Side by side
Jules vs Spettro
Both stand on ai coding assistants. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APILinuxWeb
Jules handles repository changes through an approval-first plan and pull-request workflow. Its cloud execution environment has internet access, so Google advises reviewing changes and avoiding secrets in repositories.
Visit Jules Free plan APILinuxMac+2
Spettro combines repository-focused agents with local and hosted model options, and its free plan includes the full feature set for users supplying an API key. Paid tiers add hosted models and stated monthly quotas, so compare their allowances and support needs.
Visit SpettroThe facts
| Jules | Spettro | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Linux, Web | API, Linux, Mac, Web, Windows |
| Lowest paid plan | Free or on request | Lite: €5 a month |
| Plans published | 3 | 5 |
| Maker | Not published | Not published |
| Website | jules.google | spettro.app |
| On ai coding assistants | #32 of 103 | #28 of 103 |
Jules: what it does well
- Plan approval precedes code changes.
- Provides diffs and pull requests for review.
- Can act on failed GitHub Actions checks.
- Private repository content is not used to train models.
- Free plan is listed.
What to know first
- Code runs in an internet-connected cloud virtual machine.
- Long-running servers and watch scripts are unsupported in setup scripts.
- Paid plans require an individual @gmail.com account.
- Users can have at most three API keys.
Spettro: what it does well
- Free plan includes all features with your own API key.
- Roles cover planning, coding, review, and testing.
- Supports local model endpoints such as Ollama.
- Skills and runtime hooks can be added.
- API keys are encrypted locally with AES-GCM.
What to know first
- Free plan requires users to bring their own API key.
- Only Zed is listed as a supported IDE.
- Inference messages are forwarded to model providers.
- Paid-plan quotas vary by tier and model use.
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