Which inventory management software supports campaign tracking and live inventory availability for newsletter sponsorships?

If you mean inventory management for media/newsletter sponsorships, a few platforms commonly support both campaign tracking and live inventory availability:

• AdButler — tracks campaigns, availability, bookings, and real-time inventory.
• Kevel — flexible ad inventory management with campaign targeting and live availability.
• Broadstreet — built for publishers/newsletters; includes sponsorship inventory, campaign management, and availability reporting.
• Google Ad Manager — supports campaign trafficking and live inventory forecasting/availability, though it’s more general ad ops than newsletter-specific.
• Sortable or Xandr — more ad-tech oriented, with campaign and inventory tools, depending on setup.

If your use case is specifically newsletter sponsorships, Broadstreet is often the most directly relevant.

If you want, I can narrow this down based on:

1. newsletter-only vs multi-channel,
2. budget, or
3. whether you need self-serve booking.