I've worked in B2B SaaS for a while and haven't found any solutions that are specifically designed for measuring + managing customer engagement at an Account / Company level. More specifically:
• Measure company / account engagement - who's happy / might churn.
• Track user engagement - understand who power users are 💪
• Collect feedback - Create custom segments based on user attributes (engagement, title, company, etc.) to get feedback on product / features.
Is kind of link inverted Mixpanel: Bottom-up user analytics as opposed to top-down.