Psono
Psono is the only option that allows you to self-host, giving that extra level of security.
Features
Offline Access
Local-only vault storage for full offline access
Partial User Support
Forum, community app or email where support within 24 hours is available
Regular Audits
Independent security audits are conducted periodically and publically accessible
Platforms
Browser
Accessible through any web browser
Windows
Available app for Windows computers
Mac OS
Available app for macOS computers
Linux
Available app for Linux computers
Android
Available on any Android devices
iOS
Available on any iOS devices