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

Atticus vs Caddy

Atticus scores 42.9 (E) on agent readiness against Caddy's 16.7 (F), and leads in 6 of 7 scored categories. Both do assistants that remember you.

Best AI personal assistants that act for one person · All 875 assistants comparisons

AtticusSaarthurR (Saarth Ranka) · Platform E42.9/100#974 of 1094 CaddyCaddy Technologies Inc. · Platform F16.7/100#1064 of 1094

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 10
  • Schema & documentation, 15 against 10
  • Agent ergonomics, 9 against 0
  • Security & auth, 49 against 0
  • Payments & pricing, 60 against 30

Also in its favour

  • No key needed to call it
  • Free to start without a card
  • Open source

Watch for

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

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.

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.

Score by category

CategoryWeight this runAtticusCaddyEdge
Reliability16%206810Atticus +58
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.21510Atticus +5
Agent ergonomics13%16.290Atticus +9
Security & auth14%17.5490Atticus +49
Payments & pricing10%12.56030Atticus +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.85155Caddy +4
Transparency & trust7%8.85652Atticus +4
Negative events≤1500
TotalE 42.9/100F 16.7/100

Facts side by side

FactAtticusCaddy
KindPlatformPlatform
VendorSaarthurR (Saarth Ranka)Caddy Technologies Inc.
Hosted endpointno (local only)no (local only)
Transports
AuthNoneOAuth or key
PricingYour planFree
x402nono
LicenceMITClosed service under Caddy's Terms of Service (Caddy Technologies Inc., last updated 27 April 2026).
Read-only variant documentednoyes
llms.txtnoyes
Last release2026-10-142026-10-13
Terms last updatedno document linked
Privacy policy last updatedno document linked
Customer content may train models
Terms restrict automated access
Terms restrict benchmarking
Terms or service can change without notice
Arbitration or class-action waiver
Popularity163 starsnone

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.

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.

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

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.

Questions

Which is better for AI agents, Atticus or Caddy?

Atticus scores 42.9 (E) on agent readiness against Caddy's 16.7 (F), and leads in 6 of 7 scored categories.

Are Atticus and Caddy open source?

Atticus is open source (MIT). No open-source release is listed for Caddy.

Other comparisons with Atticus or Caddy

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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