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Head to head · Assistant proactive · October 2026 research run

GAIA vs Gemini Spark

GAIA scores 49.5 (D) on agent readiness against Gemini Spark's 24.5 (F), and leads in 6 of 7 scored categories. Gemini Spark leads on security & auth. Both do assistant proactive.

Best AI personal assistants that act for one person · All 190 assistants comparisons

GAIAThe Experience Company · Platform D49.5/100#813 of 986 Gemini SparkGoogle LLC · Platform F24.5/100#974 of 986

Which one, for what

GAIA D

Best for It suits one person who wants mail triage, meeting briefs, todos and scheduled workflows from one assistant reachable on WhatsApp, Telegram, Slack, Discord or iMessage, and who wants to read the source.

Ahead on

  • Reliability, 67 against 14
  • Schema & documentation, 51 against 17
  • Agent ergonomics, 54 against 9
  • Payments & pricing, 20 against 10
  • Maintenance & community, 78 against 17
  • Transparency & trust, 60 against 49

Watch for

The default approval mode in the source is always_allow, commented as nothing gated, while the privacy policy and the 26 August release notes say destructive actions wait for approval.

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 54

Also in its favour

  • No incidents deducted, where GAIA loses 5 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 runGAIAGemini SparkEdge
Reliability16%206714GAIA +53
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.25117GAIA +34
Agent ergonomics13%16.2549GAIA +45
Security & auth14%17.55460Gemini Spark +6
Payments & pricing10%12.52010GAIA +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87817GAIA +61
Transparency & trust7%8.86049GAIA +11
Negative events≤15-50
TotalD 49.5/100F 24.5/100

Facts side by side

FactGAIAGemini Spark
KindPlatformPlatform
VendorThe Experience CompanyGoogle LLC
Hosted endpointno (local only)no (local only)
Transports
AuthOAuthOAuth
PricingPaidPaid
x402nono
LicencePolyForm-Noncommercial-1.0.0Proprietary hosted service under the Google Terms of Service
Read-only variant documentednono
llms.txtyesno
Last release2026-09-142026-05-19
Terms last updated2026-08-142026-07-30
Privacy policy last updated2026-08-072026-09-24
Customer content may train modelsnot found in the textyes, with an opt-out
Terms restrict automated accessyesyes
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticeyesnot found in the text
Arbitration or class-action waiveryesnot found in the text
Popularity308 starsnone

Verdicts

GAIA

GAIA's source is public, so its approval gate, memory store and token handling can be read. Three approval modes and per-tool overrides exist, but the default mode in the source runs every action unasked, which the privacy policy and release notes do not say. Pro costs $30 a month and self-hosting is limited to noncommercial use.

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

GAIA

  1. Set Settings > Approvals to Always ask or Auto before connecting mail. The default in the source runs every action, including send and delete, without asking.
  2. Expect no public API on the hosted service. The backend turns off its OpenAPI document in production, so reach GAIA through its apps, bots or CLI.
  3. Check the plan before relying on the hosted service. The README and docs describe a Free plan, and the pricing page says GAIA is a paid product.
  4. For self-hosting, prepare Docker, Node.js 20, a WorkOS account and a model key first, and confirm the use is noncommercial under the licence.
  5. Add outside tools as MCP servers by URL on the Integrations page. GAIA asks before adding a server in every approval mode.

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, GAIA or Gemini Spark?

GAIA scores 49.5 (D) on agent readiness against Gemini Spark's 24.5 (F), and leads in 6 of 7 scored categories. Gemini Spark leads on security & auth.

Other comparisons with GAIA or Gemini Spark

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