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

Atticus vs Gemini Spark

Atticus scores 42.9 (E) on agent readiness against Gemini Spark's 24.5 (F), and leads in 4 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 875 assistants comparisons

AtticusSaarthurR (Saarth Ranka) · Platform E42.9/100#974 of 1094 Gemini SparkGoogle LLC · Platform F24.5/100#1046 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 14
  • Payments & pricing, 60 against 10
  • Maintenance & community, 51 against 17
  • Transparency & trust, 56 against 49

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

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 49

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 runAtticusGemini SparkEdge
Reliability16%206814Atticus +54
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.21517Gemini Spark +2
Agent ergonomics13%16.299even
Security & auth14%17.54960Gemini Spark +11
Payments & pricing10%12.56010Atticus +50
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.85117Atticus +34
Transparency & trust7%8.85649Atticus +7
Negative events≤1500
TotalE 42.9/100F 24.5/100

Facts side by side

FactAtticusGemini Spark
KindPlatformPlatform
VendorSaarthurR (Saarth Ranka)Google LLC
Hosted endpointno (local only)no (local only)
Transports
AuthNoneOAuth
PricingYour planPaid
x402nono
LicenceMITProprietary hosted service under the Google Terms of Service
Read-only variant documentednono
llms.txtnono
Last release2026-10-142026-05-19
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
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.

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

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

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, Atticus or Gemini Spark?

Atticus scores 42.9 (E) on agent readiness against Gemini Spark's 24.5 (F), and leads in 4 of 7 scored categories. Gemini Spark leads on security & auth.

Are Atticus and Gemini Spark open source?

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

Other comparisons with Atticus or Gemini Spark

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