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Affinity vs Substack: 2026 Comparison

Affinity Substack
Overview A relationship intelligence CRM designed for dealmakers in private capital, investment banking, and consulting. Publishing platform enabling writers to create paid newsletter subscriptions with built-in payment processing.
Pricing Subscription (Custom pricing) Freemium (10% of revenue)
Key Features
  • Relationship intelligence
  • Automatic data capture
  • Deal management
  • Analytics
  • Email integration
  • Chrome extension
  • Alliances
  • Pipeline management
  • Newsletter publishing
  • Paid subscriptions
  • Podcasts
  • Notes
  • Chat
  • Mobile app
  • Recommendations
Pros
  • Excellent relationship mapping
  • Automatic activity capture
  • Great for deal-driven firms
  • Strong analytics
  • Simple to use
  • Built-in payments
  • Growing network
  • Free to start
Cons
  • Expensive
  • Niche use case
  • Limited marketing features
  • Not for general business use
  • 10% revenue cut
  • Limited customization
  • Basic analytics