10K+
free subscribers

Proof of Concept

About the Substack

Proof of Concept is a digital publication about creativity and experimentation for designers, builders, and entrepreneurs.

Free Subscription Benefits

  • Weekly public posts and comment access

Paid Subcription Benefits

  • Full archive of posts
  • Quarterly subscriber-only posts

Paid Subscription Plans

  • $100 a year
  • $10 a month

About David Hoang

Investing and building tools that revolutionize the internet.

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