Padloc
Securely store passwords, credit cards, notes, and files with end-to-end encryption. Available on all major platforms with sharing and multi-factor authentication.
Padloc is an open-source alternative to:

Padloc is an open-source, end-to-end encrypted password manager designed to securely store sensitive data like passwords, credit cards, notes, documents, and more.
Key Features
- End-to-End Encryption: All data is encrypted before leaving your device, ensuring only you can access it.
- Cross-Platform Support: Available on Windows, macOS, Linux, iOS, Android, and as browser extensions.
- Secure Sharing: Share passwords and documents securely with family, coworkers, or teams.
- Multi-Factor Authentication: Enhance security with built-in authenticator and MFA support.
- Encrypted File Storage: Store and manage files securely with up to 1GB storage in premium plans.
- Rich Text Notes: Create and organize notes with markdown support.
- Security Reports: Monitor and improve your password security with automated reports.
- Open Source & Audited: Transparently developed with independent security audits for trust.
Tech / Self-Hosting
Padloc is open-source and can be self-hosted for complete control over your data. The project is built with modern web technologies and offers both cloud and self-hosted deployment options. For self-hosting, refer to the official documentation.