What are some alternatives?
When comparing ManageEngine ADManager Plus and 1Password, you can also consider the following products
Oracle Identity Manager - Oracle Identity Management enables oganizations to effectively manage the end-to-end lifecycle of user identities across all enterprise resources.
Lastpass - LastPass is an online password manager and form filler that makes web browsing easier and more secure.
OneLogin - On-demand SSO, directory integration, user provisioning and more
Dashlane - Dashlane is a secure way to bypass tedious logins, forms, and purchases online. Save all of your information and save time in your online transactions.
Okta - Enterprise-grade identity management for all your apps, users & devices
KeePass - KeePass is an open source password manager. Passwords can be stored in highly-encrypted databases, which can be unlocked with one master password or key file.