a16z
September 10, 2025

Chris Dixon on How to Build Networks, Movements, and AI-Native Products

a16z partner Chris Dixon, a veteran of consumer investing and a two-time founder, breaks down the foundational forces that drive tech, explaining how to spot emerging movements and build defensible, AI-native products that last.

The Three Exponential Forces of Tech

  • Tech’s unique power comes from three compounding forces: Moore’s Law (hardware improvement), composability (open-source software as LEGO bricks), and network effects (value increases with users).
  • These forces are what allow startups to disrupt massive incumbents. The brilliance of Apple’s iPhone was riding the Moore’s Law curve; the genius of OpenAI was betting on the exponential improvement of neural networks when they were still toys.
  • Before focusing on tactics, founders and investors must first understand this landscape of forces and position themselves to ride the right wave.

AI's Journey: From Tools to Networks

  • The "come for the tool, stay for the network" strategy is a classic playbook for overcoming the network cold-start problem. Instagram first attracted users with free photo filters (the tool) before its social graph (the network) became its primary value.
  • Most current AI products are single-player tools that are useful but lack defensibility. Long-term engagement and a strong moat will likely require layering in a network, turning a faddish utility into an essential platform.
  • However, incumbent networks like Facebook and Twitter are now hypersensitive to this strategy and actively block new networks from bootstrapping on their platforms, making the playbook more challenging to execute today.

Finding the Future in Niche Movements

  • The next major tech paradigms often emerge from small, niche online communities of hardcore enthusiasts, like the early days of Bitcoin, VR, or 3D printing. These groups often have their own language, norms, and a sense of being insiders.
  • These movements act as a powerful engine for innovation and marketing. The members are often technical, build the first products, and have outsized influence in spreading the core ideas.
  • The key is to distinguish movements driven by exponential forces (like computing power for crypto) from those with only linear growth (like nootropics), as this determines their potential to create massive new markets.

Key Takeaways:

  • The playbook for building iconic tech companies remains the same: identify an exponential force, build a product that rides its curve, and cultivate a community that amplifies its value. In the age of AI, this means moving beyond simple tools and asking what new, native experiences are now possible.
  • 1. Ride the Wave, Don't Fight It. Exponential forces like Moore's Law and network effects will overwhelm any product tactic. Your first job is to identify the fundamental technological or social current you're riding.
  • 2. Build a Tool, Then a Network. Defensibility in consumer tech often comes from network effects, but you can’t start there. Solve a user’s problem in single-player mode first to build the critical mass needed for an unbeatable network.
  • 3. Explore the Fringe. The future is being prototyped in niche subreddits and hobbyist communities. To find the next big thing, look for small groups of hyper-enthusiastic people working on things that seem like toys today.

For further insights and detailed discussions, watch the full podcast: Link

This episode reveals how the foundational exponential forces of network effects, composability, and Moore's Law are shaping the AI landscape, offering a strategic framework for investors to distinguish between fleeting tools and defensible, long-term platforms.

The Foundational Forces Driving Tech Disruption

  • Moore's Law: This is the famous observation that semiconductor performance roughly doubles every 18-24 months. Dixon expands this concept to include compounding improvements in storage and networking, which enabled breakthroughs like the iPhone. Apple's genius was not just building a device for the present but riding this exponential curve into the future.
  • Composability: This force, best exemplified by open-source software, allows anyone to contribute to and build upon existing work, creating a compounding effect of collective intelligence. Dixon explains this is why Linux evolved from a hobby project into the world's dominant operating system—it harnesses global talent, not just a single company's employees.
  • Network Effects: This is the principle where a service becomes more valuable as more people use it. Dixon points to early internet protocols like email and later platforms like Facebook, which started small but rode network effects to global scale.

Dixon emphasizes that these forces are overwhelming and strategic alignment with them is more critical than any short-term product tactic. He notes, "Whether you're an investor or entrepreneur... these forces are going to overwhelm you for better or worse."

The "Come for the Tool, Stay for the Network" Playbook

  • Dixon cites Instagram as a classic example. It initially attracted users with free, high-quality photo filters—a standalone tool—while piggybacking on existing networks like Twitter for distribution. Only after reaching critical mass did its own internal network become the primary source of value.
  • This pattern is visible today with platforms like Substack, which began as a tool for writers using the email and Twitter networks, but is now building its own discovery network within the Substack app.
  • Strategic Implication: For AI investors, this is a critical lens. Many current AI products are powerful tools but lack a clear path to a defensible network. The key question is whether they can successfully transition from a useful utility to an indispensable, interconnected ecosystem.

Defensibility Beyond Traditional Network Effects

  • Externalized Network Effects: Dixon proposes that in today's mature internet, network effects can be "externalized." A product like Midjourney may not have strong in-app network effects, but it benefits from a massive surrounding ecosystem of YouTube tutorials, influencers, and community guides that create a powerful, albeit external, moat.
  • Brand and Capital: The rapid brand recognition of ChatGPT has become a significant defensive barrier. This, combined with the massive capital required to train cutting-edge models, creates a formidable moat where early success attracts the funding needed to maintain a lead.
  • High-End Niche Products: The host notes a trend of "narrow startups" charging high prices for exceptional value, suggesting that the future of consumer spending could be "food, rent, software." This model thrives on product excellence rather than network scale alone.

Investing in Movements and Niche Communities

  • Dixon shares his strategy for identifying future trends by observing niche, "hyperenthusiastic" online communities. He argues these groups are often where the future is being built before it becomes mainstream.
  • He describes these communities as often having their own language, norms, and a cultish "insider-outsider" dynamic. His early interest in Bitcoin, 3D printing (leading to an investment in Makerbot), and VR (Oculus) all stemmed from observing these passionate, developer-led movements.
  • "The future's already here it's just not evenly distributed." Dixon quotes, explaining that these communities are the unevenly distributed pockets where the next big thing is taking shape.
  • Actionable Insight: Researchers and investors should monitor niche subreddits, Discord servers, and developer forums. The key is to distinguish movements driven by exponential forces (like AI and crypto) from those with only linear potential, which may remain hobbies.

AI's Double-Edged Impact on the Open Web

  • Centralization: AI's ability to provide direct answers threatens the open web's model of clicking through to websites. This is already causing "alarming drops in SEO" for travel and content sites, potentially accelerating the internet's consolidation around a few major platforms.
  • Decentralization: Simultaneously, tools like Cursor and Replit empower individuals with "vibe coding," allowing more people to create software than ever before. This is fueling a renaissance in paid software, where "narrow startups" can build sustainable businesses without needing to achieve Facebook-level scale.
  • Dixon expresses hope that this trend will foster a healthier ecosystem of companies that are directly aligned with their users by charging for value, rather than relying on adversarial, ad-based models.

Navigating the AI "Idea Maze"

  • The Idea Maze: This mental model posits that a startup's success depends on both entering a promising field (the maze) and dynamically adapting its strategy as the landscape shifts.
  • Netflix is the canonical example: it entered the "internet-will-change-movie-distribution" maze. Its initial path was mailing DVDs, but it successfully pivoted to streaming and then again to original content as the maze evolved.
  • For AI, the "meta-process" of continuous, exponential improvement across the entire field is the maze. While specific techniques may hit diminishing returns, the overall industry flywheel is likely to keep scaling. The challenge for founders is navigating this dynamic environment where incumbent models could subsume their use cases.

From Skeuomorphic to Native AI

  • Skeuomorphism: This design term, popularized by Steve Jobs, refers to new interfaces that mimic their real-world counterparts (e.g., a digital bookshelf that looks like wood). Early internet sites were skeuomorphic, putting print catalogs online before native forms like YouTube emerged.
  • Dixon argues that much of current AI is skeuomorphic. For example, prompt-to-image generation automates the work of a human illustrator but doesn't fundamentally create a new medium.
  • The emergence of film from photography serves as a historical parallel. Photography was a skeuomorphic application of cameras (copying reality), but film became a new, native art form. The truly exciting future of AI may be a new medium that is currently hard to predict.

The Future of Open-Source AI

  • Dixon concludes by emphasizing the critical importance of open-source models for ensuring a competitive and democratic AI ecosystem.
  • He argues that open-source software has been a profoundly democratizing force, enabling the existence of startups and affordable internet access. A future dominated by a few closed-source AI providers would be a "bad outcome," allowing them to "charge rent to consumers and startups."
  • While the massive capital required for training models presents a challenge, there are optimistic signs: Meta's Llama models, China's focus on open source, and OpenAI releasing older models.
  • A likely and acceptable equilibrium may be that open-source models remain one or two generations behind the state-of-the-art, providing more than enough power for most startups and use cases while preserving a competitive market.

Conclusion

This discussion underscores that AI's evolution follows historical tech patterns driven by exponential forces. For investors and researchers, the key is to analyze how AI ventures are building defensible moats—whether through true network effects, externalized ecosystems, or deep domain expertise—in a rapidly changing, capital-intensive landscape.

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