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Affinity vs Plunk: 2026 Comparison

Affinity Plunk
Overview A relationship intelligence CRM designed for dealmakers in private capital, investment banking, and consulting. Open-source email platform combining transactional emails and marketing campaigns with a developer-friendly approach.
Pricing Subscription (Custom pricing) Freemium ($0-custom/mo)
Key Features
  • Relationship intelligence
  • Automatic data capture
  • Deal management
  • Analytics
  • Email integration
  • Chrome extension
  • Alliances
  • Pipeline management
  • Transactional email
  • Marketing email
  • Open-source
  • API
  • Automation
  • Analytics
  • Contacts
Pros
  • Excellent relationship mapping
  • Automatic activity capture
  • Great for deal-driven firms
  • Strong analytics
  • Open-source
  • Developer friendly
  • Transactional + marketing
  • Free self-hosted
Cons
  • Expensive
  • Niche use case
  • Limited marketing features
  • Not for general business use
  • Very new
  • Limited features
  • Small community