AI crawler access · zscaler.com
Does zscaler.com block GPTBot and other AI crawlers?
GPTBot: partially blockedAs of 2026-10-03, the robots.txt of zscaler.com blocks 0 of 29 AI crawlers on the home page and partially blocks 10 more: GPTBot is partially blocked, ClaudeBot is partially blocked and PerplexityBot is partially blocked.
- Policy: Open (No listed AI crawler is blocked on the home page)
- AI search access: 100% of the AI search and assistant crawlers we track may fetch the home page (these decide whether AI answers can cite the site).
- robots.txt: found at
https://zscaler.com/robots.txt - llms.txt: yes
- Content-Signal: none
- Category: Other · domain: .com · popularity band: Tranco 1001-3000
- Last checked: (daily)
All 29 AI crawlers on zscaler.com
Status for the home page (/) under zscaler.com's robots.txt. Partially blocked = home page allowed, some paths disallowed.
| Crawler | Operator | robots.txt |
|---|---|---|
| Training crawlers | ||
| GPTBot | OpenAI | partial |
| ClaudeBot | Anthropic | partial |
| Google-Extended | partial | |
| Applebot-Extended | Apple | partial |
| Meta-ExternalAgent | Meta | allowed |
| Amazonbot | Amazon | allowed |
| MistralAI-Training | Mistral | allowed |
| CCBot | Common Crawl | allowed |
| Bytespider | ByteDance | allowed |
| cohere-ai | Cohere | partial |
| AI search crawlers | ||
| OAI-SearchBot | OpenAI | partial |
| Claude-SearchBot | Anthropic | partial |
| PerplexityBot | Perplexity | partial |
| Google-CloudVertexBot | allowed | |
| Applebot | Apple | allowed |
| meta-webindexer | Meta | allowed |
| Amzn-SearchBot | Amazon | allowed |
| DuckAssistBot | DuckDuckGo | allowed |
| MistralAI-Index | Mistral | allowed |
| User-triggered fetch crawlers | ||
| ChatGPT-User | OpenAI | partial |
| Claude-User | Anthropic | partial |
| Perplexity-User | Perplexity | allowed |
| Google-GeminiNotebook | allowed | |
| Google-Agent | allowed | |
| meta-externalfetcher | Meta | allowed |
| Amzn-User | Amazon | allowed |
| MistralAI-User | Mistral | allowed |
| Ads review crawlers | ||
| OAI-AdsBot | OpenAI | allowed |
| meta-externalads | Meta | allowed |
Compared with other other sites in the index: 11.6% of them block GPTBot and 10.4% block ClaudeBot (n=6685). Across all 8,357 readable sites: 12% block GPTBot. All other sites →
On .com domains: 12.4% of 4,463 readable sites block GPTBot and 19.4% serve an llms.txt. All .com sites →
History
No change recorded since daily tracking started on 2026-10-02. We re-check zscaler.com every day; a change in its AI crawler rules shows up here and on the index page.
FAQ
- Does zscaler.com block GPTBot?
- Partly. As of 2026-10-03, https://zscaler.com/robots.txt allows GPTBot (OpenAI's AI training crawler) on the home page but disallows some paths.
- Does zscaler.com block ClaudeBot?
- Partly. As of 2026-10-03, https://zscaler.com/robots.txt allows ClaudeBot (Anthropic's AI training crawler) on the home page but disallows some paths.
- Does zscaler.com block PerplexityBot?
- Partly. As of 2026-10-03, https://zscaler.com/robots.txt allows PerplexityBot (Perplexity's AI search crawler) on the home page but disallows some paths.
- Can ChatGPT search (OAI-SearchBot) crawl zscaler.com?
- Partly. As of 2026-10-03, https://zscaler.com/robots.txt allows OAI-SearchBot (OpenAI's AI search crawler) on the home page but disallows some paths.
- Does zscaler.com block Google-Extended (Gemini training)?
- Partly. As of 2026-10-03, https://zscaler.com/robots.txt allows Google-Extended (Google's AI training crawler) on the home page but disallows some paths.
- Does zscaler.com have an llms.txt file?
- Yes. zscaler.com serves a plain-text /llms.txt file (checked 2026-10-03).
- How can I check zscaler.com or my own site again?
- Use the free AI crawler checker at tools.yukai.uk/free/ai-crawler-checker (no sign-up). To check many sites and get alerts when rules change, use the AI Crawler Access Checker on Apify.
Similar .com sites
- googlesource.com No robots.txt
- capitalone.com Open
- newscientist.com Blocks some AI search
- nest.com Open
- simplisafe.com Open
- comodoca.com Open
- webs.com No robots.txt
- dalyfeds.com Open
- salesforce-scrt.com Blocks some AI search
- shazam.com Open
- incognia.com Open
- toutiao.com Open
All sites with an llms.txt · Which .com sites block GPTBot · What is zscaler.com built with? (Tech Stack Index) · Is zscaler.com hiring? (Hiring Index)