Grammarly vs QuillBot

When to pick Grammarly

• You write across many apps and want grammar, tone, and clarity help everywhere — browser, desktop, mobile, Office, and Google Docs — from one assistant.
• You want a genuinely useful free tier: 100 AI prompts a month plus unlimited grammar and tone checks, no credit card required.
• You want extras beyond grammar: newer AI agents like Humanizer, AI Detector, and Citation Finder extend it well past proofreading.

When to pick QuillBot

• Paraphrasing and rewriting are your main need — QuillBot is a purpose-built paraphraser with multiple modes, plus a summarizer and translator.
• You want the lowest price: Premium is about $8.33/month on annual billing ($99.95/year), well under Grammarly Pro’s $12/month annual rate.
• You’re a student or writer who rewrites and polishes text often and can work within the free tier’s 125-word paraphrase cap.

Bottom line

Grammarly is the better all-around writing assistant — it works in-line almost everywhere you type and covers grammar, tone, rewrites, and a growing set of AI agents. QuillBot is the better value for paraphrasing specifically: about $8.33/month annually versus Grammarly’s $12/month, with a strong multi-mode rewriter. Neither offers a developer API, so both are for human writers rather than automation. Pick Grammarly for broad, everywhere-you-type writing help; pick QuillBot when paraphrasing and summarizing dominate your workflow and price is the deciding factor.