What Is an AI Crawler?
An AI crawler is an automated web crawling bot operated by an AI company that systematically visits websites to read and collect their content. Unlike traditional search engine crawlers such as Googlebot, which primarily build a searchable index for ranking web pages, AI crawlers serve additional purposes: collecting data for training AI language models, building real-time retrieval databases that power AI-generated search answers, or both.
Each major AI company operates its own crawler with a distinct user agent name. OpenAI uses GPTBot for model training and OAI-SearchBot for real-time retrieval. Anthropic operates ClaudeBot. Perplexity AI uses PerplexityBot. Google's AI systems use Googlebot alongside a newer GoogleExtended agent. Microsoft's Bing crawler, Bingbot, also feeds into Copilot and related AI products. Publishers can allow or block any of these crawlers individually using the standard robots.txt protocol.
AI crawlers are broadly divided into two functional types. Training crawlers collect large volumes of web content to be used in building or fine-tuning language models. Retrieval crawlers operate in near-real-time to fetch fresh content that AI search tools can cite in generated answers. For South African businesses, retrieval crawlers are particularly relevant because they determine which websites appear as sources in AI-generated responses to user queries.
The relationship between AI crawlers and SEO is evolving. Content that is well-structured, authoritative, and accessible to crawlers has a higher chance of being indexed by AI retrieval systems and subsequently cited in AI-generated answers. Blocking AI crawlers means your content will not appear in those answers, which may represent a missed visibility opportunity for many businesses.
AI Crawler In Practice
The scenario below is an illustrative example, not a Juicy Designs client result. The outcomes described indicate the kind of effect that AI crawler management typically produces, so treat them as indicative rather than measured.
Imagine a Pretoria-based legal firm that notices in its server logs that several user agents it does not recognise are regularly crawling the website. A closer look at the log entries would typically show that these include GPTBot, PerplexityBot, and ClaudeBot. The firm's digital marketing team would then need to assess whether to allow or block these crawlers.
For general practice pages covering areas like employment law and conveyancing, the firm might decide to allow all AI crawlers, recognising that being cited in AI-generated answers when South Africans ask legal questions is valuable brand exposure. For a private client portal section of the site, it could add specific disallow rules in robots.txt for each AI crawler's user agent, ensuring that gated and confidential content is not collected.
This selective approach, allowing AI crawlers on public-facing authoritative content while restricting access to sensitive or proprietary areas, represents best practice for most South African businesses. Adding an llms.txt file alongside appropriate robots.txt rules gives AI systems both the permission and the guidance they need to represent a firm accurately in generated answers.
How AI crawlers work
An AI crawler is a bot used by an AI company to gather web content, either to train models or to fetch current information when answering questions. They work much like search-engine crawlers, requesting pages and following links, but serve AI systems rather than a search index. Different companies run named crawlers: OpenAI uses GPTBot and OAI-SearchBot, Anthropic uses ClaudeBot, Perplexity uses PerplexityBot, and Google uses Google-Extended for its non-Search AI. Some fetch pages in real time to ground an answer and may cite the source; others gather content for training. Because these crawlers determine whether your content can be used and cited by AI tools, understanding and managing their access is part of preparing a site for AI-mediated discovery.
Managing AI crawler access
You control AI crawler access mainly through robots.txt, which lets you allow or disallow each named user agent. For most businesses seeking visibility in AI answers, the goal is to allow reputable AI crawlers, so your content can be used and, where the crawler supports it, cited back to you. Blocking them opts out of that visibility, which some publishers choose to protect content from training, a genuine trade-off between reach and control. It is worth distinguishing purposes: Google-Extended governs Google's AI training and grounding, separate from Googlebot, which handles appearance in Search AI features like Overviews. Decide deliberately per crawler, and remember that allowing a crawler permits access but does not guarantee citation, which still depends on your content being clear, specific and trustworthy.
FAQ
Can I block AI crawlers from my website?
Yes. You can block specific AI crawlers by adding their user agent names to your robots.txt file. For example, adding 'User-agent: GPTBot' followed by 'Disallow: /' will prevent OpenAI's crawler from accessing your site. Each AI crawler has its own user agent identifier that can be blocked independently.
Should South African businesses allow AI crawlers on their websites?
For most South African businesses, allowing AI crawlers is beneficial because it increases the chance of being cited in AI-generated answers. However, businesses with proprietary content, subscription-gated material, or privacy concerns may choose to block specific crawlers while allowing others that power AI search tools.
Should you allow AI crawlers on your website?
For most businesses wanting visibility in AI answers, yes, allowing reputable AI crawlers lets your content be used and potentially cited. Block them only if you have a specific reason to withhold content from AI training or answers. It is a trade-off between reach and control, decided per crawler.
Can you block AI crawlers?
Yes, through robots.txt, by disallowing the named user agents such as GPTBot, ClaudeBot, PerplexityBot and Google-Extended. Compliant crawlers respect these rules. Blocking opts your content out of AI use and citation, so weigh the loss of visibility against the reason for withholding.