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

Boba vs Gemini Spark

Gemini Spark scores 24.5 (F) on agent readiness against Boba's 10.3 (F), and leads in 5 of 7 scored categories. Boba leads on payments & pricing. Both do assistants that remember you.

Best AI personal assistants that act for one person · All 834 assistants comparisons

Bobahumans& ai, inc. · Platform F10.3/100#1004 of 1010 Gemini SparkGoogle LLC · Platform F24.5/100#982 of 1010

Which one, for what

Boba F

Best for Groups who want a free assistant inside a shared chat for planning, drafting and images.

Ahead on

  • Payments & pricing, 30 against 10

Also in its favour

  • Free to start without a card

Watch for

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

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

  • Schema & documentation, 17 against 0
  • Agent ergonomics, 9 against 0
  • Security & auth, 60 against 0
  • Maintenance & community, 17 against 2
  • Transparency & trust, 49 against 39

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 runBobaGemini SparkEdge
Reliability16%201514Boba +1
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.2017Gemini Spark +17
Agent ergonomics13%16.209Gemini Spark +9
Security & auth14%17.5060Gemini Spark +60
Payments & pricing10%12.53010Boba +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8217Gemini Spark +15
Transparency & trust7%8.83949Gemini Spark +10
Negative events≤1500
TotalF 10.3/100F 24.5/100

Facts side by side

FactBobaGemini Spark
KindPlatformPlatform
Vendorhumans& ai, inc.Google LLC
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyOAuth
PricingFreePaid
x402nono
LicenceClosed service under Boba's Terms of Service (humans& ai, inc., last updated 5 October 2026).Proprietary hosted service under the Google Terms of Service
Read-only variant documentednono
llms.txtnono
Last releasenone2026-05-19
Terms last updated2026-07-30
Privacy policy last updated2026-09-24
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

Verdicts

Boba

Boba is a free texting assistant for one-to-one and group chats over iMessage, RCS and SMS, started by sending one message with no card or app. No outside agent can call it, its privacy notice uses inputs and outputs to train its models with no opt-out found, and no status page or security contact was found.

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

Boba

  1. Don't plan to call Boba from another agent. It answers only text messages in the Messages app.
  2. Tell people in a group chat that messages sent to Boba may be used to train its models.

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, Boba or Gemini Spark?

Gemini Spark scores 24.5 (F) on agent readiness against Boba's 10.3 (F), and leads in 5 of 7 scored categories. Boba leads on payments & pricing.

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Disclosure

Boba 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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