Password managers are the single most impactful security tool you can adopt. Security: All four use AES-256 encryption with zero-knowledge architecture. Bitwarden’s open-source architecture has completed independent security audits. 1Password’s Secret Key adds a second factor tied to your device. Features: Bitwarden offers the best free tier. 1Password Families includes emergency access and travel mode. Dashlane includes built-in VPN. Usability: 1Password wins on UX. Value: Bitwarden Premium at $10/year undercuts competitors at $36-48/year. Our testing included 500 login autofill operations. Read our full analysis to find the password manager matching your threat model.