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Strongbox

Open source

Strongbox is a native iOS and macOS password manager that opens KeePass and Password Safe databases and supports YubiKey.

strongboxsafe.com
Strongbox homepage screenshot
GitHub stars
1.5k
Last commit
2 mo ago
Repository age
10 years
Licence
AGPL-3.0
Self-hosted
Yes

About Strongbox

Strongbox is a native password manager for iOS and macOS built by independent developers. It works with open, portable file formats: Password Safe version 3 and the KeePass formats, including KDB and KDBX versions 3.1 and 4, so your vault is not locked into a proprietary database.

Entries and groups are encrypted using algorithms such as Twofish, Argon2d, ChaCha20, AES and Salsa20 along with SHA-256 hashing, HMACs and secure random generators, and file attachments can be stored in KeePass-format safes. YubiKey is supported. The app is written in Objective-C and distributed through the Apple App Store, and translations are managed through a separate MIT-licensed project called Babel, with volunteer translators credited in many languages.

The source code is licensed under AGPL-3.0, and the README explains ways to support development, including purchasing a subscription or lifetime license through the App Store. Your database files are stored where you choose, so no hosted service is required.

Key features

  • Opens KeePass and Password Safe databases
  • KDBX 3.1 and 4 support
  • Strong encryption options
  • YubiKey support
  • File attachments in KeePass safes
  • Native iOS and macOS apps

Good fit for

  • →Using KeePass vaults on iPhone and Mac
  • →Native password management without a cloud account
Built with
Objective-C
Tags
password-manager
keepass
ios
macos
yubikey
encryption
objective-c
password-safe

Strongbox: questions and answers

What is Strongbox used for?
Strongbox is a native iOS and macOS password manager that opens KeePass and Password Safe databases and supports YubiKey. It is a good fit for using KeePass vaults on iPhone and Mac, and native password management without a cloud account.
Is Strongbox open source?
Yes. Strongbox is open source under the AGPL-3.0 licence. Its source code is on GitHub at strongbox-password-safe/Strongbox and is written mainly in Objective-C.
Is Strongbox free?
Yes. Strongbox is open source, so the software itself is free to use.
Can I self-host Strongbox?
Yes. Strongbox can be self-hosted on your own server or infrastructure; there is no official hosted version.
What is Strongbox an alternative to?
Strongbox is an open-source alternative to Enpass, Dashlane, 1Password and Norton Password Manager. Other open-source alternatives to Enpass include KeePassXC and AuthPass.
Is Strongbox actively maintained?
Yes. The most recent commit to Strongbox was on 17 July 2026. The project has 1.5k stars on GitHub.

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