Best similarity detection tools tools in 2025

Rephrasy

Turns AI-generated text into relatable, human-like writing.

Free trial + from $9.99/one-time
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Smodin AI Content Detector

Detects AI-generated text for content authenticity verification.

Perfectessaywriter

Generate organized, high-quality essays with AI assistance.

CoWriter AI

Speed up writing and research with intelligent assistance.

Free trial + from $11.00/m
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GPTZero

Identify AI-generated text and enhance writing authenticity.

PaperPilot

Upload and analyze research papers with AI-driven insights.

PrimeHub

Streamlined data validation for analytics and engineering teams.

OpenRead

Search and summarize academic research with real-time updates.

ZeroGPT.net

Identify human and AI-generated text with advanced algorithms.

Passed.ai

Detects AI-generated content and plagiarism in student work.

HeinOnline

Comprehensive online research for legal and scholarly documents.

ImageTwin

Software for detecting image integrity issues in research articles.

IPscreener

Explore and analyze patent data for innovation insights.

Subscription + from €29/m
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TextRank

Automatically summarizes texts and extracts key phrases efficiently.

Neota Logic

No-code automation for streamlined workflows and decision-making.

Further AI

AI Assistants for automating insurance industry tasks.

ContentDetector

Identify AI-generated text with high accuracy and detailed reports.

rubricpro.ai

AI-driven grading assistant for efficient document evaluation.

chatd

Interact with documents through an intuitive chat interface.

Lil GPT X

Streamlined vendor document assessment and risk evaluation.