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Compare AI Tools

Pick two to five tools. Every cell comes from a verified record; anything unverified says so. There is no overall winner — the right choice depends on your task, budget and technical needs.

AI tools & apps AI models

Tool 1Tool 2Tool 3 (optional)Tool 4 (optional)Tool 5 (optional)

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Criterion	CheckWise AI	GPTZero	Originality.ai	QuillBot	Grammarly
Provider	CheckWise AI	—	—	QuillBot (Learneo)	Grammarly (Superhuman)
What it is for	An independent document-analysis service that runs an AI-writing check and a similarity (plagiarism) check on the same upload.	An AI detection service that estimates whether a piece of text was written by a person, by an AI model, or by a mix of both.	An AI content detector and plagiarism checker aimed at publishers, agencies, writers and educators.	A suite of writing tools for paraphrasing, summarising, grammar checking and AI detection, popular with students.	An AI writing assistant that checks grammar, tone and clarity wherever you type and can rewrite or generate text on request.
Latest confirmed model	—	—	—	—	—
Main capabilities	AI content analysis Similarity (plagiarism) check File upload or pasted text Downloadable reports Automatic data purge	AI Detector that highlights passages it suspects are AI-generated and gives an overall estimate Classifies text as human, mixed or AI, with sentence-level highlights (via the API) Plagiarism Check and Advanced Scan on paid plans Writing Replay / authorship tool that shows how a document was written, including copy-and-paste activity Chrome extension and Google Docs add-on, plus integrations listed for Google Classroom, Canvas and Zapier	AI Checker with sentence highlights and shareable/PDF reports Plagiarism Checker and bulk scanning Fact and AI hallucination checker Readability and grammar/spelling checkers Chrome extension that scans in Google Docs and can replay the writing process	Paraphraser (Depends on plan) Summarizer (Depends on plan) AI Detector (Depends on plan) Grammar checker Team plans	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)
Free plan	No	Yes	Yes	Yes Paraphraser 125 words per input; Summarizer 1,200 words; AI Detector 1,200 words per scan, 6 scans/day	Yes 100 AI prompts per month
Cheapest paid plan	No monthly list price	Pricing not verified	Pricing not verified	Premium: $19.95/mo $8.33/mo billed annually Annual $99.95 billed yearly; monthly figure from QuillBot FAQ; regional pricing applies	Pro: $30/mo $12/mo billed annually Per member. $30 monthly, $60 quarterly, $144 annually (shown as $12/month).
API access	No	Yes	Yes	No	Limited
Learning curve	Beginner-friendly	—	—	Beginner-friendly	Beginner-friendly
Last verified	Oct 19, 2026	Oct 13, 2026	Oct 13, 2026	Oct 19, 2026	Oct 19, 2026

How to choose

Start from the rows that matter for your job: a free plan and learning curve for casual use; API access, rates and data terms for building products; context window and modalities for long documents or images. Provider claims are labelled as such; we do not rank.

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