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Grammarly AI vs Turnitin Report

Bottom line

Grammarly AI has a free plan plus paid upgrades, while Turnitin Report is paid.

Which one should you try?

Grammarly AI

Freemium

Best for Proofreading written content

Visit Grammarly AI See full review

Turnitin Report

Paid

Best for Students and educators

Visit Turnitin Report See full review

Pricing, capabilities and platforms side by side. Prices are as of the "Pricing checked" date in the table.

Grammarly AI

Grammarly AI

Grammarly sits in your browser and writing apps, flagging mistakes as you type—grammar, spelling, tone, clarity. It's useful if you write emails, documents, or social posts and want a second pair of eyes without leaving your workflow. The free tier covers basics; Premium ($12/month) adds tone detection and advanced rewrites. The catch: the free version is genuinely limited, and Premium's AI-powered suggestions sometimes miss context or feel prescriptive. It works best for high-stakes writing where accuracy matters more than speed.

Turnitin Report

Turnitin Report

Paste your essay and the tool returns an overall AI-likeness score plus paragraph-level notes flagging sections that read as generic, repetitive, or mechanically structured. No account required. The report-style output goes further than a raw percentage — it names the specific signal types driving the score, so you know whether the problem is sentence rhythm, transition overuse, or missing specific evidence. The ceiling hits fast: there is no API, no batch processing, and no way to integrate this into an LMS or writing workflow. For a student running a single draft before submission, that is fine. For an instructor processing thirty papers, it is a bottleneck.

AttributeGrammarly AITurnitin Report
PricingFreemiumPaid
PricePro $12/mo billed annually ($144/yr) or $30 month to month$3.59/mo
Pricing checkedOct 19, 2026Oct 22, 2026
Free trialNot statedNot stated
Open sourceNoNo
Has APIYesNo
Self-hosted optionNoNo
PlatformsWindows, Mac, browser extensions (Chrome, Safari, Firefox, Edge), Microsoft Office, Google Docs, iPhone, iPad, AndroidWeb
Languages95+ languages—
Released2009—
Pros
  • Real-time feedback
  • Grammar and spelling corrections
  • Integrated with popular platforms
  • No account required to run a check, so there is no friction between finishing a draft and getting a read on it — which matters when submission is twenty minutes away.
  • Paragraph-level signal notes rather than a single percentage, so you can target the three paragraphs that are pulling your score up instead of rewriting an entire essay blind.
  • Six named signal categories (sentence flow, transition overuse, generic language, etc.) give you a concrete rewrite checklist rather than leaving you to guess what 'AI-like' means in practice.
  • Essay-focused scope — the tool is built for academic formats like research papers, discussion posts, and case studies, so the signal interpretation is calibrated for that register rather than generic text.
Cons
  • Limited free tier accounts
  • Subscription required for advanced features
  • No batch processing: every document requires a manual paste-and-submit cycle. An instructor reviewing a class set of thirty assignments cannot run these in parallel or queue them — the tool is a one-at-a-time interface, full stop. Teams with volume needs move to API-accessible detectors or institutional Turnitin licenses that handle uploads at scale.
  • No API and no integration path, which means this tool sits outside every LMS, writing platform, or editorial workflow. Any team that needs detection embedded in a submission pipeline — rather than as a manual side step — has to abandon this and look at tools that expose an endpoint.
  • The vendor is explicit that the score is an estimate and 'not a final judgment.' That framing is accurate, but it means the output cannot be used as authoritative evidence in academic integrity decisions. Institutions that need defensible, documented detection results with known false-positive rates need a different tool — typically a platform-level Turnitin subscription, not this free checker.

Made up your mind?

Grammarly AI

Freemium

Best for Proofreading written content

Visit Grammarly AI See full review

Turnitin Report

Paid

Best for Students and educators

Visit Turnitin Report See full review

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Specs come from each tool's own site and docs (how we test). AIDiveForge is editorially independent.

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