Your platform, plus the sponsor layer it's missing.
KeelStack is platform-agnostic on purpose. Pick where you publish and see exactly what it adds.
beehiiv
Newsletter platform with a native ad network
See how it fitsSubstack
Subscriptions-first publishing with no sponsor CRM
See how it fitsGhost
Self-hosted publishing, zero sponsorship workflow
See how it fitsKit (ConvertKit)
Email-first platform, no sponsor ops layer
See how it fitsMailchimp
Email marketing at scale, manuals for sponsor admin
See how it fitsPodcasters
Host-read ads with no operations layer
See how it fits