There are a few key reasons:
-Stripes technology is more advanced, allowing for things like customizations and integrations that Braintree cannot provide.
-Stripe is more user-friendly and provide a smoother checkout experience for customers.
-Stripe has better fraud protection and security features, which is increasingly important for online businesses.
Overall, Stripes superior technology, user-friendliness, and security make it the preferred choice for startups.