Semrush Plagiarism Checker

What does Semrush Plagiarism Checker do?

The Semrush Plagiarism Checker crawler (semrushbot-ft) discovers and collects web pages and hyperlinks to build a crawl frontier for Semrush's Plagiarism Checker tool. Collected data also feeds other Semrush products like Backlink Analytics, Site Audit, and Content Toolkit. When your content appears in Plagiarism Checker results, source URLs are displayed and clickable, which can drive referral traffic back to your site.

Should I allow and optimize for Semrush Plagiarism Checker to drive organic growth?

Allowing semrushbot-ft supports your visibility across multiple Semrush products used by millions of SEO professionals and content marketers. The Plagiarism Checker surfaces source URLs in its results, creating a direct referral path. Your site also appears in Backlink Analytics and Site Audit reports, which influences how SEO practitioners discover and recommend content. Blocking this crawler removes your site from these indexes, reducing your presence in a widely used SEO ecosystem.

Data Usage & Training

It is unclear whether content crawled by semrushbot-ft is used to train AI models. Semrush's privacy policy describes internal uses such as data analysis, product improvement, and research, but does not explicitly confirm or deny AI training. The primary purpose of this crawler is to power Semrush's product indexes and reports.

How Semrush Plagiarism Checker Accesses Content

Here's how Semrush Plagiarism Checker accesses your site and understands your content:

• Fetches HTML via standard HTTP requests
• Follows hyperlinks to discover new pages and build a crawl frontier
• Respects robots.txt Disallow, Allow, Sitemap, and Crawl-delay directives
• Adjusts request frequency based on server load and robots.txt rules
• JavaScript rendering capability is unknown

Continuous and adaptive. Semrush maintains a crawl frontier and revisits pages according to internal policies, adjusting request frequency based on server load and robots.txt directives. Changes to robots.txt may take up to one hour or approximately 100 requests to be detected.

How to Block or Control Semrush Plagiarism Checker

To block the Semrush Plagiarism Checker crawler via robots.txt: User-agent: SemrushBot-FT Disallow: / You can also request domain exclusion from Plagiarism Checker results through the Semrush product UI, or contact [email protected] for support. IP-based blocking is discouraged and unreliable because Semrush does not use consecutive IP blocks and does not publish IP ranges. Place your robots.txt at the site root and ensure it returns HTTP 200. A 4xx response is treated as if no robots.txt exists (crawling proceeds), while a 5xx response halts crawling entirely.

Common Issues & Troubleshooting

Watch out for these common problems when working with Semrush Plagiarism Checker:

• Robots.txt changes can take up to one hour or ~100 requests before the crawler detects them
• Crawl-delay values above 10 seconds are silently truncated to 10 seconds
• A robots.txt returning 4xx is treated as missing, meaning the crawler will proceed without restrictions
• A robots.txt returning 5xx prevents all crawling, which may not be your intent
• IP-based blocking is ineffective because Semrush does not use consecutive IP ranges
• If the crawler appears to ignore your rules, Semrush recommends sending logs to [email protected] for investigation