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

Caddy vs DeepTutor

DeepTutor scores 62.7 (B) 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 1196 assistants comparisons

CaddyCaddy Technologies Inc. · Platform F16.7/100#1196 of 1238 DeepTutorHKUDS · Agent harness B62.7/100#494 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.

Also in its favour

  • No incidents deducted, where DeepTutor loses 3 points for them

Watch for

No API, MCP server or A2A endpoint for an outside agent.

DeepTutor B

Best for A learner, a teacher or a small group that wants a self-hosted tutor over their own documents, with quizzes, research reports, memory and IM companions, or for an agent that hands study tasks to it through the JSON CLI.

Ahead on

  • Reliability, 78 against 10
  • Schema & documentation, 71 against 10
  • Agent ergonomics, 63 against 0
  • Security & auth, 51 against 0
  • Payments & pricing, 60 against 30
  • Maintenance & community, 84 against 55

Also in its favour

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

Watch for

The default launch binds the backend to 0.0.0.0 with sign-in off and CORS open to any origin with credentials

Score by category

CategoryWeight this runCaddyDeepTutorEdge
Reliability16%201078DeepTutor +68
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.21071DeepTutor +61
Agent ergonomics13%16.2063DeepTutor +63
Security & auth14%17.5051DeepTutor +51
Payments & pricing10%12.53060DeepTutor +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.85584DeepTutor +29
Transparency & trust7%8.85252even
Negative events≤150-3
TotalF 16.7/100B 62.7/100

Facts side by side

FactCaddyDeepTutor
KindPlatformAgent harness
VendorCaddy Technologies Inc.HKUDS
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyNone
PricingFreeFree
x402nono
LicenceClosed service under Caddy's Terms of Service (Caddy Technologies Inc., last updated 27 April 2026).Apache-2.0
Read-only variant documentedyesno
llms.txtyesno
Last release2026-10-132026-10-28
Terms last updated2026-04-27no document linked
Privacy policy last updated2026-09-18no document linked
Customer content may train modelsnot found in the text
Terms restrict automated accessyes
Terms restrict benchmarkingnot found in the text
Terms or service can change without noticenot found in the text
Arbitration or class-action waiveryes
Popularitynone51k 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.

DeepTutor

DeepTutor runs on the owner's machine under Apache 2.0, ships releases every few days with upgrade notes, and gives other agents a JSON CLI with resumable sessions. Its default launch binds all interfaces with sign-in off and permissive CORS, there is no security policy, and two CVEs in 2026 covered a shell-tool RCE and a multi-user MCP bypass, both fixed.

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.

DeepTutor

  1. Run deeptutor run <capability> "..." --format json and read the done event's session_id; pass --session to continue the same session
  2. Configure with deeptutor config apply setup.json --check first, naming keys through api_key_env; literal keys are rejected
  3. Before exposing it beyond one machine, enable sign-in in auth.json, set exact cors_origins and set BACKEND_HOST=127.0.0.1 where loopback is wanted
  4. Run 1.4.10 or later. Earlier versions carry CVE-2026-51870 (shell tool RCE, fixed in 1.4.1) and CVE-2026-58168 (multi-user MCP bypass)
  5. Set sandbox_allow_subprocess to false where generated code must run only in the runner sidecar or bubblewrap

Questions

Which is better for AI agents, Caddy or DeepTutor?

DeepTutor scores 62.7 (B) on agent readiness against Caddy's 16.7 (F), and leads in 6 of 7 scored categories.

Are Caddy and DeepTutor open source?

No open-source release is listed for Caddy. DeepTutor is open source (Apache-2.0).

Other comparisons with Caddy or DeepTutor

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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