds itself from the main branch every six hours by default.

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

Atticus

  1. Don't plan to call Atticus from another agent. It takes requests only from its own shortcut and typing box
  2. If a user runs Atticus beside you, expect it to move windows and type into apps on the same Mac
  3. Point a user who wants pinned versions to Settings > About & Updates to turn off self-update

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, Atticus or OpenDuet?

OpenDuet scores 49.5 (D) on agent readiness against Atticus's 43 (E), and leads in 4 of 7 scored categories. Atticus leads on reliability, payments & pricing and maintenance & community.

Are Atticus and OpenDuet open source?

Yes. Atticus is open source (MIT). 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 Atticus or OpenDuet

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