Best Plagiarism Checker Software

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Originality.ai is a powerful AI detection and content quality platform designed to help users verify whether text is human-written or AI-generated. It accurately detects content created by models such as GPT-5, ChatGPT, Claude, and Gemini. The platform combines AI detection with plagiarism checking, grammar analysis, readability scoring, and fact checking in one suite. Originality.ai is trusted by editors, publishers, students, and marketers to maintain transparency and integrity in written content. Its AI checker highlights sentences and explains why content may be flagged as AI. The platform is backed by third-party studies showing industry-leading accuracy across multiple LLMs. Originality.ai enables users to confidently publish or submit content knowing it meets originality standards.

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SEO Content Software for Pros: Improve Content Optimization. Make your content perfect for both people and search engines. Check content for SEO issues, get tips how to fix them, rewrite text and publish updated content. Make comprehensive SEO content analysis to identify problems that prevent your pages from higher ranking in SERP. Rewrite, replace, or delete content with low quality using our interactive writing tips in online editor. High-quality, unique, and well-polished SEO content boost not only your traffic, but also boost conversions. Increase your website’s rankings by fixing problems with plagiarism and keyword spamming. Grow conversion on landing pages by making your content understandable and easy to read. Improve your efficiency with the help of grammar checker, word counter and paraphrasing tool. Our SERP checker analyzes competitors' content and helps to find keywords that should be used on your website.