When comparing 1Password vs Keeper, the Slant community recommends 1Password for most people. In the question“What are the best offline password managers?” 1Password is ranked 5th while Keeper is ranked 10th. The most important reason people chose 1Password is:
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.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
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 Available as a webapp, as a standalone application, as an extension, and more, across most platforms, browsers, operating systems, and devices.
Versatility and synchronicity for the majority of the devices and platforms you use. Plus, all software is free with a paid subscription.
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 Can perform an audit on passwords
1Password can checks for weak, duplicate and old passwords you have stored.
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 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 Can also store software and license keys
Pro Collaborative password management
1Password offers an option to create a shared vault for sharing passwords among friends, family and co-workers.
Pro Time based one time passwords
Pro Version now supports time based one time passwords (instead of installing google authenticator).
Pro AES-256 encryption
For more information see here.
Pro TouchID support
All TouchID capable devices are supported.
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 Endorsed by many high credibility security experts
This app is endorsed by many high credibility security experts (for example, Troy Hunt ).
Pro Great customer support
Pro Can store secure notes
1Password can store secure notes which don't file cleanly into other areas like passwords or bank details. Secure notes can be used to record anything you want.
Pro Can use multiple vaults at once and search across vaults
One could manage a vault for work, a vault that's personal and a shared family vault while keeping the details of each segmented from each other and only sync'ed where/if desired.
Pro Active community of users and active / blogging development team
There is an immense sense of community and openness with 1Password.
Pro Periodically assessed by external security auditors and their findings are repaired quickly
Pro Available on multiple platforms
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 Makes use of keys so that password to login is never in transit
Pro Offline support
The vault supports offline access on all platforms.
Pro BreachWatch
Know if your usernames and passwords are on the Dark Web, without divulging your users names and passwords. Keeper has a proprietary method of keeping your data zero knowledge (only you know it) while verifying if it exists to malicious users.
Pro Available on all major platforms, OS & browser extensions
Keeper is available for download on Android, iOS, Windows, Mac, Windows Phone, Linux, Kindle, and Nook, and available as a browser extension for IE, Chrome, Firefox, Safari and Opera.
Pro Multiple certifications & security compliance
Keeper is a password manager that is certified and is security compliant with HITECH and HIPAA, SOC-2, TRUSTe, McAfee Secure, ES-EU Safe Harbor, PCI-DSS & U.S. Department of Commerce's Bureau of Industry and Security.
Pro Import from less secure solutions
Keeper supports importing from a myriad of other solutions.
Pro Cloud Sync and Backup
Your Keeper Vault is always backed up.
Pro Availability
Keeper has amazing up time.
Pro Easy onboarding of new users
6 different options to onboard new users:
Manual
CSV
Active Directory
SSO IdP
SCIM
CLI
Pro Enterpirses can integrate with SSO
Boost your companies ability to extend sign into sites and applications that don't support SSO. Keeper will integrate as a Service Provider (SP) to your Identity Provider (IdP).
Pro Drag and Drop and Sub Folder Support
Take control of your vault with the ability to nest folder and records and organize it your way.
Pro Multiple 2FA options including FIDO U2F
Keeper supports TOTP, Text, U2F, RSA, and Duo 2FA's.
Pro Support
Support is second to none.
Pro Strong access control and sharing
Very strong access control in the business version
Pro Multiple Views
Folder, Grid, and Record views supported with multiple sorting options.
Cons

Con Not open source (free/libre)
This application is proprietary, and thus cannot be modified, freely distributed, or trusted to be secure.
Con Inability to fill password sometimes
You have to fill twice to make it work.
Con Default is subscription model
It's really hard to find out how to obtain a full license.
Con Support sucks
Support does sometimes does not read requests thoroughly, and offers ham-baked or non-workable sulutions.
Con Unintuitive and slow responding UI
A hot mess of desktop applications and browser plugins that are supposed to work together, but don't always do. Browser plugins frequently become unresponsive and are very basic in comparison to other solutions.
Con Lack of Google Drive sync
Only icloud, wifi and Dropbox support.
Con Tough/impossible to get on Chromebook
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.
Con Unreasonably high price
It has a high monthly subscription price.
Con only subscription
No lifetime licence purchase possible
Con BreachWatch is not Free
BreachWatch, which is an amazing feature is not free. It is a paid upgrade.
Con Limited options in free version
Keeper is not the least expensive, but certainly not the most either. Good value for the features and support.
Con Been hacked several times.
Here are past vulnerabilities:
https://team-sik.org/trent_portfolio/password-manager-apps/
Con Requires a slight amount of set up and configuration
Keeper does a good job of walking you through the process of getting setup, but if you are not very technical it could be confusing.
