A16z's "big venture" model was based on two core ideas: first, that Marc Andreessen's "Software is Eating the World" thesis would create 10x more viable companies, and second, that founders required a superior VC "product" with platform services that only scale could provide.

A16z's foundational belief is that founders, not hired "professional CEOs," should lead their companies long-term. The firm is structured as a network of specialists to provide founders with the knowledge and connections they lack, enabling them to grow into the CEO role and succeed.

A16Z's transformation from a small, generalist partnership to a large, specialized firm was a deliberate answer to a fundamental industry problem: the traditional partner model doesn't scale for deploying capital and making decisions in today's massive, professionalized venture market.

To compete with established VCs who relied on historical reputation, a16z focused on creating a superior 'product' for entrepreneurs. They designed their firm to provide founders with the brand, power, and access needed to become successful CEOs, a departure from the traditional VC model.

Initially, a16z believed only former founder-CEOs could properly advise entrepreneurs. They later realized this was flawed. Many successful founders can't articulate how they succeeded and may not be interested in the investing skillset. The firm adjusted, realizing it's better to centralize operational advice (e.g., in books and specialist partners) rather than requiring it from every GP.

By defining the entrepreneur as the primary customer, a VC firm changes its entire operating model. This customer-centric view informs decisions on partner incentives (removing attribution), community building, and support services. The result is a powerful brand that attracts the best founders and generates high-fidelity deal flow through referrals.

The firm's long-term strategy, established from day one, is to compound reputation above all else. Their primary competitive moat is built on what entrepreneurs say about them compared to other VCs, a standard they apply to every interaction.

Unlike firms whose value is tied to a few key partners, Andreessen Horowitz is building an institution akin to Goldman Sachs. Their bet is that venture capital will evolve from small partnerships to large, institutional firms, making them better equipped to handle generational transitions and founder departures.

The firm's structure is a psychological tool. It gives founders access to an otherwise inaccessible network, creating small wins that build confidence. This prevents the 'vicious confidence spiral' caused by bad advice and slow progress, enabling faster, bolder decision-making.