Phrasly.AI (phrasly.ai) is a US company founded in 2023 that offers a range of AI tools geared toward students and professional writers.[1] Its products include an AI detector, plagiarism checker, and AI humanizer that rephrases text generated by ChatGPT and other large language models (LLMs) to sound more human. In the review below, we focused primarily … Read more

Undetectable AI (undetectable.ai) is an AI detection and content rewriting platform that first released in early 2023. It’s best known for its humanizer, which modifies AI-generated text to sound more natural and less detectable by AI scanners. The company even offers refunds if content generated with its tool fails to bypass AI detection.[1] In addition … Read more

QuillBot (quillbot.com) is a writing assistant and AI detector that launched in 2017.[1] It initially offered only a paraphrasing tool, but now provides plagiarism and grammar checkers, a humanizer, and AI detectors for both text and images. While QuillBot is known as a powerful writing aid, we primarily tested its AI detector to see how well … Read more

Copyleaks (copyleaks.com) is a company founded in 2015 that initially focused on plagiarism detection.[1] Today, it offers a range of products, including AI detection tools geared towards businesses and educators. Pros Detected 7 of 8 AI-written texts. No false positives for human content. Cons Failed to detect AI in 6 of 8 humanized articles. Poor user … Read more