Benchmark's warning lands at a moment when the venture industry is confronting a basic question: can the old rules of startup investing survive the AI era? For decades, many top firms in Silicon Valley observed an informal but powerful pact not to fund direct rivals within the same category, a practice meant to preserve trust with founders and avoid conflicts that could compromise boardroom loyalty. But as artificial intelligence reshapes the startup landscape, that norm is becoming harder to maintain.
Rivalry Under Pressure
The pressure is coming from the structure of the AI market itself. Frontier AI companies are capital-intensive, talent-constrained and moving at extraordinary speed. Unlike earlier software waves, where product differentiation could emerge over time, the current AI race is often defined by access to scarce compute, elite researchers and strategic distribution partnerships. That has made the cost of sitting out a promising company much higher for investors, while the risk of backing only one winner in a fast-evolving category has become more difficult to justify.
Benchmark's view is especially notable because the firm has long been associated with a disciplined partnership model and a strong emphasis on founder trust. Its concern suggests that even firms with deep reputational capital are finding it increasingly difficult to preserve a clean separation between portfolio companies that may appear to compete today but could diverge tomorrow. In AI, product lines can blur quickly: a model company may become an infrastructure provider, an application layer business may move into tooling, and a startup initially framed as a rival may later prove complementary.
The Venture Dilemma
For venture capitalists, the dilemma is not merely ethical; it is strategic. Backing multiple companies in the same arena can preserve optionality and improve access to the sector's best founders, but it can also dilute trust and create the perception that a firm is hedging rather than committing. In a market where founders often seek not just money but a long-term ally, that perception can matter as much as the check size.
The AI boom has intensified this trade-off because the category is still being defined. Investors are no longer choosing between clearly separated software niches. They are often making bets across model development, inference infrastructure, agentic systems, enterprise deployment and consumer-facing AI products, all of which can overlap in ways that were rare in previous technology cycles. That overlap makes the traditional "no rivals" rule less practical, even if the underlying principle remains attractive.
The result is a subtle but important shift in venture behavior. Firms are increasingly forced to decide whether the old norm is a moral commitment, a competitive advantage or simply a relic of a slower era. Benchmark's comments imply that the industry may be moving toward a more flexible interpretation of rivalry, one that recognizes that in AI, today's competitor may become tomorrow's partner, customer or acquisition target.
A New Investment Order
The broader implication is that AI may be changing not only what venture capital funds, but how it operates. The sector's speed and concentration of opportunity are compressing decision-making windows and raising the premium on being present early. That can encourage firms to tolerate more overlap in their portfolios, even if doing so would once have been considered taboo.
This does not mean the old venture pact has disappeared. Many investors still value exclusivity, and many founders still prefer a lead backer that will not simultaneously support a direct rival. But Benchmark's warning indicates that the norm is under real strain. As AI continues to attract outsized capital and define the next phase of technology investing, the industry may have to accept that its traditional rules were built for a different era.
For now, the message from one of Silicon Valley's most respected firms is clear: the AI race is not only testing technical limits, but also the unwritten code that has long governed venture capital behavior. In a market where the winners may be decided faster than ever, even the old taboo against backing rivals is becoming harder to keep.