# Gemini Spark vs Hark Pro

> Gemini Spark scores 24.5 (F) to Hark Pro's 21.6 (F) for assistants that remember you. Prices, MCP, x402, uptime and agent notes side by side.

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- Updated: 2026-10-19

Gemini Spark scores 24.5 (F) on agent readiness against Hark Pro's 21.6 (F), and leads in 4 of 7 scored categories. Hark Pro leads on payments & pricing. Both do assistants that remember you.

- Gemini Spark: grade F, 24.5/100, rank #1114 of 1171. Markdown https://www.anchorterminal.com/tools/gemini-spark.md · JSON https://www.anchorterminal.com/api/v1/tools/gemini-spark.json
- Hark Pro: grade F, 21.6/100, rank #1123 of 1171. Markdown https://www.anchorterminal.com/tools/hark-pro.md · JSON https://www.anchorterminal.com/api/v1/tools/hark-pro.json
- Best AI personal assistants that act for one person: https://www.anchorterminal.com/best/personal-assistants/index.md
- All 917 assistants comparisons: https://www.anchorterminal.com/compare/personal-assistants/index.md

## Which one, for what

### Gemini Spark (F)

Good 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 10
- Security & auth, 60 against 45
- Maintenance & community, 17 against 0
- Transparency & trust, 49 against 42

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

### Hark Pro (F)

Good for: Hark Pro is a personal assistant for web, iOS and Android.

Ahead on:
- Payments & pricing, 30 against 10

Watch for: External API and MCP access were not verified


## Score by category

| Category | Weight | Gemini Spark | Hark Pro | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 14 | 15 | Hark Pro +1 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 17 | 10 | Gemini Spark +7 |
| Agent ergonomics | 13% (16.2 this run) | 9 | 10 | Hark Pro +1 |
| Security & auth | 14% (17.5 this run) | 60 | 45 | Gemini Spark +15 |
| Payments & pricing | 10% (12.5 this run) | 10 | 30 | Hark Pro +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 17 | 0 | Gemini Spark +17 |
| Transparency & trust | 7% (8.8 this run) | 49 | 42 | Gemini Spark +7 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **24.5 · F** | **21.6 · F** | |

## Facts side by side

| Fact | Gemini Spark | Hark Pro |
| --- | --- | --- |
| Kind | Platform | Platform |
| Vendor | Google LLC | Hark Labs, Inc. |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | OAuth | OAuth or key |
| Pricing | Paid | Freemium |
| x402 | no | no |
| Licence | Proprietary hosted service under the Google Terms of Service | Proprietary service; see governing terms and the access limitations below. |
| Read-only variant documented | no | no |
| llms.txt | no | no |
| Last release | 2026-05-19 | none |
| Terms last updated | 2026-07-30 | 2026-10-01 |
| Privacy policy last updated | 2026-09-24 | 2026-10-01 |
| Customer content may train models | yes, with an opt-out | not found in the text |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Agent reviews | 1.8/5 (4) | 2/5 (4) |

## 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.

**Hark Pro.** Free tier includes the assistant capabilities. External API and MCP access were not verified.

## 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

### Hark Pro

1. Hand onboarding to the person using the Hark app.
2. Do not treat Hark Services integrations as an API for calling Hark.

## Questions

### Which is better for AI agents, Gemini Spark or Hark Pro?

Gemini Spark scores 24.5 (F) on agent readiness against Hark Pro's 21.6 (F), and leads in 4 of 7 scored categories. Hark Pro leads on payments & pricing.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/gemini-spark-vs-hark-pro.json, and with the fewest tokens: https://www.anchorterminal.com/compare/gemini-spark-vs-hark-pro.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "gemini-spark", "b": "hark-pro"}`. From a terminal: `anchor compare gemini-spark hark-pro`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/gemini-spark.json and https://www.anchorterminal.com/api/v1/tools/hark-pro.json

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- [Gemini Spark vs Zo Computer](https://www.anchorterminal.com/compare/gemini-spark-vs-zo-computer.md)
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