Best Free Turnitin Alternatives
22 alternatives to Turnitin with a free plan or free tier, ranked by how closely they match. The percentage is a match score, not a popularity score.
Replacing: Turnitin — Turnitin is an academic integrity suite that schools, universities, and research organizatInput: text, documents · Output: data
1
Scribbr Plagiarism Checker compares a document with a database of 99 billion web pages and 8 million publications and shows where the text matches existing sources.
Input: text, documents · Output: documents
Free plan
88%Strong alternative · same core category as Turnitin
00
How the score adds up
- Same core category55/55
- Covers Turnitin's goals25/25
- Feature description similarity8/20
Shared goals 2 of the 2 we tag Turnitin for
Plagiarism CheckingAI Detection
Also tagged for
Grammar Checking
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
2
Used by over 10 million teachers and students across more than 100 countries, GPTZero detects AI-generated text across major language models while providing a suite of writing verification tools
Input: text, documents · Output: text, data
Free planFrom $12.99/moAPIBrowser extensionTeams
68%Partial replacement — covers the main need with gaps
00
How the score adds up
- Each lists the other's core category39/55
- Covers Turnitin's goals19/25
- Feature description similarity11/20
Shared goals 2 of the 2 we tag Turnitin for
Plagiarism CheckingAI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
3
Developers get API access for building AI detection into their own apps
Input: text, documents, web pages · Output: text, data
Free planFrom $12.95/mo
64%Partial replacement — covers the main need with gaps
00
How the score adds up
- Each lists the other's core category39/55
- Covers Turnitin's goals19/25
- Feature description similarity7/20
Shared goals 2 of the 2 we tag Turnitin for
Plagiarism CheckingAI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
4
Winston AI is an AI content detector and plagiarism checker built for education, SEO, and writing.
Input: text, images, documents · Output: data
Free planFrom $10/moAPITeams
71%Partial replacement — covers the main need with gaps
00
How the score adds up
- Each lists the other's core category39/55
- Covers Turnitin's goals19/25
- Feature description similarity14/20
Shared goals 2 of the 2 we tag Turnitin for
Plagiarism CheckingAI Detection
Also tagged for
Fake Image Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
5
ZeroGPT Plus can detect if text came from AI with high accuracy
Input: text, documents · Output: text
Free planFrom $9.9/mo
64%Partial replacement — covers the main need with gaps
00
How the score adds up
- Each lists the other's core category39/55
- Covers Turnitin's goals19/25
- Feature description similarity7/20
Shared goals 2 of the 2 we tag Turnitin for
Plagiarism CheckingAI Detection
Also tagged for
Humanizing Text
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
6
Pangram Labs makes an AI detector that checks whether text was written by a person or generated by a language model.
Input: text, images, documents · Output: data
Free planFrom $20/moAPIBrowser extension
68%Partial replacement — covers the main need with gaps
00
How the score adds up
- Each lists the other's core category39/55
- Covers Turnitin's goals19/25
- Feature description similarity11/20
Shared goals 2 of the 2 we tag Turnitin for
Plagiarism CheckingAI Detection
Also tagged for
Fake Image Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
7
Dechecker AI breaks down AI detection differently
Input: text, documents · Output: text
Free planFrom $5/mo
60%Partial replacement — covers the main need with gaps
00
How the score adds up
- Each lists the other's core category39/55
- Covers Turnitin's goals19/25
- Feature description similarity3/20
Shared goals 2 of the 2 we tag Turnitin for
Plagiarism CheckingAI Detection
Also tagged for
Humanizing Text
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
8
Scribbr AI Detector is a free checker that estimates whether a piece of writing was produced by an AI model.
Input: text · Output: data
Free plan
63%Partial replacement — covers the main need with gaps
00
How the score adds up
- Each lists the other's core category39/55
- Covers Turnitin's goals19/25
- Feature description similarity6/20
Shared goals 2 of the 2 we tag Turnitin for
Plagiarism CheckingAI Detection
Also tagged for
Humanizing Text
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
9
Rephrase until it sounds right
Input: text, images, documents · Output: text, images, documents, slides
Free planFrom $19.95/mo
53%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Turnitin's goals19/25
- Feature description similarity4/20
Shared goals 2 of the 2 we tag Turnitin for
Plagiarism CheckingAI Detection
Also tagged for
Grammar CheckingRewritingSummarizingWritingHumanizing Text
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
10
Trinka is an AI writing assistant and grammar checker aimed at academic and technical writing.
Input: text, documents · Output: text, documents
Free planTeams
60%Partial replacement — covers the main need with gaps
00
How the score adds up
- One lists the other's core category30/55
- Covers Turnitin's goals19/25
- Feature description similarity11/20
Shared goals 2 of the 2 we tag Turnitin for
Plagiarism CheckingAI Detection
Also tagged for
Grammar CheckingRewritingWriting
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
11
53%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Turnitin's goals19/25
- Feature description similarity4/20
Shared goals 2 of the 2 we tag Turnitin for
Plagiarism CheckingAI Detection
Also tagged for
Essay WritingGrammar CheckingRewritingWritingHumanizing Text
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
12
Writing confidence that follows you everywhere
Input: text · Output: text
Free planFrom $12/mo
51%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Turnitin's goals19/25
- Feature description similarity2/20
Shared goals 2 of the 2 we tag Turnitin for
Plagiarism CheckingAI Detection
Also tagged for
Grammar CheckingRewritingWritingHumanizing Text
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
13
A content marketer drafts 15 blog posts using AI, then realizes every piece sounds robotic and formulaic
Input: text · Output: text
Free planFrom $7.99/mo
51%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Turnitin's goals19/25
- Feature description similarity2/20
Shared goals 2 of the 2 we tag Turnitin for
Plagiarism CheckingAI Detection
Also tagged for
Humanizing Text
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
14
StudyPro gives you 500 free credits daily
Input: text, documents · Output: text
Free planFrom $6/mo
57%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Turnitin's goals19/25
- Feature description similarity8/20
Shared goals 2 of the 2 we tag Turnitin for
Plagiarism CheckingAI Detection
Also tagged for
Essay WritingGrammar CheckingRewritingWritingHumanizing Text
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
15
Detect.ai combines an AI content detector with a humanizer in a single browser tool.
Input: text, documents · Output: text
Free planFrom $15.99/moMobile app
44%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Turnitin's goals10/25
- Feature description similarity4/20
Shared goals 1 of the 2 we tag Turnitin for
AI Detection
Also tagged for
Humanizing Text
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
16
WriterZen costs nothing for 15 days
Input: text · Output: text, data
Free planFrom $135/mo
44%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Turnitin's goals10/25
- Feature description similarity4/20
Shared goals 1 of the 2 we tag Turnitin for
Plagiarism Checking
Also tagged for
SEO WritingSEO
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
17
The free plan hands you 5,000 characters per check
Input: text, documents · Output: text
Free planFrom $7/mo
42%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Turnitin's goals10/25
- Feature description similarity3/20
Shared goals 1 of the 2 we tag Turnitin for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
18
42%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Turnitin's goals10/25
- Feature description similarity3/20
Shared goals 1 of the 2 we tag Turnitin for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
19
Job applications get filtered by AI detection systems now
Input: text, documents · Output: text
Free plan
42%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Turnitin's goals10/25
- Feature description similarity2/20
Shared goals 1 of the 2 we tag Turnitin for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
20
OmniDetect is an AI content detector that focuses on what to fix before you submit a piece of writing.
Input: text, documents, web pages · Output: text, data
Free planFrom $9.99/mo
42%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Turnitin's goals10/25
- Feature description similarity3/20
Shared goals 1 of the 2 we tag Turnitin for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
21
isFake.ai is a tool designed for detecting AI-generated content across different media types, including text, images, audio, and videos. It employs proprietary algorithms to analyze for characteristic
Input: text, images, audio, video · Output: data
Free planFrom $3.99/mo
45%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Turnitin's goals10/25
- Feature description similarity5/20
Shared goals 1 of the 2 we tag Turnitin for
AI Detection
Also tagged for
Fake Image Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
22
Sapling AI Detector scores pasted text or uploaded PDF and Word files for the probability that a model wrote it.
Input: text, documents · Output: data
Free planFrom $12/moAPIBrowser extensionTeams
45%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Turnitin's goals10/25
- Feature description similarity6/20
Shared goals 1 of the 2 we tag Turnitin for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
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At a glance: top Turnitin alternatives
| Tool | Match | Input | Output | Pricing | Free plan | Rating | Category |
|---|---|---|---|---|---|---|---|
| Scribbr Plagiarism Checker | 88% | text, documents | documents | Free | Yes | — | AI Plagiarism Checker |
| GPTZero | 68% | text, documents | text, data | From $12.99/mo | Yes | — | AI Detector |
| Originality.AI | 64% | text, documents, web pages | text, data | From $12.95/mo | Yes | — | AI Detector |
| Winston AI | 71% | text, images, documents | data | From $10/mo | Yes | — | AI Detector |
| ZeroGPT Plus | 64% | text, documents | text | From $9.9/mo | Yes | — | AI Detector |
| Pangram Labs | 68% | text, images, documents | data | From $20/mo | Yes | — | AI Detector |
Frequently asked
What is the best free Turnitin alternative?
Scribbr Plagiarism Checker (88% match) is the closest free alternative to Turnitin: Scribbr Plagiarism Checker compares a document with a database of 99 billion web pages and 8 million publications and shows where the text matches existing sources. GPTZero (68% match) and Originality.AI (64% match) come next.
How is the match percentage calculated?
It measures how much of Turnitin's job a tool can take over: shared core category, how many of the same use cases it covers and how similar its feature set is. Popularity and ratings never change the percentage; they only break ties in the order. Lists are recomputed nightly and reviewed by editors for the most-visited tools.
How this list is ranked
The match score measures how much of Turnitin's job each tool can take over: shared core category, how many of the same use cases it covers, and how similar its feature set is. Popularity and ratings do not change the score; they only break ties in the order.
Lists are recomputed nightly from the live catalog and reviewed by our editors for the most-visited tools. Sponsored placements are marked and sit outside the ranking.