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Quick decision
I want the most secure password manager available
You understand the threat model. You want the best KDF, verifiable zero-knowledge, and ideally full metadata encryption. You're prepared to accept less convenience for better security properties.
There is no single answer — the most secure option depends on which threat you're prioritising. For auditability: Bitwarden. For metadata privacy: Proton Pass. For cipher modernity: NordPass.
Bitwarden
Fits if verifiable zero-knowledge via open source is the criterion. Full stack on GitHub, Cure53 audited, self-hosting available, Argon2id KDF configurable.
Proton Pass
Fits if URL metadata encryption is the criterion. The only provider that encrypts this field. Swiss jurisdiction, open-source clients.
NordPass
Fits if cipher modernity and jurisdiction are the criteria. XChaCha20 with Argon2, Panama incorporation outside intelligence alliances.
Security is multi-dimensional. No single provider is strongest across every dimension. Define your primary threat first — server breach, legal compulsion, cipher attack, or audit gaps — then map to the provider that addresses it most directly.
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