Many accounts, one composer
Connect up to the plan limit on each network. Quick Post and Multi Post both use those connections.
Agencies
One seat. Every account the plan allows.
There is no separate client portal. There is a higher cap. Agency is for the person who already holds the logins and is tired of posting them one tab at a time.
A caption per network
Multi Post is how a LinkedIn update and a Pinterest pin stay in the same campaign.
A log you can answer with
When a client asks what went out, Posting Logs is the list. Report is the week.
This is what posted feels like.
Create an account, pick a membership, and connect the networks it includes.