KeePass being open source means that a number of people have reviewed the code and found it to be secure.

KeePass is consistent and stable across all clients including merging conflicts between desktop and mobile apps

Keepass offers a combination of master password, key file and user account verification.

Unlike many other password management tools, by default the KeePass encrypted database is not stored in the cloud, but strictly locally, for added security.

Keepass offers a range of plugins and extensions in different categories: Integration & Transfer, Automation & Scripting, Cryptography & Key Providers, and others.

Appending attachments to individual credential entries allows things like scanning important documents (for instance a scanned document containing the login information for your internet connection), appending them to the corresponding credential entry and afterwards destroying the original paper copy.

Users may define any extra fields (eg. "Surname", "Credit Card No", "Start Date", "Expiry Date" and "Security No") and their values may then be easily copy-and-pasted when required. This is a great feature not found in a lot of password-managers: they leave you to consign such additional information to the "Notes" section.

With the built-in history you can lookup previous passwords, track changes in general and if necessary recover those. In essence you are looking at a built-in Version Control System (VCS) which operates on single entries. Browsing the history of specific entries also displays associated metadata like the date of a change.

Password generator can be adjusted to use or exclude certain characters, patterns, external algorithms and principles.