# CowAgent vs Gemini Spark

> CowAgent scores 58.5 (C) to Gemini Spark's 24.5 (F) for assistant proactive. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/cowagent-vs-gemini-spark
- Markdown: https://www.anchorterminal.com/compare/cowagent-vs-gemini-spark.md (~2,700 tokens)
- Slim: https://www.anchorterminal.com/compare/cowagent-vs-gemini-spark.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/cowagent-vs-gemini-spark.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-12

CowAgent scores 58.5 (C) on agent readiness against Gemini Spark's 24.5 (F), and leads in 5 of 7 scored categories. Gemini Spark leads on security & auth. Both do assistant proactive.

- CowAgent: grade C, 58.5/100, rank #591 of 986. Markdown https://www.anchorterminal.com/tools/cowagent.md · JSON https://www.anchorterminal.com/api/v1/tools/cowagent.json
- Gemini Spark: grade F, 24.5/100, rank #974 of 986. Markdown https://www.anchorterminal.com/tools/gemini-spark.md · JSON https://www.anchorterminal.com/api/v1/tools/gemini-spark.json
- Best AI personal assistants that act for one person: https://www.anchorterminal.com/best/personal-assistants/index.md
- All 190 assistants comparisons: https://www.anchorterminal.com/compare/personal-assistants/index.md

## Which one, for what

### CowAgent (C)

Good for: One technical owner who wants an assistant on WeChat, Feishu, DingTalk, Telegram, Slack or Discord with memory in local files and a choice of Chinese and Western model providers.

Ahead on:
- Reliability, 84 against 14
- Schema & documentation, 67 against 17
- Agent ergonomics, 59 against 9
- Payments & pricing, 60 against 10
- Maintenance & community, 83 against 17

Also in its favour:
- Free to start without a card
- Open source

Watch for: Source and Docker installs default to full-access, and no mode asks the owner before a shell command, a file send or an MCP call

### 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:
- Security & auth, 60 against 43

Also in its favour:
- No incidents deducted, where CowAgent 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

| Category | Weight | CowAgent | Gemini Spark | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 84 | 14 | CowAgent +70 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 67 | 17 | CowAgent +50 |
| Agent ergonomics | 13% (16.2 this run) | 59 | 9 | CowAgent +50 |
| Security & auth | 14% (17.5 this run) | 43 | 60 | Gemini Spark +17 |
| Payments & pricing | 10% (12.5 this run) | 60 | 10 | CowAgent +50 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 83 | 17 | CowAgent +66 |
| Transparency & trust | 7% (8.8 this run) | 45 | 49 | Gemini Spark +4 |
| Negative events | ≤15 | -5 | 0 | |
| **Total** | | **58.5 · C** | **24.5 · F** | |

## Facts side by side

| Fact | CowAgent | Gemini Spark |
| --- | --- | --- |
| Kind | Agent harness | Platform |
| Vendor | zhayujie | Google LLC |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | HTTP |  |
| Auth | OAuth or key | OAuth |
| Pricing | Free | Paid |
| x402 | no | no |
| Licence | MIT | Proprietary hosted service under the Google Terms of Service |
| Read-only variant documented | yes | no |
| llms.txt | yes | no |
| Last release | 2026-09-30 | 2026-05-19 |
| Terms last updated | no document linked | 2026-07-30 |
| Privacy policy last updated | no document linked | 2026-09-24 |
| Customer content may train models |  | yes, with an opt-out |
| Terms restrict automated access |  | yes |
| Terms restrict benchmarking |  | not found in the text |
| Terms or service can change without notice |  | not found in the text |
| Arbitration or class-action waiver |  | not found in the text |
| Popularity | 47k stars | none |

## Verdicts

**CowAgent.** MIT software with seven releases in 90 days, memory kept as plain files in the owner's workspace and three per-session permission modes. Source and Docker installs default to full-access, no action asks for approval, and an open report of 31 July 2026 says group members could reach the owner's files through the bot.

**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

### CowAgent

1. Set `agent_permission_mode` to `workspace-write` or `read-only` before connecting any channel. Source and Docker installs default to `full-access`
2. Keep the bot out of group chats that include other people. Any member who mentions it reaches the same tools as the owner
3. Set `web_password` before changing `web_host` to `0.0.0.0`. The password is empty by default
4. Set `external_api_token` to enable `POST /v1/chat/completions`, and send `conversation_id` to keep one session. The `model` field does not select a model
5. Run it in a container for a hard boundary. The docs and the source both say the permission modes are not isolation

### 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, CowAgent or Gemini Spark?

CowAgent scores 58.5 (C) on agent readiness against Gemini Spark's 24.5 (F), and leads in 5 of 7 scored categories. Gemini Spark leads on security & auth.

### Are CowAgent and Gemini Spark open source?

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


## For agents

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

## Other comparisons with CowAgent or Gemini Spark

- [AstrBot vs CowAgent](https://www.anchorterminal.com/compare/astrbot-vs-cowagent.md)
- [AstrBot vs Gemini Spark](https://www.anchorterminal.com/compare/astrbot-vs-gemini-spark.md)
- [CowAgent vs GAIA](https://www.anchorterminal.com/compare/cowagent-vs-gaia.md)
- [CowAgent vs Grok Bot](https://www.anchorterminal.com/compare/cowagent-vs-grok-bot.md)
- [CowAgent vs Haven](https://www.anchorterminal.com/compare/cowagent-vs-haven.md)
- [CowAgent vs Hermes Agent](https://www.anchorterminal.com/compare/cowagent-vs-hermes-agent.md)
- [CowAgent vs Instinct](https://www.anchorterminal.com/compare/cowagent-vs-instinct.md)
- [CowAgent vs IronClaw](https://www.anchorterminal.com/compare/cowagent-vs-ironclaw.md)
- [CowAgent vs Leon](https://www.anchorterminal.com/compare/cowagent-vs-leon.md)
- [CowAgent vs Lindy](https://www.anchorterminal.com/compare/cowagent-vs-lindy.md)
- [CowAgent vs nanobot](https://www.anchorterminal.com/compare/cowagent-vs-nanobot.md)
- [CowAgent vs NanoClaw](https://www.anchorterminal.com/compare/cowagent-vs-nanoclaw.md)
- [CowAgent vs Dots](https://www.anchorterminal.com/compare/cowagent-vs-openai-dots.md)
- [CowAgent vs OpenClaw](https://www.anchorterminal.com/compare/cowagent-vs-openclaw.md)
- [CowAgent vs PicoClaw](https://www.anchorterminal.com/compare/cowagent-vs-picoclaw.md)
- [CowAgent vs Poke](https://www.anchorterminal.com/compare/cowagent-vs-poke.md)
- [CowAgent vs QwenPaw](https://www.anchorterminal.com/compare/cowagent-vs-qwenpaw.md)
- [CowAgent vs ZeroClaw](https://www.anchorterminal.com/compare/cowagent-vs-zeroclaw.md)
- [CowAgent vs Zo Computer](https://www.anchorterminal.com/compare/cowagent-vs-zo-computer.md)
- [GAIA vs Gemini Spark](https://www.anchorterminal.com/compare/gaia-vs-gemini-spark.md)
- [Gemini Spark vs Grok Bot](https://www.anchorterminal.com/compare/gemini-spark-vs-grok-bot.md)
- [Gemini Spark vs Haven](https://www.anchorterminal.com/compare/gemini-spark-vs-haven.md)
- [Gemini Spark vs Hermes Agent](https://www.anchorterminal.com/compare/gemini-spark-vs-hermes-agent.md)
- [Gemini Spark vs Instinct](https://www.anchorterminal.com/compare/gemini-spark-vs-instinct.md)
- [Gemini Spark vs IronClaw](https://www.anchorterminal.com/compare/gemini-spark-vs-ironclaw.md)
- [Gemini Spark vs Leon](https://www.anchorterminal.com/compare/gemini-spark-vs-leon.md)
- [Gemini Spark vs Lindy](https://www.anchorterminal.com/compare/gemini-spark-vs-lindy.md)
- [Gemini Spark vs nanobot](https://www.anchorterminal.com/compare/gemini-spark-vs-nanobot.md)
- [Gemini Spark vs NanoClaw](https://www.anchorterminal.com/compare/gemini-spark-vs-nanoclaw.md)
- [Gemini Spark vs Dots](https://www.anchorterminal.com/compare/gemini-spark-vs-openai-dots.md)
- [Gemini Spark vs OpenClaw](https://www.anchorterminal.com/compare/gemini-spark-vs-openclaw.md)
- [Gemini Spark vs PicoClaw](https://www.anchorterminal.com/compare/gemini-spark-vs-picoclaw.md)
- [Gemini Spark vs Poke](https://www.anchorterminal.com/compare/gemini-spark-vs-poke.md)
- [Gemini Spark vs QwenPaw](https://www.anchorterminal.com/compare/gemini-spark-vs-qwenpaw.md)
- [Gemini Spark vs ZeroClaw](https://www.anchorterminal.com/compare/gemini-spark-vs-zeroclaw.md)
- [Gemini Spark vs Zo Computer](https://www.anchorterminal.com/compare/gemini-spark-vs-zo-computer.md)