When comparing onlykey vs PassPilot.com, the Slant community recommends onlykey for most people. In the question“What are the best offline password managers?” onlykey is ranked 27th while PassPilot.com is ranked 37th.
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Pros
Pro Completely offline (separate hardware)
Pro Stores 2FA
FIDO U2F, Google Auth TOTP, Yubikey OTP.
Pro Can be used for secure messages with Keybase PGP
Pro Open Source
Pro Free
100% free, with no ads of course.
Pro Source code of the application is publicly available
Anyone with good knowledge of JavaScript can review the code (nothing is compiled).
Pro Two language versions
Available in English and Polish.
Pro Two color schemes
Pro Contains strong password generator
Pro Off the grid
Probably the best feature of this application is that you can save everything to a single file and use the application offline (every offline feature is available including adding new records), no limits, no ads, for free, forever! Keep it on a flash drive, local drive or any cloud storage of your choice.
Pro Client side encryption
No one will ever know your password which is also never sent anywhere (encryption takes place in your browser). You are double protected as encrypted vault is sent over encrypted SSL connection.
Pro Strong client side AES encryption (256bits)
Using the Stanford Javascript Crypto Library (SJCL).