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Picocrypt vs Deadbolt: catalog facts
Picocrypt	Deadbolt
Free Free and open source, no longer developed.	Free Free and open source under the MIT licence.
Windows, macOS, Linux	Windows, macOS, Linux, Command line
XChaCha20 and Argon2id, with a design deliberately small enough to audit Standalone portable executable on Windows, with no installation	Password-only encryption with very little to configure Encrypted files work across macOS, Windows and Linux
Permanently archived and read-only since September 2025; there will be no more releases Encrypts individual files, not partitions, drives or cloud folders	No auto-updates on Linux Not a replacement for full-disk encryption
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.