Crossplag vs Frase

Crossplag checks whether pasted text was written by a human or generated by an AI chatbot, returning a confidence percentage after you paste copy into the detector at app.crossplag.com. The same company also runs plagiarism scans against more than 100 billion texts for students, academics, and bloggers.

Turnitin-style plagiarism tools flag copied sources; Crossplag pairs that similarity checking with a separate AI detector trained on over 1.5 billion parameters to score chatbot-written assignments, resumes, and blog drafts. The AI detector is free and does not consume plagiarism credits, which matters when you only need a quick originality check on marketing copy.

Inspera acquired Crossplag and now sells the education stack under Inspera Assessment, but the consumer AI detector and individual plagiarism plans still live on crossplag.com. It fits teachers screening student essays, bloggers verifying SEO drafts, and recruiters checking whether cover letters were chatbot-written. English is the only supported language for AI detection today.

Frase runs the full content loop for SEO and generative engine optimization: site audit, topic research, drafting, CMS publishing, ranking monitoring, and AI citation tracking. You start with a site auditor that scores each page for Google and AI readiness, then move drafts through WordPress, Webflow, Sanity, Wix, or FraseCMS hosting.

Most teams stitch together a research tab, a writing app, and a rank tracker that never talk to each other. Frase keeps brand context, competitor SERP data, and optimization scores in one workflow so Content Guard can draft fixes when a live page slips instead of waiting for a weekly report.

In-house content teams, SEO leads, and agencies managing multiple domains are the core buyers. Plans start at $39 per month billed yearly with a 7-day trial that needs no credit card, and Professional at $103 per month adds more seats, audit volume, and broader AI visibility tracking.