Linkbuilding in the AI Era: More Important Than Ever

With the rise of ChatGPT, Perplexity, and Google AI Overviews, a persistent rumor circulates in the SEO scene: backlinks are dead. Generative models would learn content directly from texts and ignore link structures. The reality is different. Backlinks are not only still relevant, but they are even more important than ever in the AI era. Anyone who wants to appear in the answers of the major language models cannot do without a strong link profile.

The Underestimated Chain: Backlinks to ChatGPT Citations

The effect of backlinks in the AI era can be described as a closed causal chain. At the beginning are high-quality, topic-relevant links from the open web. These backlinks strengthen a domain's authority and lead to better rankings in Google. Better Google rankings, in turn, increase the likelihood that content will end up in the training data and live retrieval sources of AI models. Models like ChatGPT, Claude, or Gemini explicitly rely on search results for research, supplemented by their own crawlers. Without a link profile, there is no visibility; without visibility, there is no mention.

This chain is not speculative. A study by SE-Ranking from 2025, which analyzed around 129,000 domains and their ChatGPT citation frequency, shows a clear correlation: The number of referring domains is the strongest individual factor for the likelihood of being cited by ChatGPT. Websites with over 350,000 referring domains receive an average of 8.4 mentions per topic area, while pages with fewer than 2,500 referring domains only achieve 1.6 to 1.8 citations. The difference is not gradual; it is five times greater.

Why the Myth of the Dead Backlink Persists

The belief that AI makes backlinks unnecessary is based on a misunderstanding of how language models work. It is true: An LLM understands the content of an article even if no one links to it. But an LLM needs two conditions to even know a source. First, the content must have been accessible during training or in live retrieval. Second, the algorithm must assess the source as trustworthy enough to cite it instead of paraphrasing. Both conditions are significantly influenced by classic SEO signals, foremost by backlinks.

Additionally, next-generation AI responses, such as Google AI Overviews or Perplexity, pull their sources in real-time from the index. Those who rank high there are more likely to be cited. And those who rank high there usually have a strong backlink profile. The supposed change is therefore not a disruption but a confirmation: Linkbuilding remains the foundation upon which all other measures are built.

Backlinks are not less valuable in the AI era; they have gained a second channel of effect. They not only rank you in Google but also bring you into the answers of ChatGPT.

What the SE-Ranking Study Specifically Means

The numbers from the SE-Ranking study leave little room for interpretation. If you run a domain today with only a few thousand referring domains, you will hardly appear in AI answers. Only from a critical mass of link profile depth does the citation frequency increase significantly. This does not mean that you need 350,000 domains to become visible at all. But every additional high-quality link brings you closer to the thresholds at which AI systems perceive you as a reliable source.

It is important to note the quality of the domains, not their absolute number. A link from a topic-relevant specialist publication has many times the effect of any generic Web 2.0 mention. Language models weigh sources similarly to Google: Trust, topic authority, and link structure determine whether a domain name appears as a reference at the end of an answer or not. Therefore, linkbuilding must be understood today more than ever as a strategic discipline, not as a mass business.

Practical Consequences for Your Strategy

What does this mean for your linkbuilding strategy specifically? First: Keep your budget high or expand it. Anyone who wants to be visible in AI answers over the next two years must invest in domain authority now. It is a costly truth that short-term savings on the link budget will cost visibility in the medium term, which does not show up in any quarterly report but slowly and inexorably reflects in declining inquiries. Second: Focus on industry relevance rather than pure domain authority. A link from the leading industry magazine in your niche is more valuable than ten nonspecific links from news aggregators. Third: Systematically build data assets that will naturally attract links. Studies, tools, and original research are particularly effective in the AI era because LLMs prefer original sources, and editors appreciate figures that they would otherwise have to painstakingly research themselves.

Fourth: Pay attention to the narrative context of your backlinks. A link from the body text of a thematically relevant article signals more relevance to language models than a footer link. And fifth: Maintain your existing links. Lost backlinks or broken target pages cost you twice, once in Google ranking and once in AI visibility. A quarterly link profile audit uncovers lost or damaged connections and is one of the most underestimated measures overall. Linkbuilding is not a discipline on the sidelines in 2026, but the central lever for organic reach, both classic and generative.

Think Strategically About Linkbuilding Rather Than Tactically

The most important insight from the current data is: Linkbuilding is a strategic investment in the AI era, not a tactical measure. Those who approach the topic with short-term thinking today lose twice. Real impact unfolds only after months, sometimes years of consistent work. This is also the good news: Those who start now are building a lead that competitors cannot catch up to in a few weeks. Backlinks are an asset with a long half-life. In a world where content becomes interchangeable because AI generates it, this half-life is your competitive advantage. Brands that systematically invest in industry-relevant link profiles today will still benefit from it in five years, while interchangeable text production will be devalued within a few quarters.

Linkbuilding is the ticket to the AI answer machines of the future. Those who ignore this will become invisible.