Payment Processors Choose Sides in AI Commerce War: Stripe vs PayPal

As the AI commerce protocol war heats up, payment processors are quietly choosing sides. This isn’t neutral infrastructure—it’s a bet on which business model will dominate the agentic economy.

The Alignment

Payment Processor Aligned With Protocol
Stripe OpenAI Agentic Commerce Protocol (ACP), Shared Payment Token
PayPal Google + Perplexity Agent Payments Protocol (AP2), UCP ecosystem

What This Means

For merchants on Stripe: Lower barrier to ACP adoption. Enabling agentic payments through OpenAI’s protocol requires as little as one line of code.

For merchants optimized for Google Pay: Lower barrier to UCP adoption. Transactions flow naturally through Google’s commerce and measurement infrastructure.

The Lock-In Effect

Payment processor alignment creates downstream lock-in effects. Once a merchant commits to one payment infrastructure, switching costs accumulate:

  • Integration complexity
  • Transaction history and analytics
  • Customer payment preferences
  • Compliance and security certifications

Why It Matters

The payment layer is where business model assumptions get encoded. Stripe’s alignment with OpenAI supports transaction-fee economics. PayPal’s alignment with Google supports advertising-embedded commerce.

Whichever protocol wins the commerce layer will determine the monetization model for the entire agentic economy.

Read the full analysis: The AI Advertising Wars

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