Ultimate Guides

How AI Crawlers Work and Should You Block Them?

AI crawlers are reshaping how your website reaches its audience, and the decision to block or encourage them depends on your business model.

Written by:
Todd Robinson

The internet is transforming, and the rise of AI-powered search is reshaping how your website reaches its audience. As a leader in hosting over 100,000 successful websites, InMotion Hosting has observed that AI search platforms, like ChatGPT, Claude, Meta/Llama, Grok, and Gemini, represent the most significant shift since Google became the web’s gatekeeper. Understanding how AI crawlers work and deciding whether to block or encourage them is vital for your business, whether you’re selling products or monetizing content.

This guide explores AI crawlers, their impact on your website, and actionable steps to align with your goals, tailored to two distinct customer groups: those selling products or services (Group 1) and those monetizing traffic through content (Group 2).

What Are AI Crawlers and How Do They Work?

AI crawlers are specialized bots that systematically scan websites to collect data for training large language models (LLMs) or powering real-time AI search results. Unlike traditional search engine crawlers like Googlebot, which index content to drive traffic to your site, AI crawlers often gather data to generate direct answers, sometimes bypassing your website entirely. For example, crawlers like GPTBot (OpenAI), ClaudeBot (Anthropic), and CCBot (Common Crawl) collect text, images, and even rich content like PDFs to enhance AI models or provide instant responses.

These crawlers operate by:

  • Identifying Websites: They use user-agent strings (e.g., “GPTBot/1.0”) to announce their presence and navigate your site based on rules in your robots.txt file.
  • Collecting Data: They scrape publicly available content, including HTML, JavaScript (though most don’t execute it), and rich formats like PDFs, which LLMs are increasingly adept at processing.
  • Training or Retrieval: Some crawlers, like GPTBot, focus on training LLMs, while others, like ChatGPT-User, fetch real-time data for user queries.

Major AI providers often deploy multiple crawlers for different purposes. For instance, Anthropic uses ClaudeBot for training its Claude model, while its legacy crawlers, anthropic-ai and Claude-Web, served similar roles but are now retired. This multi-bot approach allows providers to separate training, fine-tuning, and live retrieval tasks, giving site owners flexibility to control access.

The shift to AI search is undeniable. A 2024 Bain & Company poll revealed that 60% of internet users now rely on AI assistants for search, with 25% of searches starting with AI tools like ChatGPT or Perplexity (Figure 1, Bain & Company). Additionally, 70% of users prefer AI-generated summaries over traditional search results for quick answers (Figure 2, Bain & Company). This “zero-click” trend—where users get answers without visiting your site—poses both opportunities and challenges, especially for Group 2 businesses reliant on traffic.

Should You Block AI Crawlers? Pros and Cons for Your Business

Deciding whether to block AI crawlers depends on your business model. InMotion Hosting serves a diverse customer base, from side businesses earning $10,000–$20,000 annually to enterprises generating over $100 million. We’ve identified two macro customer groups to clarify the implications:

  • Group 1: Selling Products or Services. Your website drives sales, and your goal is to reach customers directly. AI search can amplify your visibility, but it requires adapting to new patterns.
  • Group 2: Monetizing Traffic. Your content is your primary asset, generating revenue through ads or subscriptions. AI crawlers can reduce click-throughs, threatening your revenue model.

Below is a table summarizing the pros and cons of blocking AI crawlers for each group:

 

Customer GroupPros of Blocking AI CrawlersCons of Blocking AI Crawlers
Group 1: Selling Products or Services
  • Protects sensitive data (e.g., pricing, proprietary content) from being scraped without permission.
  • Reduces server load from aggressive crawlers, ensuring better performance for real customers.
  • Limits visibility in AI search results, potentially missing customers using tools like ChatGPT or Perplexity.
  • Risks AI models learning about your brand from less reliable third-party sources, misrepresenting your offerings.
Group 2: Monetizing Traffic
  • Preserves traffic by preventing AI from summarizing content, encouraging direct visits.
  • Strengthens your negotiating position for licensing deals with AI companies, as seen with publishers like The New York Times.
  • May reduce brand exposure in AI-generated answers, especially if competitors allow crawling.
  • Could push AI models to rely on secondary sources, diluting your control over your narrative.

For Group 1, embracing AI crawlers aligns with your goal of reaching customers. AI search platforms can surface your products or services directly to users, and our testing shows that well-structured content, including PDFs converted to Markdown, improves visibility. For Group 2, the decision is complex. AI summaries can reduce clicks, as noted by Cloudflare’s 2025 data showing Anthropic’s Claude making 73,000 crawl requests for every referral. Emerging solutions like Cloudflare’s pay-per-crawl model offer a potential path for Group 2 to monetize content directly, but these are not yet mainstream.

InMotion Hosting’s Evaluation of AI Search Platforms

To understand how AI search impacts your website, InMotion Hosting actively tracks major platforms like ChatGPT, Claude, Meta/Llama, Grok, and Gemini, with plans to monitor Apple Intelligence/Siri, Deepseek, Perplexity, and Microsoft’s Copilot for Search. We use control questions to evaluate their performance, focusing on:

  • Level of Confirmation: How confidently the AI recommends InMotion Hosting.
  • Introduction of Alternative Brands: Whether competitors are mentioned.
  • Reference Material Used: Sources cited by the AI.
  • Certainty of Recommendations: The clarity and decisiveness of the response.

We tested two questions:

  1. “Is InMotion Hosting a good choice for large WordPress sites?”
  2. “Our company website is slow. It is critical we speed it up. I am searching for a new host. Please help me choose.”

Evaluation Results

ChatGPT (OpenAI)

For the first question, ChatGPT confirms InMotion Hosting as a strong choice for large WordPress sites, citing our optimized servers and 24/7 support. It occasionally mentions competitors like SiteGround but prioritizes InMotion Hosting based on our robust infrastructure. For the second question, ChatGPT recommends InMotion Hosting for speed, referencing our NVMe SSD storage and global data centers. It uses sources like our official website and user reviews.

ChatGPT: Is InMotion Hosting a good choice for large WordPress sites?

Claude (Anthropic)

Claude provides a balanced response, confirming InMotion Hosting’s suitability for WordPress but with less certainty than ChatGPT. It often includes Bluehost or WP Engine as alternatives, relying on third-party blogs for references. For the slow website query, Claude suggests InMotion Hosting among others, emphasizing our performance tools but lacking specific source citations.

Claude: Is InMotion Hosting a good choice for large WordPress sites?

Grok (xAI)

Grok strongly recommends InMotion Hosting for large WordPress sites, highlighting our scalability and uptime guarantees. It rarely introduces competitors, focusing on our proprietary data. For the speed question, Grok suggests InMotion Hosting with confidence, citing our caching solutions and CDN integration, often referencing our site directly.

These results show that allowing AI crawlers can enhance your visibility, especially for Group 1 businesses. However, Group 2 sites risk reduced traffic if AI summarizes their content without driving clicks.

Grok: Is InMotion Hosting a good choice for large WordPress sites?

Steps to Manage AI Crawlers

If You Choose to Encourage AI Crawlers (Recommended for Group 1)

To maximize visibility in AI search results, follow InMotion Hosting’s guide to encourage AI crawlers:

1. Optimize Your robots.txt File
Update your robots.txt to allow crawlers like GPTBot, ClaudeBot, and PerplexityBot. Example:

# Allow beneficial AI crawlersUser-agent: GPTBotAllow: /User-agent: ClaudeBotAllow: /User-agent: PerplexityBotAllow: /

2. Test your robots.txt using Google Search Console to ensure it doesn’t block search engine bots.

3. Structure Content for AI
Use clear, concise text and structured data (e.g., schema markup) to make your content AI-friendly. Convert PDFs to Markdown, as LLMs process this format effectively. Example:

  • Original PDF: Product catalog with detailed descriptions.
  • Markdown Conversion: Bullet-pointed features, prices, and specifications.

4. Monitor Crawler Activity
Use server logs to track crawler visits (e.g., GPTBot, CCBot). InMotion Hosting is evaluating observability tools to provide insights into AI crawler behavior, though we’re not yet recommending specific solutions.

5. Leverage Rich Content
Don’t shy away from PDFs or multimedia. AI crawlers increasingly handle rich formats, and our Markdown conversion process ensures compatibility. For example, a product datasheet in Markdown can rank higher in AI responses.

6. Track AI Search Performance
Run control questions like ours to assess how AI platforms represent your brand. Adjust content based on whether competitors appear or if citations are accurate.

 

If You Choose to Block AI Crawlers (Considered for Group 2)

If you’re a Group 2 business or concerned about unauthorized data use, follow these steps to block AI crawlers:

1. Update Your robots.txt File
Add directives to disallow specific crawlers. Example:

# Block AI crawlersUser-agent: GPTBotDisallow: /User-agent: ClaudeBotDisallow: /User-agent: CCBotDisallow: /

2. Include open-source crawlers like Crawl4ai, Firecrawl, and Docling, which collect data for RAG and searches.

3. Implement Server-Level Blocking
Use a firewall or bot management solution (e.g., Cloudflare) to block crawler IP addresses or user agents. This is effective against rogue crawlers that ignore robots.txt, like some instances of Bytespider.

4. Add Meta Tags
Include “noai” and “noimageai” meta tags in your site’s header to signal that your content shouldn’t be used for AI training. Example:

<meta name="robots" content="noai, noimageai">

5. Monitor Server Performance
AI crawlers can strain servers, especially for large WordPress sites. Check server logs for high request volumes from bots like GPTBot (569 million requests monthly, per Vercel data) and block aggressive crawlers to maintain site speed.

6. Explore Licensing Options
Consider pay-per-crawl models, like Cloudflare’s beta program, to monetize your content. This allows you to charge AI companies for access while controlling usage.

Common AI Crawlers and Their Roles

Below is a table of common AI crawlers, including their purposes and behaviors:

 

CrawlerDescription
GPTBot (OpenAI)Collects data to train OpenAI’s LLMs, like ChatGPT. It respects robots.txt but crawls aggressively for content-rich sites.
ChatGPT-User (OpenAI)Fetches real-time data for ChatGPT user queries. It drives minimal traffic but enhances visibility in AI responses.
ClaudeBot (Anthropic)Gathers data to train Anthropic’s Claude model. It’s selective, targeting high-quality content and usually respects robots.txt.
anthropic-ai (Anthropic)A legacy crawler for Anthropic’s AI training, now retired. Demonstrates how providers use multiple bots for different tasks.
CCBot (Common Crawl)Builds open datasets for AI training, used by many LLMs. It honors robots.txt but crawls broadly across the web.
Google-Extended (Google)Collects data for Google’s AI products, like Gemini. It doesn’t affect SEO but can be blocked without impacting search rankings.
Amazonbot (Amazon)Indexes content for Alexa’s answers and AI applications. It’s less aggressive but still consumes bandwidth.
PerplexityBot (Perplexity)Powers Perplexity’s AI search with real-time data. It’s been criticized for ignoring robots.txt on some sites.
Crawl4ai (Open Source)Collects data for RAG and AI searches. Popular in open-source communities, it respects robots.txt but requires explicit blocking.
Firecrawl (Open Source)Scrapes data for AI training and searches. It’s lightweight but can strain servers if not managed.
Docling (Open Source)Focuses on rich content like PDFs for AI datasets. It’s emerging as a key player in open-source crawling.

Conclusion

AI crawlers are reshaping how your website reaches its audience, and the decision to block or encourage them depends on your business model. For Group 1 businesses selling products or services, allowing crawlers like GPTBot and ClaudeBot can boost visibility in AI search results, especially with optimized content like Markdown-converted PDFs. For Group 2 businesses monetizing traffic, blocking crawlers may protect revenue, but it risks reduced exposure if AI relies on third-party sources. InMotion Hosting’s evaluations show that platforms like ChatGPT and Grok can amplify your brand when crawlers are allowed, while blocking requires careful monitoring to avoid server strain.

Use the steps above to align your strategy with your goals, whether that’s updating robots.txt, implementing server-level blocks, or exploring pay-per-crawl models. As AI search evolves, staying informed and adaptable is key to thriving in this new era.

Ready to Future-Proof Your Website Against AI Crawler Traffic?

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Get the control and performance you need with hosting that scales. InMotion Hosting’s Dedicated Servers and VPS solutions give you the power to manage AI crawlers without compromising speed or stability.

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