Everything You Want to Know about SplitSignalBot
SplitSignalBot crawls on behalf of Semrush's SplitSignal tool, which runs SEO A/B tests on a website.
Last verified August 15, 2026 against Semrush's published crawler docs
Why it's crawling your site
Triggered when a Semrush customer runs a SplitSignal SEO A/B test against your domain.
How SplitSignalBot views your website
SplitSignalBot fetches raw page HTML (full page html) — it does not execute JavaScript. Content that only appears after client-side rendering is invisible to it.
Paste a URL for the rendered-vs-crawled diff, blocked resources, and the sections that never reach the bot.
How to block SplitSignalBot
Add the rule below to your site's robots.txt. Most crawlers, including SplitSignalBot, check for changes within 24 hours.
User-agent: SplitSignalBot
Disallow: /Need the full walkthrough?
Partial blocks, per-directory rules, Cloudflare and server-level options, verification.