I made aidetectors.io because I was constantly testing AI-generated content across different tools, and none of them quite did everything I needed in one place:
fast, clean UI with no ads or clutter
side-by-side comparison of multiple detectors on one page
automatic formatting for pasted text so I don’t have to clean it up
support for both short and long-form content
summary view to quickly see which tools flagged it as AI
Ours is slow, but accurate, even for complex topics. The rest are fast, but generally can't handle complex topics. (There's more nuanced explanations in other comments)