Mark Jeffrey

Mark Jeffrey

Mark Jeffrey is an accomplished CTO/CPO/CEO with 25 years of experience and three exits. He is an award-winning serial entrepreneur of innovative technology companies backed by Tier One investors. These include The Palace (sold to in 1998), ZeroDegrees (sold to InterActive Corp/IAC in 2004), TargetCloseMahalo (now, ThisWeekIn, and Guardian Circle.  He has authored eight books, including the Max Quick series (Harper Collins). 

Mark consults as CTO / CPO for hire to a portfolio of companies in e-commerce, mobile, digital media, social, crypto-currency and digital publishing.

Most recently, Mark built a massively scalable e-commerce multi-variant testing platform used by AARP, Tile, Zillow, Nestle, Time-Life and others.  This included a radical new kind of A/B testable cart in a fully PCI-compliant environment.

He also created Guardian Circle, a personal safety network app variously characterized as 'mobile messaging for emergencies' or 'peer-to-peer protection'.  By providing a real time intelligence grid of where trusted help is, Guardian Circle provides flash coordination of resources to render assistance.  

Mark was the founding CTO of (now, a human-powered search and learning site, backed by Sequoia Capital (Google, Youtube, Yahoo), CBS, Newscorp, and Elon Musk (Paypal, Tesla, SpaceX). He also co-founded and served as founding CEO of the web television network ThisWeekIn with Jason Calacanis and Kevin Pollak.

Mark was Co-Founder and VP Product & Technology for the early business social networking company, ZeroDegrees. 

Founded in 2002, Mark sold the company to Barry Diller’s IAC/InteractiveCorp in 2004, with more than one million registered users.

Mark also consulted for several years with Travis Kalanick (now CEO of Uber) on his first company, Red Swoosh (sold to Akamai 2007).

By Mark Jeffrey
By Mark Jeffrey

Mark’s first company, The Palace, was backed by Time Warner, Intel and Softbank, and sold to in 1998. The Palace was a popular avatar virtual world environment that grew to 10 million users at its peak. The Palace was selected ‘The Best of 1996' by Entertainment Weekly, and received numerous awards and coverage including: a Webby Award nomination; “Cool Innovation of the Year” nomination; and was selected as the Chicago SUN-Times’ Best Website in 1998.

Mark has been named one of '50 to Watch' by Variety magazine, a 'Hero of Multimedia' by Entertainment Weekly and presented at the very first Harvard Conference on The Internet and Society in 1996. 

Mark is the author of six books of fiction, published both traditionally and as an audiobook podcast.  His first novel, MAX QUICK: THE POCKET AND THE PENDANT is published by HarperCollins.  Mark was one of the first three people ever to podcast a novel: MAX QUICK originally received over 2.5 million downloads in 2005.

Mark is also the author of BITCOIN EXPLAINED SIMPLY (2013) and THE CASE FOR BITCOIN (2016). 

Mark continues to consult and to increase his portfolio of technology ventures and his fiction publications.  He can be reached at mark dot jeffrey at gmail dot com.