Which plagiarism detection tool is the most accurate? Any recommendations?

Are tools like Grammarly, Prepost SEO, SmallSEOTools, etc... reliable for plagiarism detection? I’ve heard about these tools, but I’m not sure how accurate they are when it comes to detecting plagiarism content. Are they good enough, or is there a better alternative out there? I’d appreciate any recommendations, especially if you’ve personally used them.