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Case File Archive

Case Studies & Research

Original research from our database of over a million US small business websites, plus the real decisions behind how Stackra is built. Every finding gets stress-tested, and we show our work instead of hiding it in a footnote.

Published Study11 min readJuly 10, 2026

Do Backlinks Actually Drive Traffic? We Tracked 5 Million Websites to see

Everyone selling SEO says the same thing: get more links pointing to your site and more visitors will follow. We checked three years of data on whether that is actually true, across more than five million websites. Links and visitors do go together. But which one causes the other turned out to be the opposite of what the pitch promises.

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Published Study9 min readJuly 5, 2026

Does a CRM Actually Help Your Website's Authority? We Checked 1.1 Million Small Businesses

A lot of SEO advice tells you to add special tags to your website's code. We looked at 1.1 million small business websites and found those tags barely made a difference. The thing that actually lined up with a stronger website in every industry we checked: whether the business used a tool to keep track of and follow up with its customers.

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Featured
Case File10 min readVerified

Do Startup Directories Actually Work?

We pulled the receipts on two 'submit your startup' directories: who they link to, what kind of link it actually is, whether the listed sites are even real, and what happens to members after they join. No surveys. No self-reported growth. Public crawl data, checked twice.

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Case File8 min readVerified

How Stackra Made a React App Visible to AI Without Next.js

AI tools like ChatGPT could not actually read our pages, so we were invisible to them. The usual fix is to rebuild your whole site on a different setup, which takes weeks. We found a much smaller fix instead. Here is the story, the numbers, and how to decide what is right for your own site.

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Case File9 min readVerified

How We Built Our Keyword Strategy for Under $20 with DataForSEO

Most small business owners think real keyword research means paying $99 to $200 every month for an SEO tool. It does not. We built our entire keyword list, all 4,842 of them, for under $20 total using a pay-as-you-go tool. In the 18 days after, the number of searches we show up for on Google jumped from 7 to 27. Here is the proof, then the exact steps you can copy.

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Case File5 min readVerified

We Sorted 1.1 Million US Business Websites by Category. Here's the Map.

The shape of the US business web, measured. Real business sites broken down into 25 categories and 483 subcategories. Retail and restaurants are more than a quarter of it, SaaS barely registers, and the whole thing skews local and physical. Here is the full breakdown, how a site earns a US label, and how we checked the labels before trusting them.

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Case File6 min readVerified

We Tracked 1.1 Million US Business Sites Across Three Years of the Web Graph. Local Businesses Are Sliding Toward the Edge.

Three years of Common Crawl webgraphs (7.9 billion link edges), every domain in our 1.1M-site US corpus, four separate metrics. The pattern is consistent: link authority is draining out of local business categories toward digital-native ones, and for every site that climbed meaningfully, ten declined. What business category you're in turns out to predict your trajectory, right down to the subcategory.

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