As of January 2024, Andreessen-Horowitz — the venture capital firm half-named for Marc Andreessen — ranks in a clear first-place on the Sovereign Wealth Fund Institute’s list of venture capital firm assets under management.

Via Sovereign Wealth Fund Institute

Marc is best known for his work as an investor, but it’s worth mentioning that Marc Andreessen co-authored Mosaic (one of the internet’s first web browsers) and co-founded Netscape (which sold to AOL for $4.2 billion in 1998). He also co-founded Loudcloud/OpsWare, the first modern cloud computing provider (which sold to HP in 2007 for $1.6 billion).

This wealth of experience, success, and capital has provided Marc Andreessen with a unique perspective on technology and economics.

Over time, Andreessen’s ideas have become so impactful that the titles of his essays have each become a rallying cry amongst futurists.

Back when blogs reigned supreme on the internet, Marc Andreesen popularized the now-hallowed concept of product / market fit — a concept he describes as “the only thing that matters.”

Image by Jessica Hagy, via a16z

Product / market fit is one of the most useful ideas in modern entrepreneurship. It was originally invented by Andy Rachleff, but Andreessen is the one who really popularized the concept through his extensive blog posts.

Today, the a16z website is where you can find Marc Andreessen’s biggest ideas.

His 2011 essay “Software is Eating the World” accurately predicted that apps like Uber, AirBnb, and DoorDash would consume the majority of that generation’s market opportunities. It’s easy to forget that not too long ago, these companies were underdogs — and Andreessen was there rooting for them.

His more recent essays — the pandemic-fueled “It’s Time to Build” and then the aptly-named “Why AI Will Save the World” and “Techno-Optimist Manifesto” — reinforce similar themes and have compounded the investor’s influence as a leading innovator of new ideas.

Portrait of Marc Andreessen via a16z

The latter essay in particular indicates a new era of how Marc views technology and the broader economy. Marc has clearly become fascinated by the effective accelerationism movement, and as of January 2024 affiliates himself with “e/acc” in his X bio.

This mindset is being physically manifested through a project where — in collaboration with notable wealthy tech leaders including the investor Michael Moritz, Stripe co-founders John and Patrick Collison, LinkedIn founder Reid Hoffman, and Laurene Powell Jobs — Andreessen is backing an effort to build an entirely new city outside San Francisco. When was the last time America built a truly new city? That idea alone is worth celebrating.

Marc Andreessen’s innovation style evokes that of the legendary Stewart Brand: he’s more than consistently in the right place at the right time, he also makes tangible impacts on the direction of the moment.


  • Why Software is Eating the World (📖
  • It’s Time to Build (📖
  • Techno-Optimist Manifesto (📖
  • Moment of Zen interview with Marc (📺