Second Brain
1 0Second Brain lets you index local files—documents, images, PDFs, and other formats—by both name and content.
- Category
- Infrastructure
- Pricing
- Details on the service site
- Free plan
- Yes
- Platforms
- Desktop app
- Use case
- Q&A over documents
Second Brain lets you index local files—documents, images, PDFs, and other formats—by both name and content. It combines semantic search with keyword search, lets you search using text and images, and works offline with local models.
AI indexes everything—documents, PDFs, images, notes, even text within images. It combines semantic and keyword search, and recognizes content in many languages and formats, including .pdf, .docx, .png, .gif, and more. Everything runs directly on your device, with no internet connection or data sent to the cloud.
FAQ
Do I need a VPN or proxy to use the service?
It depends on your region. If the service is not available in your country, its site says so; a VPN or proxy is a way around regional limits, but follow the rules of the service and the laws of your country. How to choose a proxy is covered in our guide to proxies for Claude. The easiest check is to open the service site.
Is it safe to share my data with an AI tool?
Do not enter passwords, payment details, personal data or trade secrets. Many services store requests and may use them to train models, especially on free plans. Check the privacy policy and the settings of the service, where training can often be switched off.
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