Is "scheduled runs" only available on paid tiers?

No, the scheduling feature is available across all plans including Starter, Explorer, Pro, and Enterprise. You can schedule both sources and columns to run automatically on a daily, weekly, or monthly basis (hourly scheduling is Enterprise-only). Each plan has usage limits: Starter, Explorer, and Pro plans can have up to 100 scheduled sources and 100 tables with scheduled columns.

Sources: Build a sustainable growth engine with Scheduling - The GTM with Clay Blog Scheduled sources | Documentation | Clay University Scheduled columns | Documentation | Clay University

Scheduled runs are only available on paid plans (Starter, Explorer, Pro, and Enterprise). The free plan doesn't include this feature. Each paid plan allows up to 100 scheduled sources and 100 tables with scheduled columns.

Sources: Build a sustainable growth engine with Scheduling - The GTM with Clay Blog Scheduled columns | Documentation | Clay University Scheduled sources | Documentation | Clay University