4 in 10 B2B Software Companies Have No Written Case Study: 2026 Data

The direct answer: 39.0% of B2B software companies (372 of 954 we crawled) have no written case study on their site at all. That splits into 21.5% (205) with no customer proof of any kind and 17.5% (167) that rely on video testimonials with no written companion. We crawled 1,000 B2B software companies across 55 categories on 2026-08-21 specifically to measure this, rather than repeat an older survey number. The gap is worse in some categories than others: IT, dev and security software is the least likely to have anything written, at 48.4%.

This is first-party data from The Customer Proof Index 2026, our own crawl of 1,000 B2B software companies. Every number in this post traces back to that report and its methodology. We are not citing anyone else's survey here.

Why we ran our own crawl instead of citing an existing statistic

Every "X% of B2B companies use case studies" number we went looking for traced back to a vendor's own claimed customer count, a marketing survey with an undisclosed sample, or another blog citing one of those two. We could not verify any of them against a primary source, so instead of repeating an unverifiable number, we built a crawler and counted 1,000 real company websites ourselves.

That is why every figure in this post carries an explicit sample size: 954 companies for the existence numbers below, 335 for anything about what is inside the stories (covered in our companion post on case study quality). If a statistic does not carry both a sample size and a date, it is not verifiable, and we would rather publish a smaller, honest number than a bigger, borrowed one.

How we measured "no written case study"

We crawled the homepage, navigation, and footer of 954 reachable B2B software companies (46 more had an unreachable homepage at crawl time and are excluded from every number here), sourced from 55 SaaSHub category listings. For each company, we looked for a real case study or customer story page, not a testimonial wall of one-line blurbs, and classified what we found into exactly one of three states.

Read the last row carefully. "Has written proof" at 61% sounds like a clear majority, and it is. But 39% of B2B software companies, close to 2 in 5, have nothing a search engine, an AI answer engine, or a buyer doing quiet due diligence can actually read.

Video-only is its own category, not partial credit

We kept video-only proof (17.5%, 167 companies) separate from "nothing" on purpose, because it is a different failure mode, not a smaller version of the same one. A company with a video testimonial has clearly done the work of getting a customer to say something positive on camera. What it has not done is turn that into something a search engine can index, an AI assistant can quote, or a rep can paste into a cold email without a customer having to click play first. Video and written proof answer different moments in a buyer's process, and 1 in 6 companies in our sample are covering only one of them.

Which B2B categories are worst for written proof?

We grouped the 55 categories we crawled into 7 broader groups and measured the same "nothing written" rate inside each one.

The spread is wide. A company selling CI/CD tooling, endpoint security, or a password manager is roughly 1.6x as likely to have nothing written as a company selling HR software. Neither group is small (221 companies in IT, dev & security versus 91 in HR & people), so this is not a sample-size artifact. See the full methodology for the exact category-to-group mapping and how the sample was built.

Our own read on why: IT, dev and security buyers are often assumed to be self-serve technical evaluators who read documentation and run a trial rather than people who read a customer's story. That assumption is probably wrong often enough to be an opportunity. A technical buyer still has to justify the purchase to someone else, and "here is a team like yours, here is what changed after they adopted this" is exactly the artifact that internal justification needs.

The 61% headline is the wrong number to optimize

Coverage inside your own category matters more than the aggregate figure across all of B2B software. If most of your direct competitors have nothing written, as in IT, dev and security where fewer than half do, one well-built case study does more competitive work for you than the same case study would in HR software, where the field already clears 69% with something written. Check where your category sits in the table above before deciding how urgent this is.

Why this gap matters more now than it did two years ago

A case study used to compete for one thing: a human reader's attention on your website. It now competes for two: that same human, and every AI answer engine a buyer might ask instead of searching. ChatGPT, Claude, and Perplexity cannot cite a video testimonial. They cannot cite a case study that only renders after a script runs in the browser, which is a separate gap our methodology describes in more detail. They can only cite text that was already sitting in the page's HTML when they read it. A written case study is no longer just marketing collateral for a human visitor; it is one of the few pieces of B2B content genuinely built for the format an AI answer engine wants to quote back to a buyer who asked it a comparison question.

This does not require you to trust an unverifiable adoption number. It is a structural fact about what these systems can and cannot read, and it applies to your slice of the 39% gap whether or not you ever measure a citation effect directly.

A note on what this data does and does not cover

This describes 954 B2B software companies listed across 55 SaaSHub categories, not "all B2B software companies." SaaSHub is a real, broad directory, but it is one directory's curation, and a company that does not maintain a listing there is not in our sample. We also cannot see anything a proof page renders client-side after the page loads, which means the true "nothing written" rate is more likely lower than 39% than higher: a real case study that only appears after JavaScript runs would look empty to our crawler, not exempt from it. Read the full methodology before treating this number as a benchmark for any specific company outside our sample.

Does having proof mean it is good proof?

No, and this is the part the 61% headline hides. Among the 335 companies in our sample where we could actually open a real story, 10.7% contain no number anywhere in any story we sampled. We measured that separately, in Only 1 in 10 Published Case Studies Has a Number In It, because "do you have a case study" and "is your case study any good" turned out to be two different questions with two different answers. A company can clear the bar in this post and still fail the bar in that one.

What to do about it

If you have zero written case studies, you are one of 205 companies in exactly this position. Start with one. Pick the customer you already have the best relationship with, not necessarily your biggest logo. A short customer interview produces more usable material than a blank document and a "could you write up your experience" email ever will.

If you only have video testimonials, you are one of 167 companies here. Video does not get indexed by Google, quoted by an AI answer engine, or pasted into a sales email. A written companion built from the same conversation as your strongest video closes that gap without asking the customer for a second favor.

If you sell IT, dev, security, finance, or operations software, your category is behind its peers by a wide margin (31% to 48% have nothing written across the 7 groups above). That is a bigger opportunity than it is an excuse: less competition for a buyer's attention on the exact page type they need before a purchase they have to justify internally.

If you already have written proof, check whether it actually contains a number. We measured that separately, and the honest answer for 1 in 10 companies with a case study is no.