1Password is available for Mac/Windows, iOS/Android, Safari/Firefox/Opera/Chrome.
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Pro A clean, good-looking and intuitive UI
An iteration on the UI brings a polished look that was already good-looking to begin with. It even tries pulling in relevant app and web icons, adds credit cards logos and has little animation to make the experience more pleasant.
Pro Browser integration
Easily fill in passwords with a single keystroke combination.
Quickly add new and update existing passwords right from the browser when the login is detected by the free browser extension.
Pro Easy to use autofill and password generator
Automatically logs into websites, enters credit card information, fills registration forms, and easily generates strong passwords. Password generator can be adjust to use or exclude certain characters and patterns.
Pro Cloud & Wi-Fi sync
1Password offers syncing through cloud storage services such as Dropbox and iCloud and a possibility to sync locally over Wi-Fi if you opt not to use cloud storage.
Pro Can also store software and license keys
Pro Can perform an audit on passwords
1Password can checks for weak, duplicate and old passwords you have stored.
Pro Available as a standalone application, a menubar app, and as browser extensions
Pro Doesn't depend on the cloud
Unlike many other password management tools, by default the 1Password encrypted database is not stored in the cloud, but strictly locally, for added security.
Pro TouchID support
All TouchID capable devices are supported.
Pro Collaborative password management
1Password offers an option to create a shared vault for sharing passwords among friends, family and co-workers.
Pro AES-256 encryption
Pro Warns of website vulnerabilities
A feature called Watchtower cross-references known website vulnerabilities with stored login information using a database that is updated daily.
Pro Time based one time passwords
Pro Version now supports time based one time passwords (instead of installing google authenticator)
Pro Great customer support
Con Not free/libre
This application is proprietary, and thus cannot be modified, freely distributed, or trusted to be secure.
Con Lacks native Linux support
No native app is available specifically for Linux making this a poor option for Linux users. Though there is 1Password for Families which offers a web app that can be accessed in any browser, but it does cost at least $5 a month, so not free.
Con Costly if needed for multiple devices
Con Has to be bought separately for each platform
Expensive if you wish to use 1Password on multiple platforms.
Con Lack of Google Drive sync
Only icloud, wifi and Dropbox support.
Con Lacks native BlackBerry and Windows Phone applications
No native app is available specifically for BlackBerry or Windows Phone devices.
There is a feature called 1PasswordAnywhere that's built-in to the 1Password vault, which provides read-only access of the database. However, you can use the web app from your phone. Though this may not be optimal for everyone, especially when considering the service is paid.
Con Does not auto-fill and generate passwords in Microsoft Edge for Windows 10
The 1Password Edge extension doesn't work as well as in other browsers, as it can't auto-fill and generate passwords. Only LastPass seems to have a fully-functional browser plugin for the Edge browser at this time.