QuillBot
All-in-one writing suite with paraphraser, grammar checker, and plagiarism detector
Overview
QuillBot is primarily a paraphraser and grammar checker, but its Premium suite includes a plagiarism checker covering 100+ languages and comparing against billions of web pages. The limit is 25,000 words/month in Premium (~$8/month with annual billing). The plagiarism checker is not available on the free plan.
Native Chrome and Word integration makes it a handy companion for writers, lawyers, and HR teams who draft and check in the same workflow. It doesn't include dedicated AI content detection per se, it's a traditional plagiarism checker, not an AI detector.
Our verdict
QuillBot works well if you want a versatile suite for drafting and verifying originality without needing a dedicated AI detection tool. Don't confuse it with a real AI detector: it won't flag whether text came from ChatGPT. For SMEs, it matters mainly if you're already using the paraphraser or checker.