Domain Authority in 2026 Is Still Earned the Old Way

TL;DR#

• Winnow Labs went from a Domain Rating of 2 to 8 in about six months. No bought links and no keyword farms. Just writing and tools that make a confusing field easier to understand.
• It’s the old inbound playbook. Teach people first and sell to them second. It worked before brands switched to squeezing their customers, and it still works.
• AI agents read you before people do. Over the last 90 days, ChatGPT requested a Winnow page about 11,000 times while answering people’s questions. About 160 people clicked through from an AI assistant.
• The research platforms are central to the brand. New research often shows up years before anyone can responsibly make claims from it. The platforms let Winnow share that research without getting ahead of the evidence.
• If an AI agent doesn’t find your content worth reading, a person won’t either. Add something real to the conversation, and the authority follows.

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Last month I wrote about a wall of fake 42s in this site’s backlinks. Hundreds of throwaway domains, all linking to each other so a tool would score them the same. This month I have a smaller number to talk about, and I like it a lot more.

Winnow Labs makes a probiotic supplement, and I’ve been building their web platforms since March. In about six months, their Domain Rating in Ahrefs went from 2 to 8.

An 8 isn’t impressive on its own. But I also said last month that backlink scores move last, after everything else. So when one moves, the rest already did. And we got there without buying a single link or writing a page just to rank for a keyword.

What We Did#

Microplastics are a confusing subject. The headlines are scary and the studies are hard to read. Winnow decided the most useful thing it could do was help people make sense of it.

So there’s the Journal, where Winnow writes plain-language pieces about where microplastics come from and what the studies show, including where the evidence runs out. Posts cite primary sources. When the science doesn’t know something yet, the post says so.

And there’s the Research Atlas, a free, searchable index of more than 77,000 microplastics papers, most with a short plain-language summary. I wrote about how it gets built in July. Every two weeks, a research digest rounds up what’s new.

None of it is a sales pitch. There’s a link to the store, but nobody has to get past a pop-up or a sign-up wall to read anything.

The Old Playbook#

HubSpot made this idea famous in the late 2000s and called it inbound marketing. You attract people by teaching them something. They trust you because you were useful when you didn’t have to be. Some of them become customers, and the ones who don’t still tell their friends.

Somewhere along the way, a lot of brands lost the patience for that. Content turned into a trap. Gated PDFs, pop-ups before the first paragraph, articles written for a search engine instead of a reader. The goal turned into getting as much out of each customer as fast as possible.

That approach was always short-sighted. In 2026 it has a new problem. The first reader of your page is often an AI agent, and an agent can’t get past a sign-up form.

The Robots Read It First#

The sites we built for Winnow log every visit, including the bots. Over the last 90 days, ChatGPT requested a Winnow page about 11,000 times. Those requests come from ChatGPT answering people’s questions and deciding a Winnow page was worth opening.

In the same 90 days, about 160 people clicked through to Winnow from ChatGPT, Perplexity, Claude, Gemini and Copilot combined. Some apps hide where a click came from, so the real number is somewhat higher.

Even so, that gap is what search looks like now. A lot of your audience meets you through an agent. It reads your page, pulls out what’s useful, and answers the question. The person may never visit, and they may never learn your name. But the agent still had to pick your page out of everything it could have read, and specific, well-sourced pages give it a reason to.

If an AI agent doesn’t think your page is worth reading, a person won’t either. And agents can already write the generic version of most articles themselves.

The People Showed Up Too#

The human numbers are smaller, but they point the same way.

In April, search engines sent the Journal fewer than 20 visits. In September, they sent more than 500.

Google Scholar sends about 150 visits a week to Atlas paper pages. Scholar is where researchers look up papers. It now lists the Atlas as a place to read them, because each Atlas page carries the citation details Scholar uses to match it.

If I wanted a hockey-stick chart for this post, October has one. “Google” has sent the Atlas over 260,000 visits this month. It’s a scraper pretending to come from Google. Fake traffic is as cheap to make as fake links, and it’s worth just as little.

Taking It Further With Probiotics#

We’ve now pointed the same approach at probiotics. Winnow Probiotics is a public index of 508 probiotic strains, built from 221,000 papers. You can browse by strain, body system, symptom or taxonomy. Each strain page lists the papers behind it, so you can see how much research a strain really has and what kind.

Winnow wants to be a supplement company that works from the newest research. But new research often shows up years before anyone can responsibly make claims from it. Supplement companies can only say what the evidence supports, and that’s the right rule.

The research platforms let Winnow follow the science in public without getting ahead of it. They show you the studies and let you decide what they mean.

What I’d Tell Anyone Starting Now#

We did the technical basics. Sitemaps, an llms.txt file for AI tools, and citation tags so Google Scholar can read each paper page. That work matters, but any competitor can copy it in a week.

If you want domain authority in 2026, add something useful to the conversation. Data you gathered yourself, or a clear explanation of something people find confusing. Then make it easy for people and agents to read.

I don’t know where Winnow’s number goes from here. Domain Rating moves slowly, and 8 is still small. But we got it by being useful, and that’s the only way I’d want to get it.

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David Kerr is the founder of Kerrberry Systems. He builds custom software for businesses that want to own their systems, not rent someone else’s. Find him on LinkedIn or GitHub.