a16z Launches the Machine Age Fund: $1.1 Billion for AI's Physical Infrastructure

Andreessen Horowitz announced on August 28 its first fund dedicated exclusively to AI's physical layer: $1.1 billion for chips, memory, networking, storage, data centers and robotics. The name — Machine Age Fund — and the firm's rationale are equally blunt: AI infrastructure is "hitting a capacity wall."

A separate fund, not just another line item

The Machine Age Fund doesn't replace a16z's existing vehicles; it joins a family of funds that already exceeds $15 billion in capital raised, including the $1.7 billion Infrastructure Fund 2 with a broader mandate. It's the first time the firm has created a vehicle focused exclusively on the physical layer — semiconductors, memory, networking, storage, data centers, robotics and consumer AI devices — separate from its software and model bets.

The thesis: the entire supply chain is saturated

According to a16z, every link in the AI hardware chain is capacity-constrained — from chips to memory to power. It's not a bet on one specific component, but on the structural scarcity running through the entire physical stack needed to train and run inference at the scale current demand requires.