Grammarly vs QuillBot (2026): Which AI Tool Is Better?

Both are popular AI writing assistants. Here is how Grammarly and QuillBot stack up on price, strengths and weaknesses, and which one we would pick.

Grammarly

Writing assistant for grammar, tone and rewrites across 1 million+ apps

8.1 /10

Pricing: Free plan, paid from $30/mo

Pros

Works inside Google Docs, Word, Gmail, Outlook, Slack and 1 million+ apps and sites
Free grammar and spelling checks plus 100 AI prompts a month
Pro adds plagiarism and AI-text detection, AI Grader and rewrites
Real-time support in 20+ languages

Cons

Pro costs $30 monthly; the $12 price needs annual billing
Free plan is mostly grammar and spelling
Includes an AI Humanizer, which some schools and clients treat with suspicion
Now part of Superhuman; enterprise sales go through Superhuman Go

Visit Grammarly ↗

QuillBot

Paraphraser, summarizer and grammar checker with a free tier

7.3 /10

Pricing: Free plan, paid from $19.95/mo

Pros

Free paraphraser, summarizer and grammar checker
Citation generator and AI detector are free
Annual Premium works out to $8.33/month
Subscriptions can be paused

Cons

Free paraphraser is capped at 125 words and 2 modes
Monthly Premium ($19.95) is poor value compared with annual
Rewording tools, not a drafting assistant for original content
Does not disclose its AI models

Visit QuillBot ↗

Grammarly vs QuillBot at a glance

	Grammarly	QuillBot
Editor score	8.1 / 10	7.3 / 10
Pricing model	Freemium	Freemium
Starting price	$30/mo	$19.95/mo
Reader upvotes	0	0
Best for	grammar, editing, tone	paraphrasing, summarizer, grammar
Model choice	No	No
Commercial use	No	No
No watermark (free)	No	No
API	No	No
Official MCP server	No	No
MCP client	No	No
Agent Skills	No	No
Brand kit	No	No
Teams	Yes	No
Content Credentials	No	No
Mobile app	No	No
20+ languages	Yes	No
Makes	Emails & newsletters, Blog posts & articles, Ad & marketing copy, Social media posts	Blog posts & articles, Emails & newsletters, Ad & marketing copy
AI models inside	0	0

Our pick

Grammarly edges it with a score of 8.1 versus 7.3. Grammarly is the better fit if you value: works inside google docs, word, gmail, outlook, slack and 1 million+ apps and sites, free grammar and spelling checks plus 100 ai prompts a month. Choose QuillBot instead if you need: free paraphraser, summarizer and grammar checker, citation generator and ai detector are free.