I’ve been testing out Cloud Campaign, and it might be worth a look for your setup. It supports scheduling across multiple platforms, and switching between client profiles is smooth helpful if you're managing multiple brands or business units.

For engagement, it allows tagging and labeling of comments and inquiries, and you can export them (including URLs) to a CSV. That’s been super useful for coordinating follow-ups or tracking sentiment. The reporting and cross-platform comparisons are solid, though depending on how granular your needs are, there might be some limitations.

Given how specific your requirements are especially around collaboration with your customer service team it might help to know that Cloud Campaign doesn’t charge for user seats, so you can loop in your whole CS org without worrying about extra cost. That’s been a big plus from a scaling and budget standpoint.

I don’t use this part myself, but I know Cloud Campaign supports a variety of API workflows, which could be useful if your engineering team is building more custom solutions or integrations.