2026-10-16
100 Product Managers Who Changed the World · #31: Marc Andreessen
Co-creator of Mosaic, co-founder of Netscape, and co-founder of Andreessen Horowitz (a16z). In 1993, at age 22, he added the `<img>` tag to HTML in an Illinois university basement and gave the text-only internet a graphical face; his 1995 Netscape IPO ignited the dot-com era and left behind JavaScript, SSL (HTTPS), Cookies, and open-source Mozilla; in 2011 he penned the Silicon Valley manifesto 'Why Software Is Eating the World.' Ranked #31 among the 100 PMs who changed the world, with an overall score of 90.30 (displayed as 90) — originality 96, vision 95, scale 92, insight 85, business 85, taste 82.
