a16z

a16z is the Substack home of Andreessen Horowitz, the venture capital firm known for backing technology companies across stages. The publication functions as a direct channel for the firm’s partners and guests to publish essays, commentary, and analysis, with the stated theme “It’s time to build.” It sits within Substack’s subscription infrastructure, so reading and following happen through that platform.

The core offering is written content: long-form posts on technology, startups, markets, and the craft of company building, delivered to subscribers. Because it is hosted on Substack, readers can subscribe by email, receive new posts as they publish, and access the archive through the Substack interface. The page shows a subscriber base of over 279,000, indicating a broad audience.

This publication fits founders, operators, investors, and students of the tech industry who want perspective from a major venture firm rather than general news. It is also useful for people tracking how a16z frames emerging categories such as AI and infrastructure.

Practical advice: subscribe with an email you check regularly, since delivery is newsletter-based, and use Substack’s archive to browse past essays by topic. Expect firm-authored viewpoints rather than independent reporting, and treat posts as perspective to weigh alongside other sources.

In short, it is a convenient way to follow a16z’s public writing in one subscription feed.