andreessen horowitz a16z.com andreessen horowitz (a16z) is a venture capital firm in silicon valley, california, that backs bold entrepreneurs building the future through technology. Category:computers electronics and technology Global Rank:75,021 visits:894.3K pages/Per:2.1 pe-insider.com Category:investing Global Rank:2,865,316 visits:14.0K pages/Per:1.3 ADS