We've curated 45 of the best alternatives to Plagium AI Detector, ranked by feature overlap, topic similarity, user ratings, and popularity. Copyleaks - Plagiarism detector, Free AI Detector by ContentAtScale, and Originality lead the list as the closest matches.
Updated May 18, 2026
The list includes 11 free alternatives, 12 freemium, 15 paid, and 7 with a free trial, so whether you're looking for a no-cost replacement or a more capable paid tier, there's an option to compare. Plagium AI Detector itself is paid, which makes paid alternatives the most natural starting point.
Many of these tools cluster around use cases like Content Verification, Text Analysis, Ai Detection, and Plagiarism Detection — the same problem spaces Plagium AI Detector addresses. Cross-referencing tools that overlap on multiple topics gives a more reliable signal than category alone, because two products in the same category can still serve very different workflows.
Our ranking weighs eight signals: shared category, topic overlap, feature overlap, name and description text similarity (via PostgreSQL's pg_trgm and tsvector), Bayesian-smoothed user ratings, pricing-model match, popularity, and editorial overrides. Scores are then normalized within each tool's own candidate pool so the top match always represents the strongest available alternative.
Use the table of contents below to jump to free or paid alternatives, or scroll down to compare each option side-by-side with Plagium AI Detector.
Ranked by compatibility score
Ai Content Detection
Instantly detect plagiarism and AI-generated content.
Like Plagium AI Detector, Copyleaks - Plagiarism detector is in the Ai Content Detection category. Both are paid. Worth comparing on the detail page.
11 free and 12 freemium options.
15 paid options.
21 additional candidates
Like Plagium AI Detector, AI Checker is in the Ai Content Detection category. AI Checker is free, while Plagium AI Detector is paid. Worth comparing on the detail page.
Like Plagium AI Detector, ZeroGPT - Free ChatGPT Detector is in the Ai Content Detection category. ZeroGPT - Free ChatGPT Detector is free, while Plagium AI Detector is paid. Worth comparing on the detail page.
Copyleaks - Plagiarism detector ranks as the highest-scoring alternative to Plagium AI Detector, based on shared category, topic overlap, feature similarity, and user ratings. Ratings are still being collected for this tool.
Yes — 11 fully free and 12 freemium alternatives are available, including Winston AI, ZeroGPT, and GPTZero.
Copyleaks - Plagiarism detector is similarly priced (paid) and sits in the same category (Ai Content Detection). View its detail page to compare features, integrations, and reviews side-by-side.
Top Ai Content Detection alternatives include Copyleaks - Plagiarism detector, Free AI Detector by ContentAtScale, Originality, and AI Copy Scanner. These tools share the same primary category and have meaningful topic overlap with Plagium AI Detector.
Ai Content Detection
Detect AI-generated content with free online tool
Like Plagium AI Detector, Free AI Detector by ContentAtScale is in the Ai Content Detection category. Both are paid. Worth comparing on the detail page.
Ai Content Detection
Checked content's originality & plagiarism.
Like Plagium AI Detector, Originality is in the Ai Content Detection category. Both are paid. Worth comparing on the detail page.
Ai Content Detection
Detect AI-generated content with high accuracy.
Like Plagium AI Detector, AI Copy Scanner is in the Ai Content Detection category. Both are paid. Worth comparing on the detail page.
Ai Content Detection
Best AI detector and undetectable AI rewriter.
Like Plagium AI Detector, AI Undetect is in the Ai Content Detection category. Both are paid. Worth comparing on the detail page.
Ai Content Detection
Spot AI-generated text in seconds.
Like Plagium AI Detector, AI Content Detector by Leap is in the Ai Content Detection category. Both are paid. Worth comparing on the detail page.
Ai Content Detection
Detect AI-generated content with precision
Like Plagium AI Detector, AI Detect is in the Ai Content Detection category. Both are paid. Worth comparing on the detail page.
Ai Content Detection
Detect AI-generated text in a click.
Like Plagium AI Detector, GPT Radar is in the Ai Content Detection category. Both are paid. Worth comparing on the detail page.
Ai Content Detection
Detect AI-generated content in 30 languages
Like Plagium AI Detector, Copyleaks - AI content detector is in the Ai Content Detection category. Both are paid. Worth comparing on the detail page.
Ai Content Detection
Unmask AI-generated tweets instantly
Like Plagium AI Detector, TweetDetective is in the Ai Content Detection category. Both are paid. Worth comparing on the detail page.
Ai Content Detection
Bypass AI detectors with undetectable AI writing
Like Plagium AI Detector, AI Undetect is in the Ai Content Detection category. Both are paid. Worth comparing on the detail page.
Ai Content Detection
Instantly detect AI-generated content.
Like Plagium AI Detector, Winston AI is in the Ai Content Detection category. Winston AI is freemium, while Plagium AI Detector is paid. Worth comparing on the detail page.
Ai Content Detection
Detect AI-generated text with high accuracy.
Like Plagium AI Detector, ZeroGPT is in the Ai Content Detection category. ZeroGPT is freemium, while Plagium AI Detector is paid. Worth comparing on the detail page.
Ai Content Detection
Detect AI-generated content with accuracy
Like Plagium AI Detector, GPTZero is in the Ai Content Detection category. GPTZero is freemium, while Plagium AI Detector is paid. Worth comparing on the detail page.
Ai Content Detection
Detect AI-generated text with high accuracy
Like Plagium AI Detector, GPTKit is in the Ai Content Detection category. GPTKit is freemium, while Plagium AI Detector is paid. Worth comparing on the detail page.
Ai Content Detection
Polishing text accuracy with AI.
Like Plagium AI Detector, AI Detector is in the Ai Content Detection category. AI Detector is freemium, while Plagium AI Detector is paid. Worth comparing on the detail page.
Ai Content Detection
Unmask AI-generated content with precision
Like Plagium AI Detector, AI Checker Tool is in the Ai Content Detection category. AI Checker Tool is free, while Plagium AI Detector is paid. Worth comparing on the detail page.
Ai Content Detection
Discover WriteHuman's AI Detector: distinguishing between AI-generated and human-written text.
Like Plagium AI Detector, WriteHuman: AI Detector is in the Ai Content Detection category. WriteHuman: AI Detector is freemium, while Plagium AI Detector is paid. Worth comparing on the detail page.
Ai Content Detection
Detect AI-generated content with precision
Like Plagium AI Detector, AI Detector Write is in the Ai Content Detection category. AI Detector Write is free, while Plagium AI Detector is paid. Worth comparing on the detail page.
Ai Content Detection
Detect AI-generated images to protect authenticity.
Like Plagium AI Detector, Nuanced is in the Ai Content Detection category. Nuanced is free-trial, while Plagium AI Detector is paid. Worth comparing on the detail page.
Ai Content Detection
Spot AI-generated content as you browse.
Like Plagium AI Detector, Detect GPT is in the Ai Content Detection category. Detect GPT is free, while Plagium AI Detector is paid. Worth comparing on the detail page.
Ai Content Detection
Detect AI-generated text with advanced algorithms
Like Plagium AI Detector, Crossplag is in the Ai Content Detection category. Crossplag is freemium, while Plagium AI Detector is paid. Worth comparing on the detail page.
Ai Content Detection
Detect AI-generated text with precision
Like Plagium AI Detector, ZeroGPT.CC is in the Ai Content Detection category. ZeroGPT.CC is free, while Plagium AI Detector is paid. Worth comparing on the detail page.
Ai Content Detection
Detect AI-generated content with precision.
Like Plagium AI Detector, Detecting-AI.com is in the Ai Content Detection category. Detecting-AI.com is freemium, while Plagium AI Detector is paid. Worth comparing on the detail page.
17 more free/freemium alternatives listed below. Browse all Plagium AI Detector alternatives ↓
23 free or freemium alternatives to Plagium AI Detector on /tools/plagium-ai-detector/alternatives.
9 more paid alternatives listed below. Browse all Plagium AI Detector alternatives ↓
15 paid alternatives to Plagium AI Detector on /tools/plagium-ai-detector/alternatives.
Like Plagium AI Detector, AI Text Detector is in the Ai Content Detection category. AI Text Detector is freemium, while Plagium AI Detector is paid. Worth comparing on the detail page.
Neither Plagium AI Detector nor Copyleaks - Plagiarism detector has user ratings yet — be the first to review either tool to help future visitors compare them.
