What AI cites in 2026: 5 content types, and what a regulated firm can publish

For two years, advice about getting cited by AI has mostly been opinion. Now there is real data on what AI tools actually quote, and the answer is a little awkward for a regulated firm: the format cited most is the one your rules will not let you write about yourself. The good news is that the next two formats are wide open, and most firms are not writing them.

The research, in brief

• Meltwater (May 2026) analyzed 9.5 million citations in AI answers across 16 business categories and found LinkedIn among the most-cited sources. It then studied the 24 most-cited LinkedIn articles. Read the Meltwater study.
• Wix AI Search Lab (March 2026) analyzed 1,056,727 citations from ChatGPT, Google AI Mode, and Perplexity, and broke them down by content type and industry. Read the Wix study.

One honest caveat before the numbers: Meltwater's content-type split comes from those 24 top articles, mostly in business-to-business categories. Treat it as a strong signal of direction, not a law.

The five content types AI cites, ranked

Share of the 24 most-cited LinkedIn articles in the Meltwater study that used each format (an article can use more than one):

1. "Best X" lists, 54%. Ranked lists of companies or tools in a category.
2. Side-by-side comparisons, 50%. One option against another, with pros and cons.
3. "How to choose" guides, 33%. Criteria, red flags, and questions to ask before buying.
4. Educational explainers, 17%. Definitions and process walkthroughs.
5. Thought leadership with data, 8%. Opinion pieces, even with numbers attached.

The pattern is plain. AI tools cite content that answers a buying decision directly, because that is what people ask them. Opinion on its own rarely gets quoted.

What each type means for a regulated firm

"Best" lists: earn a place, do not write one. A law firm calling itself the best runs into state bar advertising rules, and an adviser runs into the SEC Marketing Rule's ban on unsupported claims. It turns out not to matter much: in professional services, Wix found that 80.9% of the cited lists were published by third parties, and only 19.1% were self-promotional. So the work is getting onto other people's lists: local business roundups, association and chamber directories, and industry rankings, with your firm's facts consistent everywhere.

Comparisons: write them, honestly. You can compare service models, fee structures, or approaches without claiming to be better. "Flat fee or hourly for an estate plan?" or "A concierge practice or a traditional practice?" are comparisons a client is already making. Keep claims supported and let the reader decide.

"How to choose" guides: the biggest open opportunity. A guide to choosing an estate planning attorney, a concierge physician, or a wealth manager is educational, compliant, and matches the question buyers type into AI. Most regulated firms have never written one.

Explainers and opinion: keep them, but add a decision. Most firm blogs are made almost entirely of these, the two least-cited formats. They still build trust; they just need a framework or a clear "what to do next" to be quoted.

How the most-cited articles are built

Meltwater's look at the top 24 articles found a consistent structure:

• All of them used bulleted or numbered lists.
• 92% used clear section headings.
• 75% named specific companies or tools.
• 67% included hard numbers.
• Most ran 1,500 to 2,500 words, with a median near 1,725.
• A typical order: introduction, criteria, ranked items, how to choose, then an FAQ.

Why your principals should publish, not just the firm

About 75% of LinkedIn citations in the Meltwater study came from individual member profiles, and only 25% from company pages. More than half came from members with fewer than 10,000 followers. AI tools are reading expertise, not reach. For a professional firm, that means a partner's or physician's own LinkedIn article can carry more weight than the firm's page, and a modest following is no barrier.

It also explains a pattern we see in local answers. When AI tools recommend help for wealth or law firms in Miami, they often cite firms that appear in roundups and articles written by others. Being mentioned is the job; your website is one of several places that has to say the same thing.

How to choose what to write next

1. List the five decisions your clients make before they call you.
2. For each, ask whether it is a "how to choose" question or an "A or B" question.
3. Write the guide or the comparison first, with criteria, real numbers where you can support them, and an FAQ.
4. Have compliance review it, then publish it on your site and as a principal's LinkedIn article.
5. Find three local lists or directories your firm should be on, and make sure your facts match on each.

To see how AI reads your firm today, start with the free AI Visibility Scorecard. For the plain-English basics, see What Is GEO, and for the rules regulated firms work under, What AEO Playbooks Miss.