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Comparison guide

AI writing tools compared

Drafting assistants, editors and long-form platforms. Compare free-plan limits, tone control, source grounding and where each tool genuinely helps.

CriterionGrammarlyNotion AIQuillBotDeepLKhanmigo
ProviderGrammarly (Superhuman)Notion LabsQuillBot (Learneo)DeepL SEKhan Academy
What it is forAn AI writing assistant that checks grammar, tone and clarity wherever you type and can rewrite or generate text on request.AI built into Notion's workspace for writing, searching, meeting notes and running multi-step agent tasks across your pages.A suite of writing tools for paraphrasing, summarising, grammar checking and AI detection, popular with students.An AI translator for text, documents and speech, with a writing assistant and a developer API.Khan Academy's AI tutor for learners and free AI teaching assistant for teachers.
Latest confirmed model—————
Main capabilities
  • Grammar and spelling correction
  • Tone view (Depends on plan)
  • Full-sentence rewrites (Depends on plan)
  • AI prompts (Depends on plan)
  • Plagiarism and AI-text detection (Depends on plan)
  • Enterprise security (Depends on plan)
  • Notion Agent (Depends on plan)
  • AI Meeting Notes (Depends on plan)
  • Enterprise Search (Preview)
  • Custom Agents (Depends on plan)
  • Notion AI trial (Limited)
  • Public API and webhooks
  • Paraphraser (Depends on plan)
  • Summarizer (Depends on plan)
  • AI Detector (Depends on plan)
  • Grammar checker
  • Team plans
  • Text and document translation (Depends on plan)
  • Glossaries (Depends on plan)
  • DeepL Write Pro (Depends on plan)
  • DeepL Voice (Depends on plan)
  • Translation memory (Depends on plan)
  • API
  • Teacher tools
  • Personal tutoring (Depends on plan)
  • Writing and debate coaching (Depends on plan)
  • Parent features (Depends on plan)
  • District features (Depends on plan)
Free planYes
100 AI prompts per month		Yes
5 MB per upload, 7-day page history, 10 guests		Yes
Paraphraser 125 words per input; Summarizer 1,200 words; AI Detector 1,200 words per scan, 6 scans/day		Yes
50,000 characters per user/month; 1 file translation/month (5 MB max); 1 glossary (5 entries per language pair)		Yes
Cheapest paid planPro: $30/mo
$12/mo billed annually
Per member. $30 monthly, $60 quarterly, $144 annually (shown as $12/month).		Plus: $12/mo
$10/mo billed annually
Per member		Premium: $19.95/mo
$8.33/mo billed annually
Annual $99.95 billed yearly; monthly figure from QuillBot FAQ; regional pricing applies		No monthly list priceLearners: $4/mo
$3.67/mo billed annually
$4/month or $44/year
API accessLimitedYes · docs (opens in a new tab)NoYes · docs (opens in a new tab)No
Learning curveBeginner-friendlyBeginner-friendlyBeginner-friendlyBeginner-friendlyBeginner-friendly
Last verifiedOct 19, 2026Oct 23, 2026Oct 19, 2026Oct 19, 2026Oct 19, 2026

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How to choose

  • Match the tool to the writing you actually do — long-form, marketing copy or editing.
  • Source grounding matters for factual work: does the tool cite what it claims?
  • Heavy AI-assisted text gets flagged by detectors — plan your disclosure.

Also in this group

Microsoft 365 Copilot

Microsoft's AI assistant inside Word, Excel, PowerPoint, Outlook and Teams, grounded in your organisation's work data.

Jasper

An AI platform for marketing teams that creates on-brand content using agents, workflows and a shared brand-knowledge layer.

Gamma

Generate presentations, documents, webpages and social posts from a prompt or outline.

The table shows up to five entries in the directory's editorial order, not a ranking. Every value links back to a record with sources and a last-verified date.