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Acoustic vs Obsidian: 2026 Comparison

Acoustic Obsidian
Overview Former IBM Watson Marketing platform offering email, mobile, and cross-channel campaign management for enterprises. Personal knowledge management app using local Markdown files with linking, graph view, and extensive plugin system.
Pricing Subscription (Custom) Freemium ($0-50/mo)
Key Features
  • Email marketing
  • Mobile push
  • SMS
  • Campaign management
  • Personalization
  • Analytics
  • Journey builder
  • Markdown
  • Backlinks
  • Graph view
  • Plugins
  • Local files
  • Canvas
  • Templates
  • Sync
Pros
  • Enterprise features
  • Cross-channel
  • IBM heritage
  • Scalable
  • Local-first
  • Extensible plugins
  • Free for personal
  • Markdown based
Cons
  • Expensive
  • Complex
  • Transition from IBM
  • Steep learning curve
  • No real-time collaboration
  • Sync costs extra