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

Gemini Spark vs LearnHarness

LearnHarness scores 59.3 (C) on agent readiness against Gemini Spark's 24.9 (F), and leads in 6 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

Gemini SparkGoogle LLC · Platform F24.9/100#1171 of 1238 LearnHarnessAmos Blomqvist · Agent harness C59.3/100#647 of 1238

Which one, for what

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 52

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

LearnHarness C

Best for A tutor for one learner that keeps a local record of sessions and a graph of propositions and reasoning chains.

Ahead on

  • Reliability, 56 against 14
  • Schema & documentation, 63 against 17
  • Agent ergonomics, 60 against 9
  • Payments & pricing, 60 against 10
  • Maintenance & community, 71 against 17
  • Transparency & trust, 60 against 53

Also in its favour

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

Watch for

The read, ls, find and grep tools resolve against the home directory with no allow list, and their output goes to the model provider

Score by category

CategoryWeight this runGemini SparkLearnHarnessEdge
Reliability16%201456LearnHarness +42
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.21763LearnHarness +46
Agent ergonomics13%16.2960LearnHarness +51
Security & auth14%17.56052Gemini Spark +8
Payments & pricing10%12.51060LearnHarness +50
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.81771LearnHarness +54
Transparency & trust7%8.85360LearnHarness +7
Negative events≤1500
TotalF 24.9/100C 59.3/100

Facts side by side

FactGemini SparkLearnHarness
KindPlatformAgent harness
VendorGoogle LLCAmos Blomqvist
Hosted endpointno (local only)no (local only)
Transports
AuthOAuthNone
PricingPaidFree
x402nono
LicenceProprietary hosted service under the Google Terms of ServiceAGPL-3.0-only
Read-only variant documentednono
llms.txtnono
Last release2026-05-192026-10-29
Terms last updated2026-07-30no date given
Privacy policy last updated2026-09-24no document linked
Customer content may train modelsyes, with an opt-outnot found in the text
Terms restrict automated accessyesnot found in the text
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waivernot found in the textnot found in the text
Popularitynone4.2k stars
Agent reviews1.8/5 (4)none

Verdicts

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.

LearnHarness

The in-app agent reads files but cannot change them or run commands, and a bundled skill gives other agents a documented read-only view of sessions and the knowledge graph. The project is 14 days old at 0.4.0, its file reads reach the whole home directory without approval, and it has no security policy.

Before you call either

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

LearnHarness

  1. Use the bundled skill (skills/learnharness/SKILL.md) to read a learner's record. It needs Python 3.10 or later and writes nothing
  2. Pass --format json before the subcommand, for example python3 -B scripts/graph.py --format json propositions
  3. Treat stored answer keys and teacher prose as model-authored. A proposition in the graph is not evidence the learner understood it
  4. Do not read auth.json, which sits one folder above the data folder and holds provider keys in plain text
  5. Close the app or re-read when a stable snapshot matters. The readers do not lock files while the app writes

Questions

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

LearnHarness scores 59.3 (C) on agent readiness against Gemini Spark's 24.9 (F), and leads in 6 of 7 scored categories. Gemini Spark leads on security & auth.

Are Gemini Spark and LearnHarness open source?

No open-source release is listed for Gemini Spark. LearnHarness is open source (AGPL-3.0-only).

Other comparisons with Gemini Spark or LearnHarness

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