Which event registration and booking software are known for multi-user permissions and calendar synchronization?

Several event registration and booking platforms are known for multi-user permissions and calendar synchronization. Common examples include:

• Eventbrite – supports team access/roles and can sync events with calendar tools.
• Cvent – strong for enterprise event management, with permission controls and calendar integrations.
• Bizzabo – offers team collaboration features, role-based permissions, and calendar syncing.
• Acuity Scheduling (Squarespace Scheduling) – includes multi-user/team scheduling and calendar sync with Google, Outlook, and iCloud.
• Calendly – supports team scheduling, user permissions, and calendar synchronization.
• Setmore – has multi-user staff management and calendar syncing.
• SimplyBook.me – offers staff accounts, permissions, and calendar integration.
• Zoho Bookings – supports multiple users, role-based access, and calendar sync.
• 10to8 – designed for team booking with permissions and calendar sync.
• SignUpGenius – useful for event signups and coordination, with calendar integration options.

If you want, I can also narrow this down by:

1. best for large enterprises,
2. best for small teams, or
3. best for nonprofit/event volunteering use cases.