QuillBot

QuillBot is an AI writing suite built around paraphrasing. It rewrites text in a range of modes, checks grammar and tone, summarises long documents, generates citations, translates, and checks for plagiarism and AI-generated text. It runs in the browser and through extensions for Chrome and Microsoft Word, so the paraphraser is available inside documents rather than as a separate destination. Its core audience is students, researchers and non-native English writers who need to restate existing text clearly rather than generate new text from nothing. The free plan covers paraphrasing at up to 125 words per pass, basic humanisation and a limited number of AI-detection checks. Premium, listed at $4.17 per month when billed annually, removes the word cap, opens the advanced rewriting modes, and adds unlimited AI-detection checks along with plagiarism prevention. A Team plan is available for organisations. The honest limitation worth stating plainly: no rewriting tool can guarantee its output will evade AI-detection systems, because those systems are continuously updated. Treat any tool that promises otherwise with suspicion, and read rewritten passages before submitting them — aggressive paraphrasing tends to flatten the specificity of the original. Browse related picks.