TwoBlocks

A 2FA provider on BlockStack

21 Alternatives To TwoBlocks

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1Password

1Password can create strong, unique passwords for you, remember them, and restore them, all directly in your web browser. 1Password is the easiest way to store and use strong passwords. Log in to sites and fill forms securely with a single click.

Avast Passwords for Mac

Free password manager from Avast

GenerateOTP

A simple API to generate and validate OTP codes
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Google Titan

A 2FA device to protect yourself from hackers
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Hydro Mobile App

Free, instant, scalable, blockchain-based 2FA security
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Instant 2FA

Add two-factor auth to any site in minutes
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MasterPassword

Master Password avoids all the pitfalls: a cryptographic algorithm calculates your site’s password for you, only when you need it. When you’re done, it erases the password from the device, so it can’t be stolen.

Nitrokey

Email Encryption. Encrypt your emails with GnuPG, OpenPGP, S/MIME or your favourite email client.

Rapid 2FA

A painless way to add two-factor authentication to your site

Two Factor Auth (2FA)

List of websites and whether or not they support 2FA
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Two-factor authentication for Apple ID

To ensure you’re the only person who can access your account

Verifier

Weed out disposable, non-existent domains or invalid emails.
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YubiKey

The YubiKey is a one-time password device for secure login with two-factor authentication