AI humanizers and AI-content detectors are locked in an arms race, and the results are rarely as reliable as the marketing suggests. In this category we test rewriting tools that try to make AI-generated text sound more natural, alongside detectors that claim to identify machine-written content. We compare rewrite quality, meaning retention, language support, false positives, false negatives, document handling, speed, and pricing. We also examine the ethical and practical limits: no detector is perfect, and no humanizer guarantees a particular result. These reviews help you understand what the tools can and cannot do before you rely on them for academic, editorial, or professional work.