Paid
Writing
Copyleaks
Scan text for potential plagiarism and AI-generation signals, with credit-based plans, an API, and education integrations.
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QuillBot
Paraphrasing, grammar, and summarization tools popular with students and writers.
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Destination verification needs review (last checked October 25, 2026).
Starting price Free; Premium $8.33/month billed annually
Tool Information
Paraphrasing, grammar, and summarization tools popular with students and writers.
QuillBot is best treated as a revision tool for existing writing, not a substitute for understanding a source. Its paraphrase, grammar, and summary functions solve different problems.
Pricing review, September 26, 2026: Free; Premium $8.33/month billed annually. Check the official pricing page for current billing, limits, taxes, and regional availability.
Musthave review
QuillBot review
Test one paragraph with technical terms or a nuanced claim. Check whether the rewrite preserves meaning, attribution, and voice. Students should follow their institution’s rules on AI-assisted writing and citations. See the official product information for current features, access, and terms.
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