Consider using Zoho Vault. Its an online password management solution tailor made for teams. The product is loaded with a wide-range of features including fine-grained password sharing options, access control, IP restriction, audit and reports, mobile access, browser extensions, two-factor, AD, SAML, G Suite integration, break-glass account, etc.

https://www.zoho.com/vault

You can sign up for free without providing your credit card details and evalauate the solution for free - 15 days.

Disclaimer: I work for Zoho Vault

How about https://psono.com

You can host it yourself and it has client side encryption. You can share folders across multiple users.

(Full disclosure, im the creator)

Definitely take a look a 1Password. Great integration across multiple platforms (OS, browsers, smartphones) and for teams it's nice to have different vaults and assign users different permissions for vaults.

The thing I like about 1Password is that it integrates with all the major browsers, but it doesn't require a browser to work. And the app on iOS is full-featured.

I don't know if they support Linux, however.

I use 1Pass, you can have multiple vaults with different permissions and sharing for each one. I also like the native clients for each platform.