John Jantsch

Last updated October 31, 2026

John Jantsch is an American marketing consultant and podcaster who created Duct Tape Marketing, a system for small businesses. He hosts the Duct Tape Marketing Podcast and wrote Duct Tape Marketing, The Referral Engine and The Commitment Engine.

Books written by John Jantsch

• The Referral Engine: Teaching Your Business to Market Itself
• Duct Tape Marketing: The World's Most Practical Small Business Marketing Guide