Best UndetectedGPT Alternatives for AI Detection
30 AI tools that can replace UndetectedGPT for detecting AI-written content, ranked by how closely they match. The percentage is a match score, not a popularity score.
Replacing: UndetectedGPT — UndetectedGPT is an AI humanizer that rewrites machine-drafted text into natural writing aInput: text, documents · Output: text
1
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
94%Near drop-in replacement
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals6/10
- Feature description similarity18/20
Shared goals 2 of the 3 we tag UndetectedGPT for
Humanizing TextAI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
2
Undetectable AI bundles an AI text detector, an AI humanizer and an AI image detector into one account.
Input: text, images, documents · Output: text, data
Free trialFrom $5/moAPIBrowser extensionTeams
92%Near drop-in replacement
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals6/10
- Feature description similarity17/20
Shared goals 2 of the 3 we tag UndetectedGPT for
Humanizing TextAI 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.
3
ZeroGPT Plus can detect if text came from AI with high accuracy
Input: text, documents · Output: text
Free planFrom $9.9/mo
85%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals6/10
- Feature description similarity9/20
Shared goals 2 of the 3 we tag UndetectedGPT for
Humanizing TextAI Detection
Also tagged for
Plagiarism Checking
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
4
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
80%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity7/20
Shared goals 1 of the 3 we tag UndetectedGPT for
AI Detection
Also tagged for
Plagiarism Checking
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
5
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
80%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity7/20
Shared goals 1 of the 3 we tag UndetectedGPT for
AI Detection
Also tagged for
Plagiarism Checking
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
6
Dechecker AI breaks down AI detection differently
Input: text, documents · Output: text
Free planFrom $5/mo
81%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals6/10
- Feature description similarity6/20
Shared goals 2 of the 3 we tag UndetectedGPT for
Humanizing TextAI Detection
Also tagged for
Plagiarism Checking
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
7
ZeroGPT processes text quickly to detect AI-generated content
Input: text, images, video, documents · Output: text
From $7.99/mo
79%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals6/10
- Feature description similarity4/20
Shared goals 2 of the 3 we tag UndetectedGPT for
Humanizing TextAI Detection
Also tagged for
Fake Image DetectionPlagiarism Checking
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
8
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
82%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity10/20
Shared goals 1 of the 3 we tag UndetectedGPT for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
9
80%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity7/20
Shared goals 1 of the 3 we tag UndetectedGPT 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.
10
The free plan hands you 5,000 characters per check
Input: text, documents · Output: text
Free planFrom $7/mo
79%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity6/20
Shared goals 1 of the 3 we tag UndetectedGPT for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
11
79%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity6/20
Shared goals 1 of the 3 we tag UndetectedGPT for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
12
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
83%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals6/10
- Feature description similarity8/20
Shared goals 2 of the 3 we tag UndetectedGPT for
Humanizing TextAI Detection
Also tagged for
Plagiarism Checking
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
13
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
82%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity9/20
Shared goals 1 of the 3 we tag UndetectedGPT for
AI Detection
Also tagged for
Fake Image DetectionPlagiarism Checking
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
14
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
82%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity9/20
Shared goals 1 of the 3 we tag UndetectedGPT for
AI Detection
Also tagged for
Fake Image DetectionPlagiarism Checking
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
77%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity4/20
Shared goals 1 of the 3 we tag UndetectedGPT for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
16
AI Content Blocker for YouTube, Social Feeds & Google AI Overviews
Input: video, web pages · Output: data
75%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity2/20
Shared goals 1 of the 3 we tag UndetectedGPT for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
17
Copyleaks is a content authenticity platform that checks whether text was written by AI and whether it copies existing sources.
Input: text, images, video, documents, code · Output: data
From $13.99/moAPI
79%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity6/20
Shared goals 1 of the 3 we tag UndetectedGPT for
AI Detection
Also tagged for
Fake Image DetectionPlagiarism Checking
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
18
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
79%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity6/20
Shared goals 1 of the 3 we tag UndetectedGPT for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
19
AI or Not is an AI detector that checks whether images, text, video, audio and music were generated by AI, and flags deepfakes.
Input: text, images, audio, video · Output: data
Free planFrom $5/moAPITeams
78%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity5/20
Shared goals 1 of the 3 we tag UndetectedGPT 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.
20
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
77%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity4/20
Shared goals 1 of the 3 we tag UndetectedGPT 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.
21
Reality Defender detects deepfakes and AI-manipulated media across audio, video and images.
Input: images, audio, video · Output: data
Free planAPITeams
75%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity2/20
Shared goals 1 of the 3 we tag UndetectedGPT 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
Pindrop is an enterprise deepfake detection and identity verification system that watches live phone calls, video meetings and contact center traffic for synthetic voices, fake faces and fraudulent...
Input: audio, video · Output: data
Teams
75%Strong alternative
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity2/20
Shared goals 1 of the 3 we tag UndetectedGPT for
AI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
23
AI Humanizer by WriteHybrid rewrites AI-generated drafts into natural, human-sounding text while preserving your meaning.
Input: text · Output: text
Free planFrom $19/mo
69%Partial replacement — covers the main need with gaps · same core category as UndetectedGPT
00
How the score adds up
- Offers AI Detection as a secondary capability42/70
- Shares UndetectedGPT's other goals7/10
- Feature description similarity20/20
Shared goals 2 of the 3 we tag UndetectedGPT for
Humanizing TextAI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
24
Hive Moderation is an AI content moderation provider built for trust and safety teams at enterprise scale.
Input: text, images, audio, video · Output: data
APITeams
74%Partial replacement — covers the main need with gaps
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity1/20
Shared goals 1 of the 3 we tag UndetectedGPT 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.
25
Sensity AI is a forensic deepfake detection service that analyzes videos, images and audio for signs of AI manipulation.
Input: images, audio, video, web pages · Output: documents
APITeams
74%Partial replacement — covers the main need with gaps
00
How the score adds up
- Built for AI Detection (its core category)70/70
- Shares UndetectedGPT's other goals3/10
- Feature description similarity1/20
Shared goals 1 of the 3 we tag UndetectedGPT 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.
26
BypassGPT is an AI humanizer that rewrites machine-generated text so it reads like human writing and passes AI detectors.
Input: text · Output: text
API
72%Partial replacement — covers the main need with gaps · same core category as UndetectedGPT
00
How the score adds up
- Offers AI Detection as a secondary capability42/70
- Shares UndetectedGPT's other goals10/10
- Feature description similarity20/20
Shared goals 3 of the 3 we tag UndetectedGPT for
Humanizing TextAI DetectionRewriting
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
27
HIX Bypass is an AI humanizer that rewrites machine-generated text so it reads like a person wrote it and scores as human on detectors.
Input: text · Output: text
From $14.99/moAPI
72%Partial replacement — covers the main need with gaps · same core category as UndetectedGPT
00
How the score adds up
- Offers AI Detection as a secondary capability42/70
- Shares UndetectedGPT's other goals10/10
- Feature description similarity20/20
Shared goals 3 of the 3 we tag UndetectedGPT for
Humanizing TextAI DetectionRewriting
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
28
Humanizer AI is an editing room for AI-assisted drafts.
Input: text, documents · Output: text
From $10/moAPI
64%Partial replacement — covers the main need with gaps · same core category as UndetectedGPT
00
How the score adds up
- Offers AI Detection as a secondary capability42/70
- Shares UndetectedGPT's other goals7/10
- Feature description similarity15/20
Shared goals 2 of the 3 we tag UndetectedGPT for
Humanizing TextAI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
29
A content marketer at a SaaS company drafts blog posts using AI writing tools, then faces a problem
Input: text · Output: text
Free plan
62%Partial replacement — covers the main need with gaps · same core category as UndetectedGPT
00
How the score adds up
- Offers AI Detection as a secondary capability42/70
- Shares UndetectedGPT's other goals7/10
- Feature description similarity13/20
Shared goals 2 of the 3 we tag UndetectedGPT for
Humanizing TextAI Detection
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
30
Smodin is an AI writing toolkit that puts an AI content detector, an AI humanizer, a plagiarism checker, an AI writer, a rewriter and an AI chat assistant in one account.
Input: text, documents · Output: text, data
69%Partial replacement — covers the main need with gaps
00
How the score adds up
- Offers AI Detection as a secondary capability42/70
- Shares UndetectedGPT's other goals8/10
- Feature description similarity18/20
Shared goals 3 of the 3 we tag UndetectedGPT for
Humanizing TextAI DetectionRewriting
Also tagged for
Grammar CheckingWritingPlagiarism Checking
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
Can it really replace UndetectedGPT for detecting ai-written content? Vote on each alternative — no account needed. Votes gently reorder the list; they never change the match score.
Missing an alternative for detecting AI-written content? Suggest it
At a glance: top UndetectedGPT alternatives for AI Detection
| Tool | Match | Input | Output | Pricing | Free plan | Rating | Category |
|---|---|---|---|---|---|---|---|
| Detect.ai | 94% | text, documents | text | From $15.99/mo | Yes | — | AI Detector |
| Undetectable AI | 92% | text, images, documents | text, data | From $5/mo | No | — | AI Detector |
| ZeroGPT Plus | 85% | text, documents | text | From $9.9/mo | Yes | — | AI Detector |
| GPTZero | 80% | text, documents | text, data | From $12.99/mo | Yes | — | AI Detector |
| Originality.AI | 80% | text, documents, web pages | text, data | From $12.95/mo | Yes | — | AI Detector |
| Dechecker AI | 81% | text, documents | text | From $5/mo | Yes | — | AI Detector |
Frequently asked
What is the best UndetectedGPT alternative for detecting AI-written content?
Detect.ai (94% match) is the closest alternative to UndetectedGPT for detecting AI-written content: Detect.ai combines an AI content detector with a humanizer in a single browser tool. Undetectable AI (92% match) and ZeroGPT Plus (85% match) come next.
Is there a free alternative to UndetectedGPT for detecting AI-written content?
Yes. 18 of the 30 ranked alternatives have a free plan or free tier, including Detect.ai, ZeroGPT Plus, GPTZero.
How is the match percentage calculated?
It measures how much of UndetectedGPT's job a tool can take over for detecting AI-written content: 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 UndetectedGPT's job each tool can take over when the goal is detecting AI-written content: 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.