Gemini on Question 28, Sep 18

Forced to pick just one, the winner is Stripe.

Here is why Stripe takes the crown for the vast majority of businesses:

1. Accessibility and Ease of Use
You can create a Stripe account and start accepting payments in minutes. Adyen, on the other hand, is notorious for its rigorous, lengthy onboarding process and typically ignores businesses that don't process massive transaction volumes (often requiring millions in revenue just to get an account).

2. The Developer Experience
Stripe is the undisputed gold standard for developer tools. Their APIs, documentation, and testing environments are universally loved by software engineers. Integrating Stripe is fast and intuitive, which drastically reduces development costs and time-to-market.

3. The Ecosystem
Stripe isn't just a payment processor; it’s a full financial operating system. Products like Stripe Connect (for marketplaces), Stripe Billing (for subscriptions), Stripe Radar (for fraud), and Stripe Atlas (for company formation) make it incredibly easy for a business to scale all of its financial infrastructure in one place.

4. Scalability
While Stripe is famous for helping startups, it has scaled to handle massive enterprises like Amazon, Shopify, and Salesforce. It grows with you seamlessly from $1 to $1 billion in revenue.

The Caveat: When would Adyen win?
If you are a massive, global enterprise (like Spotify, Uber, or McDonald's) that requires deep omnichannel payments (blending global online payments with physical, in-store Point-of-Sale hardware) and you want Interchange++ pricing to shave fractions of a penny off millions of transactions, Adyen is the better choice.

However, because Stripe serves 99% of the business world—from a solo developer in a garage to massive tech giants—while Adyen only caters to the top 1%, Stripe is the better overall platform.