Should you block AI crawlers from your site?

The instinct to block is understandable and the reasoning usually transfers badly from a different business model. Publishers whose product is the content itself have a genuine grievance: an answer that reproduces their reporting removes the visit that funded it, and blocking is a rational defence of the thing they sell. A service business is in the opposite position. Its content is not the product; it is the advertisement for the product, and the objection to it being reproduced is much weaker.

What blocking achieves for such a business is narrow and mostly unwanted. The questions people ask about your industry, your area and your kind of work continue to be asked and continue to be answered. Blocking removes you from the pool of possible sources for those answers. It does not remove the answer, and it does not remove your competitors from it. You have withdrawn from a contest that carries on without you.

Against that sits a real concern worth taking seriously rather than dismissing: crawling costs bandwidth, some crawlers behave badly, and a business may reasonably object on principle to its material being used to train systems it did not consent to. Those are legitimate and they are separable. Crawl load is addressable with rate limiting rather than exclusion. Training and answering are frequently distinguishable by crawler, since several operators publish separate agents for each and honour rules that apply to one and not the other — which means the position of allowing retrieval while refusing training is often expressible rather than hypothetical.

That distinction is where a considered policy usually lands, and it needs checking rather than assuming, because the agent names and the operators' stated behaviour change. The durable version of the position is: permit crawlers that fetch in order to answer questions and cite sources, restrict those whose stated purpose is bulk collection for training, and rate-limit anything that misbehaves. Implementing it requires reading the current documentation of the operators that matter rather than copying a blocklist from a forum post, because a copied list goes stale in both directions.

There is a partial-blocking mistake worth avoiding. Businesses sometimes allow crawling of a homepage and block the sections that contain the actual substance — pricing, service detail, case material — which produces the worst available outcome: the site is present but has nothing extractable, so it is passed over in favour of a competitor who published detail. If the decision is to participate, the pages carrying the facts are exactly the ones that must be reachable.

The honest summary is that this is a business-model question rather than a technical one. If people pay you for access to what you publish, blocking is worth serious consideration. If what you publish exists to bring you enquiries, blocking removes a distribution channel and protects nothing you were selling.