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Second Brain OS

Privacy-first productivity system in a single file

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Self-Reported Revenue

The creator of Second Brain OS has reported monthly revenues of $0.

This figure was last updated May 17, 2026, and has not been independently verified.

About

Every app I tried was too complex or stored my private data on their servers. I built a single HTML file that works offline, keeps everything private, and actually sticks. Your thoughts should belong to you.​​​​​​​​​​​​​

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MJ37Founder