A diary only you can read.
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Boilerplate
Encrypted Diary is an end-to-end encrypted journaling app from Sagentica. Every entry is encrypted on-device before it ever leaves the keyboard — the company holds no keys, no passphrase, and cannot read a single word, by design and by sworn declaration. The app includes an optional, fully local AI companion, a legacy-release system for passing entries to loved ones after death, and a lifetime license with no required subscription.
Quotable
Fast facts
Encryption: XChaCha20-Poly1305, keys derived via Argon2id — never transmitted, never held by us.
Platforms: Works in any browser (Diary Lite) and as a Windows desktop app with a local AI companion.
Pricing: One-time license to own; optional subscription for updates and encrypted cloud backup.
Maker: Sagentica, built on the QAICX platform.
Logo & assets
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