Looking to set up a member directory or a way for your members to communicate with each other. There are many options out there to consider.
1) The URJ has a Yammer network that congregations can use to set up their own private network for members (some have done this already). Since this is already a live platform, it would be relatively easy to get set up. Learn more: https://www.microsoft.com/en-us/microsoft-365/yammer/yammer-overview
2) Group Spaces
6) Wild Apricot
These platforms would offer you the ability to pick and choose which features you want to use, and the software is well supported. You could then provide a link within your site to take members to one of these third party resources. If an embed option is available, you can do that too.