Best Free Originality.AI Alternatives
20 alternatives to Originality.AI with a free plan or free tier, ranked by how closely they match. The percentage is a match score, not a popularity score.
Replacing: Originality.AIInput: text, documents, web pages · Output: text, data
1
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
Favorite of teachers and students, with Chrome extension, Canvas link and API with a free tier
Input: text, documents · Output: text, data
Free planFrom $12.99/moAPIBrowser extensionTeams
80%Strong alternative · same core category as Originality.AI
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 2 of the 2 we tag Originality.AI for
AI DetectionPlagiarism Checking
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
2
Winston AI is an AI content detector and plagiarism checker built for education, SEO, and writing.
Detector and plagiarism checker for education, SEO and writing with a free trial; team plans
Input: text, images, documents · Output: data
Free planFrom $10/moAPITeams
80%Strong alternative · same core category as Originality.AI
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 2 of the 2 we tag Originality.AI for
AI DetectionPlagiarism Checking
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.
3
Pangram Labs makes an AI detector that checks whether text was written by a person or generated by a language model.
Checks whether text is human-written or AI-generated; Google Docs and Gmail integrations
Input: text, images, documents · Output: data
Free planFrom $20/moAPIBrowser extension
74%Partial replacement — covers the main need with gaps · same core category as Originality.AI
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 2 of the 2 we tag Originality.AI for
AI DetectionPlagiarism Checking
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.
4
Writing confidence that follows you everywhere
Everyday writing help across apps, centred on grammar checking; free tier
Input: text · Output: text
Free planFrom $12/mo
72%Partial replacement — covers the main need with gaps
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 2 of the 2 we tag Originality.AI for
AI DetectionPlagiarism Checking
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.
5
Sapling AI Detector scores pasted text or uploaded PDF and Word files for the probability that a model wrote it.
Scores pasted text, PDFs and Word files; runs in Chrome, Outlook and Google Docs
Input: text, documents · Output: data
Free planFrom $12/moAPIBrowser extensionTeams
70%Partial replacement — covers the main need with gaps · same core category as Originality.AI
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 1 of the 2 we tag Originality.AI for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
6
ZeroGPT Plus can detect if text came from AI with high accuracy
Detection with high claimed accuracy, plus plagiarism and humanizer tools
Input: text, documents · Output: text
Free planFrom $9.9/mo
66%Partial replacement — covers the main need with gaps · same core category as Originality.AI
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 2 of the 2 we tag Originality.AI for
AI DetectionPlagiarism Checking
Also tagged for
Humanizing Text
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
7
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
Detection across text, images and other media in one tool with a free tier
Input: text, images, audio, video · Output: data
Free planFrom $3.99/mo
62%Partial replacement — covers the main need with gaps · same core category as Originality.AI
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 1 of the 2 we tag Originality.AI 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.
8
Dechecker AI breaks down AI detection differently
Offers a different take on AI detection, with a humanizer, from $5 a month
Input: text, documents · Output: text
Free planFrom $5/mo
61%Partial replacement — covers the main need with gaps · same core category as Originality.AI
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 2 of the 2 we tag Originality.AI for
AI DetectionPlagiarism Checking
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
OmniDetect is an AI content detector that focuses on what to fix before you submit a piece of writing.
Points out what to fix before you submit your writing with a free tier
Input: text, documents, web pages · Output: text, data
Free planFrom $9.99/mo
61%Partial replacement — covers the main need with gaps · same core category as Originality.AI
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 1 of the 2 we tag Originality.AI for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
10
The free plan hands you 5,000 characters per check
Free plan covers 5,000 characters per check; paid from $7 a month
Input: text, documents · Output: text
Free planFrom $7/mo
61%Partial replacement — covers the main need with gaps · same core category as Originality.AI
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 1 of the 2 we tag Originality.AI for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
11
Scribbr AI Detector is a free checker that estimates whether a piece of writing was produced by an AI model.
Free checker that estimates whether a piece of writing came from an AI
Input: text · Output: data
Free plan
61%Partial replacement — covers the main need with gaps · same core category as Originality.AI
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 2 of the 2 we tag Originality.AI for
AI DetectionPlagiarism Checking
Also tagged for
Humanizing Text
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
12
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.
Plagiarism scan against 99 billion web pages; fits Word and Google Drive
Input: text, documents · Output: documents
Free plan
61%Partial replacement — covers the main need with gaps
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 2 of the 2 we tag Originality.AI for
AI DetectionPlagiarism Checking
Also tagged for
Grammar Checking
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
13
AI or Not is an AI detector that checks whether images, text, video, audio and music were generated by AI, and flags deepfakes.
Covers images, video, audio and music as well as text; from $5
Input: text, images, audio, video · Output: data
Free planFrom $5/moAPITeams
61%Partial replacement — covers the main need with gaps · same core category as Originality.AI
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 1 of the 2 we tag Originality.AI 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.
14
60%Partial replacement — covers the main need with gaps · same core category as Originality.AI
00
How the score adds up
- Same core category55/55
- Covers Originality.AI's goals16/25
- Feature description similarity4/20
Capped below the editor-ranked picks above it.
Shared goals 1 of the 2 we tag Originality.AI for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
15
Job applications get filtered by AI detection systems now
Input: text, documents · Output: text
Free plan
60%Partial replacement — covers the main need with gaps · same core category as Originality.AI
00
How the score adds up
- Same core category55/55
- Covers Originality.AI's goals16/25
- Feature description similarity5/20
Capped below the editor-ranked picks above it.
Shared goals 1 of the 2 we tag Originality.AI for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
16
Rephrase until it sounds right
Input: text, images, documents · Output: text, images, documents, slides
Free planFrom $19.95/mo
57%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Originality.AI's goals19/25
- Feature description similarity8/20
Capped below the editor-ranked picks above it.
Shared goals 2 of the 2 we tag Originality.AI for
AI DetectionPlagiarism Checking
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.
17
Reality Defender detects deepfakes and AI-manipulated media across audio, video and images.
Input: images, audio, video · Output: data
Free planAPITeams
60%Partial replacement — covers the main need with gaps · same core category as Originality.AI
00
How the score adds up
- Same core category55/55
- Covers Originality.AI's goals16/25
- Feature description similarity6/20
Capped below the editor-ranked picks above it.
Shared goals 1 of the 2 we tag Originality.AI 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.
18
56%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Originality.AI's goals19/25
- Feature description similarity7/20
Capped below the editor-ranked picks above it.
Shared goals 2 of the 2 we tag Originality.AI for
AI DetectionPlagiarism Checking
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.
19
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
53%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Originality.AI's goals19/25
- Feature description similarity4/20
Capped below the editor-ranked picks above it.
Shared goals 2 of the 2 we tag Originality.AI for
AI DetectionPlagiarism Checking
Also tagged for
Humanizing Text
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
20
Trinka is an AI writing assistant and grammar checker aimed at academic and technical writing.
Input: text, documents · Output: text, documents
Free planTeams
56%Limited overlap
00
How the score adds up
- One lists the other's core category30/55
- Covers Originality.AI's goals19/25
- Feature description similarity7/20
Capped below the editor-ranked picks above it.
Shared goals 2 of the 2 we tag Originality.AI for
AI DetectionPlagiarism Checking
Also tagged for
Grammar CheckingRewritingWriting
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
Can it really replace Originality.AI? Vote on each alternative — no account needed. Votes gently reorder the list; they never change the match score.
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At a glance: top Originality.AI alternatives
| Tool | Match | Input | Output | Pricing | Free plan | Rating | Category |
|---|---|---|---|---|---|---|---|
| GPTZero | 80% | text, documents | text, data | From $12.99/mo | Yes | — | AI Detector |
| Winston AI | 80% | text, images, documents | data | From $10/mo | Yes | — | AI Detector |
| Pangram Labs | 74% | text, images, documents | data | From $20/mo | Yes | — | AI Detector |
| Grammarly | 72% | text | text | From $12/mo | Yes | — | AI Grammar Checker |
| Sapling AI Detector | 70% | text, documents | data | From $12/mo | Yes | — | AI Detector |
| ZeroGPT Plus | 66% | text, documents | text | From $9.9/mo | Yes | — | AI Detector |
Frequently asked
What is the best free Originality.AI alternative?
GPTZero (80% match) is the closest free alternative to Originality.AI: 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. Winston AI (80% match) and Pangram Labs (74% match) come next.
What is the best Originality.AI alternative for checking for plagiarism?
Copyleaks ranks first for checking for plagiarism at 82% match. See the full list of Originality.AI alternatives for Plagiarism Checking.
How is the match percentage calculated?
It measures how much of Originality.AI'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 Originality.AI'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.