SemrushBotSI is a bot in the SEO crawlers category, operated by Semrush.
Data collected by SEMrushBot is used for the On Page SEO Checker and SEO Content template tools reports Data collected by SEMrushBot is used for the Topic Research tool reports
SEO crawlers map links, keywords and technical issues for SEO tools and backlink databases. They help the tool's customers, often your competitors, rather than you. Rate limit or block the ones you do not use.
SemrushBotSI identifies itself with this user agent string:
Mozilla/5.0 (compatible; SemrushBot-SI/0.97; +http://www.semrush.com/bot.html)Anyone can copy a user agent string. Transfon Security also checks where each request comes from, so a request that claims to be a known crawler but comes from the wrong network is treated as a fake, not as the real crawler.
SemrushBotSI follows robots.txt, so these rules stop it crawling the paths you choose. robots.txt is a plain text file at the root of your domain, such as https://example.com/robots.txt.
User-agent: SemrushBot-SI Disallow: /
User-agent: SemrushBot-SI Disallow: /private/ Disallow: /search
User-agent: SemrushBot-SI Allow: /blog/ Disallow: /
User-agent: SemrushBot-SI Allow: / User-agent: * Disallow: /
User-agent: SemrushBot-SI group, SemrushBotSI ignores your User-agent: * rules, so repeat any that should still apply.SemrushBot-SI from SemrushBotSI's user agent; check Semrush's own documentation if it publishes a different robots.txt name.Treat robots.txt as a statement of your policy, and enforce it where requests arrive.
SemrushBotSI works for an SEO tool's customers, often your competitors. It adds server load without readers, so rate limit or block it unless you use the tool.
Transfon Security for publishersSEO crawlers map landing pages and links for competitor research. Keep SemrushBotSI's visits out of campaign data.
Transfon Security for advertisersSemrushBotSI can map your catalogue, prices and site structure for competitors. Block it unless you use the tool yourself.
Transfon Security for e-commerceAllow SemrushBotSI only if your team uses the tool; otherwise rate limit it on docs and marketing pages.
Transfon Security for SaaS and APIsrobots.txt is a request, not an enforcement. Transfon Security shows SemrushBotSI by name in the Top Bots report, so you can see how often it visits and which pages it reads. Block or allow it with a User Agent rule, or slow it down with a rate limit decision rule.
Transfon Security
SemrushBotSI is a bot in the SEO crawlers category, operated by Semrush. Data collected by SEMrushBot is used for the On Page SEO Checker and SEO Content template tools reports Data collected by SEMrushBot is used for the Topic Research tool reports
Yes. SemrushBotSI follows robots.txt, so a Disallow rule for the SemrushBot-SI user agent stops it from crawling the paths you list.
Add "User-agent: SemrushBot-SI" followed by "Disallow: /" to the robots.txt file at the root of your site. To enforce it, block requests whose user agent contains "SemrushBot-SI" at your WAF. In Transfon Security that is one User Agent block rule.
No. robots.txt is voluntary, so SemrushBotSI may not follow it, and anyone can send SemrushBotSI's user agent, so a fake SemrushBotSI ignores your rule. Enforce the rule where requests arrive, at your WAF, and check the source network.
SEO crawlers map links, keywords and technical issues for SEO tools and backlink databases. They help the tool's customers, often your competitors, rather than you. Rate limit or block the ones you do not use.
Transfon Security identifies every bot in this directory in your traffic reports, flags fake search crawlers, and lets you allow, block or rate limit each bot.
Privacy, security, monetization, and performance insights. A few emails a month, no spam.