Certaffy

Features

Everything Certaffy can do

AI-writing detection, Writing Coach diagnostics, evidence reports, and workspace tools — with honest limitations and human review first.

Live

AI Detector

Context-aware AI-writing detection with sentence highlights, score bands, and evidence reports for fair human review.

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Pro / Business

AI Paraphrase Risk

Separate paraphrase signal from raw AI probability — shown only when confidence is sufficient (Pro / Business).

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Live

Score Bands & Fairness

Green, amber, orange, and red bands with conservative thresholds, review zones, and published limitations.

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Pro / Business

Explanation Panel

Click a flagged passage for rule-based signals and revision tips (Pro / Business).

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Live

Upload Formats

PDF, DOCX, TXT, or paste. Identical scoring and highlights across every path.

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EducationPro

Originality Evidence Pack

Writing evolution report combining scan history, draft timeline, score deltas, and self-plagiarism overlap.

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Pro / Business

Authorship Evidence Report

PDF evidence of typed vs pasted history, paste timelines, and writing time — verification links optional (Pro / Business).

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EducationPro

Self-Plagiarism Check

Compare a submission against your own prior uploads with flagged overlapping passages.

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EducationLive

Citation Checker

APA/MLA format checks and CrossRef lookup for academic drafts — honest about what CrossRef cannot confirm.

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Pro / Business

Grammar & Spelling

Self-hosted LanguageTool underlines and apply-fix — spelling and grammar only (Pro / Business).

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Pro / Business

Writing Coach

Five rule-based checks: specificity, generic transitions, hedging & filler, stance, and topic sentences. Diagnoses only — never rewrites (Pro / Business).

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Institution / Enterprise

Batch Review

Queue classroom or content batches with per-file summaries and exports (Institution / Enterprise).

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Pro / Business

Shareable Reports

Read-only report links for stakeholders — revoke access anytime from the analysis report.

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WorkBusiness

Style Rules

Banned phrases, required disclaimers, and reading-grade limits on every Work scan (Business).

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WorkBusiness

URL Scanning

Fetch public pages and run the same detection pipeline as pasted Work content (Business).

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WorkBusiness

Compliance Reports

Branded PDF exports for audit trails on Work reviews (Business).

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EducationLive

Classrooms

Create a class, share a join code, see submissions from your students.

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WorkEnterprise

Organization & Teams

Seats, roles, and org-level controls for Work teams (Enterprise).

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Live

Account Security

Two-step verification, active sessions, and an account activity log.

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Live

Privacy & Deletion

Delete analyses anytime; documents never used for training without consent.

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Live · Free tool

Free AI Detector

3 score summaries/day up to 2,000 words — no account.

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Live · Free tool

Word Counter

Instant word, character, sentence and reading-time counts — free, no signup

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Live · Free tool

Free Tools Hub

Word counter, text stats, and the free AI detector — all in one place, no signup.

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Pro / Business

Dashboard & Scan History

Unlimited history & reopen reports on Pro (Free keeps 30 days).

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Live

Smart Guide

Rule-based in-app help for scores, plans, privacy, and features — answers from our guides, not a chatbot.

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Start free — no credit card required

Free account: 3 full highlighted reports, then 1 score-only scan/day up to 800 words. No account: 3 score summaries/day up to 2,000 words.