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Head to head

1Password vs Bitwarden

These are the two strongest vaulted managers, and the choice is genuinely close. 1Password's Secret Key means a stolen vault cannot be attacked with your password alone — a real structural advantage. Bitwarden is source-available with more published audits, has a genuinely unlimited free tier, and lets you pick Argon2id.

Facts reviewed 2026-08-01. Every row below is sourced, and anything a vendor does not publish is marked as such rather than estimated.

The question that decides it

Do you want the extra 128-bit Secret Key protecting your vault, or open code and a free tier with no item limits?

Choose 1Password if

you want the strongest protection for a cloud-stored vault and will pay for it.

Choose Bitwarden if

you want published audits, source you can read, and a free tier that does not expire.

Side by side

Comparison of 1Password and Bitwarden by security and account features
 1PasswordBitwarden
Storage modelCloud-synced encrypted vaultCloud-synced encrypted vault
Key derivationKey derivation sets how expensive each attacker guess is. A vendor that does not publish its parameters cannot be independently compared on this.PBKDF2-HMAC-SHA256, 650,000 iterationsPBKDF2-HMAC-SHA256 at 600,000 iterations (default), or Argon2id at 32 MiB / 6 iterations / 4 lanes
Source codeProprietarySource available; clients are open source, some server components use the Bitwarden License rather than AGPL
Independent auditsPublishes independent assessments, including a 2020 ISE code review, plus ongoing penetration testing via its Trust Center.Numerous published reports from Cure53, IOActive, ETH Zurich and Unit 42.
Free tierNo permanent free tierYes — unlimited items and devices
Main free-tier limitNo free tierEmergency Access is premium-only, and free organisation sharing is capped at two users
Account recoveryReusable recovery codes for individual and family accounts; family organisers and business admins can recover other members.No master-password reset for personal accounts unless Emergency Access was configured in advance. Enterprise admins can perform enrolled account recovery.
PasskeysSaves, syncs, shares and uses website passkeys.Stores and uses website passkeys; passkey login to the Bitwarden account itself requires a PRF-capable browser.
PlatformsmacOS, Windows, Linux, iOS, Android, plus major browser extensions.All major desktop and mobile OSes, browsers, a web vault and a CLI.
Documented incidents“None found” means no authoritative report surfaced during research. It is not a claim that no incident has ever occurred.September 2023: an attacker used a session tied to the Okta support breach to reach 1Password's employee Okta tenant. 1Password reported no compromise of user data.None found in published sources

How 1Password works

A cloud-synced vault encrypted and decrypted on your device with AES-GCM-256. Uniquely, it is protected by two secrets: your account password and a randomly generated 128-bit Secret Key, which means a stolen vault cannot be attacked with the password alone.

Key derivation
PBKDF2-HMAC-SHA256, 650,000 iterations
If you forget the master password
Recovery is possible — Reusable recovery codes for individual and family accounts; family organisers and business admins can recover other members.

How Bitwarden works

A cloud-synced vault encrypted locally, which can also be self-hosted. Bitwarden documents the design as end-to-end encrypted and zero-knowledge in a published security white paper.

Key derivation
PBKDF2-HMAC-SHA256 at 600,000 iterations (default), or Argon2id at 32 MiB / 6 iterations / 4 lanes
If you forget the master password
No recovery — No master-password reset for personal accounts unless Emergency Access was configured in advance. Enterprise admins can perform enrolled account recovery.
A third option

Both 1Password and Bitwarden store your passwords. MoolKey does not.

1Password and Bitwarden differ in how well they protect a stored copy of your passwords. MoolKey answers a different question: it recalculates each password from your private phrase and the site name whenever you need it, so no copy exists to protect. A breach would expose masked account names and integers, not credentials.

That is a real trade, not a free win. There is no autofill, no import of your existing passwords, and no recovery if you forget your phrase — none, by design. your private phrase never reaches the service, so nobody can reset it or reproduce a password derived from it.

How it worksFull comparison

1Password vs Bitwarden FAQ

What is the main difference between 1Password and Bitwarden?
1Password uses cloud-synced encrypted vault, while Bitwarden uses cloud-synced encrypted vault. These are the two strongest vaulted managers, and the choice is genuinely close. 1Password's Secret Key means a stolen vault cannot be attacked with your password alone — a real structural advantage. Bitwarden is source-available with more published audits, has a genuinely unlimited free tier, and lets you pick Argon2id.
Is 1Password or Bitwarden more secure?
Security here is mostly about verifiable design rather than marketing. 1Password uses pbkdf2-hmac-sha256, 650,000 iterations. Bitwarden uses pbkdf2-hmac-sha256 at 600,000 iterations (default), or argon2id at 32 mib / 6 iterations / 4 lanes. Do you want the extra 128-bit Secret Key protecting your vault, or open code and a free tier with no item limits?
Can I recover my account if I forget the master password?
1Password: Reusable recovery codes for individual and family accounts; family organisers and business admins can recover other members. Bitwarden: No master-password reset for personal accounts unless Emergency Access was configured in advance. Enterprise admins can perform enrolled account recovery.
Does 1Password or Bitwarden have a free plan?
1Password: No permanent free tier. Bitwarden: Yes — unlimited items and devices, though emergency Access is premium-only, and free organisation sharing is capped at two users.
Has 1Password or Bitwarden ever been breached?
1Password: September 2023: an attacker used a session tied to the Okta support breach to reach 1Password's employee Okta tenant. 1Password reported no compromise of user data.. Bitwarden: no authoritative breach report was found during research, which is not the same as a guarantee that none has occurred.

Sources

Every factual claim above traces to vendor documentation or published reporting. Where a vendor does not publish a figure, this page says so instead of repeating a number from a comparison table we cannot verify.

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