Text Similarity Checker
The best 50 Text Similarity Checker AI tools - Free & Paid
Explore 50 AI for Text Similarity Checker
TextAdviser delivers AI‑powered language tools: grammar checking, plagiarism detection, syntactic analysis, fast text generation, rewriting, tone humanization, summarization, and name/title creation. It supports English, Spanish, Portuguese, Italian, French, and German for writers, students, markete
Free
PlagiarismSearch.com compares submitted text to a vast database of web pages, journals, and printed sources, highlighting matches and providing similarity reports, AI‑content detection, readability checks, spell‑check, and API integration for real‑time academic integrity.
Paid
Quetext is an all‑in‑one writing platform offering plagiarism detection, AI content detection, real‑time grammar and spell correction, summarization, paraphrasing, and citation generation. It supports PDF, DOC, TXT files with bulk uploads for students, teachers, researchers, and creators.
Freemium
- $8/mo
This AI tool is a free online writing assistant with advanced features to enhance writing skills and prevent plagiarism.
Freemium
Textbuddy is an AI‑powered rewriter and plain‑English editor that flags long sentences, complex words, passive voice, and filler words, providing a readability score. It offers synonyms, CEFR language levels, keyword repetition stats, and supports over 50 languages.
Subscription
NoPlagio checks uploaded documents against 80 million academic articles and live web sources, supporting 129 languages. It gives similarity scores, color‑coded plagiarism types (citation, paraphrase, improper reference), source links, and protects privacy by never storing files.
Freemium
LanguageTool is an AI grammar, spelling, and style checker supporting 30+ languages. It offers real‑time browser extensions, desktop and Word add‑ins, advanced Picky Mode, paraphrasing, and an API for developer integration.
Free
QuillBot is a writing and editing tool offering features such as paraphrasing, grammar and plagiarism checks, citation generation, and content creation assistance, all accessible through a Chrome extension or online platform.
Freemium
- $33/mo
Scribbr offers academic writing support with professional editing, plagiarism detection, citation generation across styles, AI‑powered proofreading, paraphrasing, summarizing, sentence rewriting, and a Chrome extension for in‑browser citations, helping students and researchers produce polished manus
Freemium
The Free AI Plagiarism Checker accurately detects plagiarism in multiple languages by scanning billions of sources. It supports various file formats, analyzes up to 200,000 words, and provides detailed reports on total and partial matches.
Freemium
TextGears is a grammar and spell checker with an API for automated proofreading, readability scoring, and text analysis. It supports multiple languages and offers both cloud-based and self-hosted deployment for integration into various business workflows.
Subscription
JustDone AI is an AI-powered assistant for research, writing, and studying, offering plagiarism checking, paraphrasing, summarization, and citation generation. It ensures content originality and supports seamless integration via a browser extension for professionals, students, and marketers.
Freemium
- $19.99/mo
AI Text Humanizer turns machine‑generated prose into natural, human‑readable text, removes repetitive patterns, offers readability scores, and supplies API and web interface with counters. It supports multiple languages, protects data, and assists students, writers, marketers, and corporate teams.
Freemium
Wordvice AI provides real‑time grammar checking, paraphrasing, translation, summarization, plagiarism and AI‑content detection, plus citation generation across multiple languages. It integrates with Chrome and Word, supporting students, researchers, professionals, teams, and offers on‑demand human e
Freemium
- $8.45/mo
AI-based plagiarism remover rewrites duplicate text while preserving context and readability, offering modes (Word Changer, Formal, Shorten), file upload/download, 15+ languages and integrated tools for checking, paraphrasing, grammar, summarizing and citation generation and export.
Free
Thesify is an academic assistant that offers feedback on theses, dissertations, and grant proposals, evaluating strength, evidence, clarity, and rubric alignment. It provides instant citation support from 200 million references and delivers article summaries, semantic literature search, and paper di
Freemium
InstaText is an AI editing assistant that highlights suggestions for clarity, flow, word choice, and grammar. Users can accept or reject each change, select dialect, formality, or add custom terms. It works on Chrome, Gmail, Slack, Docs, Overleaf, and Word.
Paid
- $9.99/mo
Originality.ai evaluates text for AI generation, plagiarism, factual accuracy, readability, grammar, and SEO. The Chrome extension and web app enable on‑page checks, bulk scanning, PDF uploads, and API integration for writers and editors.
Free trial
- $12.95/mo
Word Spinner is an AI‑powered writing assistant that improves tone, flow, and readability for blog posts, emails, ads, and web copy. It offers grammar checks, tone analysis, and a Chrome extension supporting 100+ languages.
Subscription
- $29/mo
AITextChecker.pro is an AI-powered tool that detects AI-generated content from models like ChatGPT, GPT-4, and others with over 97% accuracy. It offers instant, detailed analysis in multiple languages, supports bulk checking, and ensures privacy by not storing content.
Free trial
An AI paraphrasing tool that rewords up to 125 words per input with unlimited use. Offers ten modes, a synonym slider, AI thesaurus, export options, originality detection, browser extensions, and multilingual support for students, researchers, and professionals.
Subscription
AI Text Generator creates original drafts, blog posts, emails, reports, and social captions from prompts, keywords or source text. Browser-based, it lets users set length, tone and audience, refine outputs, and copy or download results.
Freemium
Decopy is a free AI content detection tool with 99% accuracy, capable of identifying AI-generated text, providing detailed reports, and enhancing text quality. It supports multiple languages and is user-friendly and versatile.
Free
Linguix is a writing tool that offers free grammar check, analyzes team performance over-time, can be accessed through various platforms, and has a clean and modern UI.
Freemium
- $99
MyDetector is a free tool that detects AI-generated text and humanizes it to ensure authenticity. It supports multiple languages, offers 99% accuracy, and refines content to match human-like quality.
Free
GPTZero AI Detector scans documents for potential AI-generated content, providing in-depth results on AI probabilities, vocabulary analysis, and hallucination detection, as well as plagiarism checking and authorship verification capabilities.
Freemium
- $12/mo
UnAIMyText is a free AI humanizer that converts robotic AI-generated content into natural, human-like writing. It preserves original meaning while enhancing tone, readability, and SEO, and bypasses AI detection tools like Turnitin or GPTZero.
Free
CorrectEnglish is an AI writing assistant delivering spelling, grammar, and style corrections on Android, iOS, and browsers. It offers contextual word suggestions, error detection, a plagiarism checker, formatting guides, readability scores, and integrates with extensions and research tools.
Freemium
- $24/mo
Humanize AI converts AI‑generated text into natural, readable language while preserving meaning, keywords, and SEO value. It supports multiple languages, works on any device without registration, removes plagiarism, and evades detection systems.
Free
Copyleaks delivers AI text and image detection, plagiarism checking, grammar correction, and text moderation in 30+ languages. It integrates via API, LMS, browser extensions, and Google Docs, supports major LLMs, and ensures secure, compliant workflows for education and enterprise.
Free
- $13.99/mo
Reescribir Textos es una herramienta AI que reestructura oraciones, párrafos y artículos manteniendo su significado, con modos sencillo, medio, formal e inteligente. Permite pegar, subir archivos y descargar resultados en DOC, facilitando la generación de contenido único y legible.
Free
Rewrites text in seven styles—Simple, Creative, Formal, etc.—across 17 languages, preserving meaning while enhancing grammar, punctuation, and readability. Removes duplicate phrases for plagiarism‑free output and works with plagiarism/readability tools for students, writers, and SEOs.
Paid
- $3
Text Enhancer AI corrects grammar, rephrases, and restructures content in multiple languages. It offers plagiarism checks, tone adjustments, and alternative phrasing while preserving meaning. Users paste text, then receive a polished version within seconds.
Freemium
AI Essay Checker spots AI‑generated content, grammar errors, and plagiarism in real time. It offers multilingual support, a rich text editor, and local processing for privacy, aiding students, teachers, writers, SEO pros, and legal professionals.
Freemium
ZeroGPT is a comprehensive AI tool suite offering advanced features for content detection, text refinement, and translation, including AI detection, plagiarism checking, humanization, and summarization.
Freemium
- $7.99/mo
WordChanger is an AI‑powered word rewriter that suggests alternative vocabulary, adjusts tone, and corrects grammar in real time. It highlights replacements for easy acceptance and offers readability analytics, fluency checks, and plagiarism scanning across multiple languages.
Paid
Web‑based grammar checker supporting 27 languages—including Tagalog and English variants—highlights spelling, grammar, punctuation errors and offers corrections. It accepts rich text up to 15,000 characters, detects GPT‑style typos, and includes an AI content detector, usable from any browser.
Free
Textero is an AI academic writing assistant that drafts, edits and exports essays from uploaded guidelines and sources, with citation formatting (MLA, APA, Chicago), plagiarism/AI-detection, PDF summarizer, outline generator, paraphraser, research tools, and Google Docs export.
Freemium
- $19.99/mo
An AI platform that rewrites text in eight styles—Standard, Fluency, Humanizer, Simplify, Creative, Academic, Shorten, Expand—while supporting custom modes, tone settings, synonym selection, audio‑to‑text, OCR, and a research panel. Available via browser extensions, mobile apps.
Free
Getsolved.ai is a comprehensive AI toolkit for text analysis and refinement. It helps students, professionals, and creators verify originality, check facts, improve grammar, and rewrite content.
Freemium
- $14.99/mo
AI Summarizer quickly condenses essays, reports, and articles into short paragraphs or bullet lists. Paste text, upload DOCX/TXT/image, or give a URL; adjust summary length or set custom styles. Supports Spanish, French, German, Portuguese, and offers private, downloadable .docx outputs.
Free
iAsk.Ai delivers instant, factual answers to natural‑language questions from authoritative web sources, and offers essay drafting, advanced grammar checks, academic summarization, PDF analysis, image generation, URL bullet‑point briefs, and one‑click grammar correction. Accessible via browser extens
Freemium
- $9.95/mo
Wordtune uses AI to rewrite, paraphrase, and correct English text, adjusting tone and length, offering summarization, fact‑checking, and multi‑language translation to aid students, academics, professionals, and creators, improving consistency and accuracy.
Freemium
TextFlip.ai is a Chrome extension that paraphrases blog posts, essays, product descriptions, and social media content while preserving meaning. It supports keyword replacement, custom instructions, AI‑detector evasion, PDF chat, and summarization for writers, students, and marketers.
Freemium
- $19/mo
OneClickHuman is a free AI tool that converts content into human-like text with perfect grammar and high readability. Improve the quality of your content, restructure it for better readability and flow. Sign up for free or upgrade for increased word limit and daily usage.
Free
AI Humanizer turns AI‑generated text into natural language while preserving meaning. It detects AI origin with leading systems, supports 50+ languages and long documents, offers Chrome extension and API, and lets users select pre‑built models or clone their own style.
Subscription
- $8.25/mo
X Detector analyzes up to 5,000 characters, giving per‑word probability scores to identify whether a passage was written by ChatGPT, Claude, Gemini, or a human. It supports over 20 languages, processes millions of texts, and encrypts data for privacy.
Freemium
Humanize AI Text converts AI‑generated content into natural, human‑sounding prose while preserving meaning. It works browser‑free, supports unlimited words in multiple languages, and produces plagiarism‑free output that passes AI‑detection tools.
Freemium
PaperTyper generates academic drafts from prompts, offering built‑in plagiarism checking, grammar correction, and citation formats (MLA, APA, Chicago, Harvard, Turabian). Users can edit, format, and export content as Word or PDF at any time.
Free
StealthWriter converts AI‑generated text into natural, human‑like content by correcting errors and odd phrasing across multiple languages. It includes an AI detector to confirm human likeness and supports models like ChatGPT, Claude, or Llama.
Free
- $20/mo