List of sites with two factor auth support for OTP and U2F hardware dongles.

2 years after

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A list of popular sites and whether or not they accept authentication with USB dongles.

The Goal

The goal is to have a website with a comprehensive list of sites that support One Time Passwords (OTP) or Universal 2nd Factor (U2F).

This is to aid when deciding on alternative services based on the security they offer for their customers.

This also is a way for consumers to see what sites still need to invest in further security practices and which ones already do.


If you'd like to contribute, read the entire guidelines here in


This code is distributed under the MIT license. For more info, read the LICENSE file distributed with the source code.