Monetization infrastructure for the creator economy
Sponsor CRM for solo newsletter and podcast creators
Stage
Not given
Startup
Founded
2022
2026
Based in
Not given
Not given
Pricing model
Free
Paid
Pricing
Not given
Starter: $39/mo (monthly) or $33/mo billed annually ($390/year with 2 months free). Pro: $59/mo (monthly) or $49/mo billed annually ($590/year with 2 months free). Business: $99/mo (monthly) or $83/mo billed annually ($990/year with 2 months free). All plans include a 14-day free trial with no credi
Key features
Secure content sharing
Subscriptions and memberships
Digital content sales in posts and messages
Fan engagement features
Content discovery
Sponsor pipeline Kanban board with deal stages from Pitched to Churned
Magic-link sponsor portal with no account or password required
Automated renewal reminders at 30, 14, and 7 days before renewal
Invoice tracking with auto-numbered records and payment status
One-page branded, print-ready performance reports
Revenue dashboard with MRR, renewal rate, deal size, and quarterly trends
Platform-agnostic integration with Substack, Ghost, Kit, Beehiiv, and any podcast host
Read-only REST API included with Business plan
Custom reminder cadence and report branding on Pro and Business plans
What makes it different
All-in-one suite to maximize creator earnings
Advanced tools built for modern creators
Fan engagement features that actually work
Magic-link portal eliminates sponsor account creation and email friction
One saved renewal pays for 8.5–51 months of KeelStack service
Cenntre
KeelStack