If you're looking for a DupliChecker alternative, Paperpal is worth a look. This AI-powered academic writing assistant offers a range of features, including plagiarism detection with similarity scores, grammar checking as you write, and a paraphrasing tool that maintains a formal tone. It also can translate academic papers into high-quality writing in more than 25 languages and can be used directly in MS Word for editing.
Another option is Originality, geared for web publishers, content marketers and writers. It offers a range of tools, including an AI content detector, plagiarism checker, fact checker and readability checker. That should help you ensure you're producing high-quality, original content that will pass Google's quality tests. It also has tools for team management and for integrating with your own applications through an API, so it should be adaptable to your needs.
For a more general-purpose language checker and paraphrasing tool, check out LanguageTool. It works with more than 30 languages and offers grammar checking, tone suggestions and paraphrasing. LanguageTool can be used in a variety of writing tools and websites through plugins and standalone apps. That makes it a good choice for professional and academic writers.
Last, Trinka could be useful for academic and technical writing. It offers a powerful grammar checker, a plagiarism checker that uses a top-ranked algorithm, and a proofread file tool that applies tracked changes. Trinka also has a citation checker and a journal finder, so it's a good tool for keeping your writing quality and integrity in check.