Best Turnitin Alternatives (2026): 7 Checkers Compared

GPTZero is the most direct replacement for Turnitin's AI indicator, and anyone can sign up. The free plan scans 10,000 words a month. Premium, at $23.99 a month or $155.88 a year, adds a plagiarism checker, downloadable reports and 300,000 words. Teachers get writing replay in Google Docs, and the Professional plan adds Canvas and Google Classroom integration. In the October 2025 University of Chicago study it was careful with human writing but missed about half or more of humanized AI text. It ranks #2 in our best AI detectors. Compare them in GPTZero vs Turnitin.

Pangram is the AI detector with the strongest independent record. It led the October 2025 University of Chicago study, with near-zero false positives and false negatives on medium and long passages, and it ranks #1 in our best AI detectors and our AI detectors for teachers rankings. The free plan scans 2,000 words a day and works in over 20 languages. The Individual plan costs $20 a month ($180 billed yearly) for 300,000 words, with plagiarism detection on every scan. Institutional licences with LMS integration are quoted. It is newer and less embedded in schools than Turnitin.

iThenticate is Turnitin's own checker for researchers, and unlike Turnitin, individuals can buy it. $125 covers one manuscript up to 25,000 words, and $300 covers up to three or one long document up to 75,000 words, each with five free revisions over 12 months. It checks against paywalled scholarly content that free web checkers cannot see, and many journals use the same engine to screen submissions. It ranks #2 in our best plagiarism checkers. The catches: individual credits do not include AI detection, and the price is steep for short essays.

Scribbr is the plagiarism checker we recommend for students who want one reliable check before a deadline. It compares your document with about 99 billion web pages and 8 million publications from publishers such as Springer and Elsevier, and it says submissions are never added to its database, so your final Turnitin submission will not match your own draft. A free check tells you whether matches exist; a full report costs $19.95 up to 7,499 words, $29.95 up to 49,999 and $39.95 above that. It ranks #3 in our plagiarism ranking. It cannot see private university paper archives.

Originality.ai runs plagiarism and AI detection in one scan, which suits people who commission or publish writing. Pro costs $14.95 a month or $12.95 billed yearly for 2,000 credits, where one credit covers 100 words of one check type, and extra team seats cost $9.95 a month. The free tier gives three AI scans a day of up to 2,000 words. Its AI detector landed in the second tier of the 2025 University of Chicago study, and it ranks #3 in our best AI detectors. Its plagiarism database is web-focused, so it is a poor fit for academic papers.

Copyleaks covers more kinds of copying than most rivals: text, cross-language plagiarism, source code, and AI text and image detection, with plug-ins for Canvas, Moodle and other learning platforms. The Personal plan costs $16.99 a month or $13.99 billed yearly for 100 credits a month, about 25,000 words, since one credit covers up to 250 words. Pro costs $99.99 a month or $74.99 billed yearly, and education plans are quoted. It finished mid-table in the only multi-tool comparison that included it, which was run by a competitor, so accuracy evidence is weaker than its feature list.

Grammarly's checker is the most convenient option if you already write with Grammarly. The free plan shows whether your text matches anything and includes a free AI detector; Pro, at $12 a month billed yearly or $30 month to month, adds the full report with sources. Grammarly says it does not sell or share checked documents. The trade-off is accuracy: a 2025 peer-reviewed study found it caught little plagiarism even in untranslated English papers, and it sits #7 in our best plagiarism checkers. Use it as a sanity check, not a final one.