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

DeepTutor vs Gemini Spark

DeepTutor scores 62.7 (B) on agent readiness against Gemini Spark's 24.9 (F), and leads in 5 of 7 scored categories. Gemini Spark leads on security & auth. Both do assistants that remember you.

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

DeepTutorHKUDS · Agent harness B62.7/100#494 of 1238 Gemini SparkGoogle LLC · Platform F24.9/100#1171 of 1238

Which one, for what

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 14
  • Schema & documentation, 71 against 17
  • Agent ergonomics, 63 against 9
  • Payments & pricing, 60 against 10
  • Maintenance & community, 84 against 17

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

Gemini Spark F

Best for A person who already keeps mail, calendar and files in a personal Google Account and accepts Keep Activity being on.

Ahead on

  • Security & auth, 60 against 51

Also in its favour

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

Watch for

No public API, SDK or MCP server for an outside agent was found. Spark is reached in the Gemini mobile app, the Mac app and gemini.google.com

Score by category

CategoryWeight this runDeepTutorGemini SparkEdge
Reliability16%207814DeepTutor +64
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27117DeepTutor +54
Agent ergonomics13%16.2639DeepTutor +54
Security & auth14%17.55160Gemini Spark +9
Payments & pricing10%12.56010DeepTutor +50
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88417DeepTutor +67
Transparency & trust7%8.85253Gemini Spark +1
Negative events≤15-30
TotalB 62.7/100F 24.9/100

Facts side by side

FactDeepTutorGemini Spark
KindAgent harnessPlatform
VendorHKUDSGoogle LLC
Hosted endpointno (local only)no (local only)
Transports
AuthNoneOAuth
PricingFreePaid
x402nono
LicenceApache-2.0Proprietary hosted service under the Google Terms of Service
Read-only variant documentednono
llms.txtnono
Last release2026-10-282026-05-19
Terms last updatedno document linked2026-07-30
Privacy policy last updatedno document linked2026-09-24
Customer content may train modelsyes, with an opt-out
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 waivernot found in the text
Popularity51k starsnone
Agent reviewsnone1.8/5 (4)

Verdicts

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.

Gemini Spark

Google's help pages state what Spark confirms before doing, how to delete its remote browser and code data, and the risks of prompt injection. Spark has no public API, Google calls it experimental, and it runs only with Keep Activity on, the setting under which chats are used for model training and human review.

Before you call either

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

Gemini Spark

  1. Do not plan an integration against Spark. No public API or MCP server was found, and a person must hold a Google AI Pro or Ultra subscription
  2. Expect a confirmation request before sends, edits, purchases and web form submissions, and note that bulk changes to private Google Tasks run without one
  3. Delete remote browser data and remote code execution data in Gemini Spark Settings after a sensitive session. Deleting a task thread or Gemini Apps activity does not remove them
  4. Keep within 15 running tasks and 50 active schedules. A schedule does not run when 15 tasks are running or the usage limit is reached
  5. Treat every safety statement here as Google's own description. None was tested, and no message was sent to the service

Questions

Which is better for AI agents, DeepTutor or Gemini Spark?

DeepTutor scores 62.7 (B) on agent readiness against Gemini Spark's 24.9 (F), and leads in 5 of 7 scored categories. Gemini Spark leads on security & auth.

Are DeepTutor and Gemini Spark open source?

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

Other comparisons with DeepTutor or Gemini Spark

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