First search result in Google for me is "https://esta.visasyst.com/ https://esta.visasyst.com/", second one is "https://evisa.us/application/esta https://evisa.

First search result in Google for me is "https://esta.visasyst.com/ https://esta.visasyst.com/", second one is "https://evisa.us/application/esta https://evisa.us/application/esta", third one is "https://www.usimmigrationsupport.org/esta https://www.usimmigrationsupport.org/esta". First one on Kagi is the official US government ESTA website.