Compare the best AI content detectors and plagiarism checkers in 2026, with accuracy features and pricing. Check your text before you publish it.
✓ Proven accuracy in third-party AI-detection studies, kept current against the latest LLMs
✗ Free plan is capped at 2,000 words per scan and 3 scans a day
💰 Freemium👤 Content teams, publishers, and agencies verifying freelance/outsourced writing for AI use and plagiarism before it goes live
✓ Synonym Slider gives fine control over how much of the text gets reworded
✗ Free plan caps paraphrasing/humanizing at 125 words per request
💰 Freemium👤 Students, content writers, and professionals who need to reword, polish, and check their own writing (grammar, tone, plagiarism, AI-detection risk) across the apps and sites they already use
✓ Paraphrasing and citations grounded in 250M+ verified research articles, not generic web text
✗ Free plan's plagiarism/AI-detection checks are limited to 'lite' reports and previews
💰 Freemium👤 Students, researchers, and academics writing papers, theses, or clinical documents who need their work to meet journal submission and formatting standards
✓ Money-back guarantee if humanized output is still flagged as AI-generated
✗ Free trial is limited to just 250 words before requiring a paid plan
💰 Free trial👤 Content marketers, non-native English writers, and teams who need AI-assisted writing to read naturally and pass AI-detection checks used by publishers, platforms, or institutions
✓ Chat with PDF explains equations, methods, and jargon in plain language inside the paper itself
✗ Deeper features (Deep Research, Systematic Review, higher usage) are gated behind paid credits
💰 Freemium👤 Students, academics, and R&D teams who need to read, understand, and synthesize scientific papers faster, and produce literature reviews or research writing with proper citations
✓ Built around academic writing, with citations in 700+ styles and a reusable source library
✗ Pro is capped at 1,000 AI actions a month, and frontier models need the Ultra plan
💰 Freemium👤 Students, graduate researchers, and academics who want help drafting, editing, and citing essays, papers, and theses, with sources they can trace
✓ Built-in AI detector lets you check the rewritten text before you use it
✗ No free plan is listed on the pricing page — paid plans start at $29.99/mo
💰 Paid👤 Writers, students, and content teams who want AI-assisted drafts reworded to sound more natural, with a built-in detector to check the result
