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.
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2FA to Tray

Copy 2FA tokens on macOS in a tap
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Antideo

Email, IP address and phone number validation API service

Avast Passwords for Mac

Free password manager from Avast
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Base API

API for authentication, email sending, images and more!

Castle

The easiest way to protect your users from getting hacked

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

SimpleID

Add decentralized auth and storage to your app in 10 minutes

SoloKeys

Secure login made open and easy 🔒

Step Two for Mac

Simple two-step verification for Mac

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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Vyse Auth

A privacy first 2FA token manager built with Blockstack
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YubiKey

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