QuillBot

Need to reword a clumsy paragraph, fix grammar, or shorten a long passage? QuillBot is an AI writing assistant that paraphrases text, checks grammar, summarizes, humanizes AI-written copy and runs an AI detector.

The free plan covers the basics: paraphrasing up to 125 words in 2 modes, basic grammar fixes, basic summaries, Basic mode humanizing, and AI detection on 1,200 words.

That is enough to try it on a short paragraph, though the 125-word cap will bite quickly on essays or reports.

Premium costs $8.33 per month when billed annually.

It removes the paraphrasing limit, adds unlimited modes, and brings Premium grammar recommendations, Advanced mode humanizing, custom summaries, unlimited AI detection and a check to prevent accidental plagiarism.

If you rewrite or edit text regularly, QuillBot's paid tier is where the tool becomes practical for longer documents.