The primary threat AI agents pose to platforms like DoorDash or Uber isn't that they can "vibe-code" a replacement app. It's that they can eliminate the friction of price shopping, thereby commoditizing the demand side of the marketplace and destroying the customer lock-in that constitutes the company's core value.

The threat to companies like DoorDash isn't a new AI delivery service. It's an AI agent that optimizes consumer choice between DoorDash, Uber Eats, and direct ordering. The brand that "owns the agent" wins by commoditizing the underlying service providers, even if their operations remain superior.

Companies like Uber and DoorDash build moats on customer lock-in. AI agents will eliminate this by automatically price-shopping for users, commoditizing demand. This shifts the competitive battleground to supply-side aggregation, lowering barriers to entry for new players.

AI agents shop based on optimized specs, not human heuristics like brand trust. This shift to "agentic commerce" could neutralize the power of major brands like Walmart and Amazon, and eliminate the interpersonal relationships that sustain local, small businesses.

AI agents pose a severe threat to platforms like Amazon and Resi by tirelessly finding ways to route around them. This 'maiming' won't kill the incumbents outright but will significantly damage their high-margin revenue streams like advertising and up-sells, impacting their stock prices.

AI agents can perform complex tasks like ordering food by interacting directly with restaurants and drivers, bypassing aggregator platforms like DoorDash. This disintermediation removes the "middleman tax," returning margin and power to the original creators, fulfilling the internet's early promise of direct, open access without powerful gatekeepers.

Businesses with moats based on network effects or consumer friction are vulnerable to "agentic commerce." AI agents, tasked with finding the absolute best price without experiencing the tedium of comparison shopping, will bypass brand loyalty and platform stickiness. This threatens any business model that relies on being the default or convenient choice.

Agents threaten ad-based models like Amazon's by removing human eyeballs from purchasing. This will force a shift toward new economic systems. For supply-constrained goods like restaurant reservations, this could lead to agent-driven bidding wars, reallocating power back to merchants.

Internet aggregators like Expedia and DoorDash built businesses by helping users navigate a complex web. AI agents can now perform that same search, comparison, and transaction function directly, disintermediating the aggregators and capturing their value.