Surfer is the cheap pick. Replit AI is the one I'd pay for again.

I cared about how each one actually arrives at an answer. My call: reach for Replit AI when codes and deploys from the browser, and Surfer when tells you exactly what to include to rank. They cover different days, and pretending otherwise is how people end up paying for both and using neither.

What Replit AI does best: codes and deploys from the browser

What Surfer does best: tells you exactly what to include to rank

The catch on Replit AI: debugging through a tab is limiting And Surfer? it can make your writing robotic

One honest note: the reasoning I could actually trace is where Replit AI and Surfer both still want a human in the loop. I stopped expecting either to be fire-and-forget.