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B2B marketplace website: buyers and sellers

Buyers and sellers need different first screens, and a marketplace can fail when one person tries both. Find the route, email rule or empty category that stops each visitor.

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Why do B2B marketplace visitors sign up as neither a buyer nor a seller?

Buyers leave when prices sit behind an approval form with no status, and sellers leave when a sign-up asks for company details before they can see what a listing involves. A visitor who tries both routes can also hit a duplicate email, because the buyer and seller sign-ups do not know about each other. A simulated visitor shows which route blocked them, and what the site said at that point.

What this looks like in a report

Who
Samir, buys packaging for a catering company
How they arrived
Searched for a B2B marketplace for catering supplies and opened the first result
Where they stopped
Access request, after prices were hidden behind a form

“I cannot see one supplier in cups or a single price. The form wants company tax details and says someone will review me. I need cups by Friday, so I will buy from a distributor I can see.”

The fix. Show the category's supplier count and one sample listing above the access form, and list what the approval step will ask for before the form opens. Keep each access request's status visible on screen and in the confirmation email.

An illustration. Run a test to see your own.See a real sample report

The same email cannot be both a buyer and a seller

Some marketplaces build two sign-up paths, one for buyers and one for sellers, and the paths rarely check each other. A buyer who signs up first with a work email, then wants to list their own spare stock, meets a message that the email is already in use. The sign-up offers no way to add a seller role to that account. The visitor starts a second account with another address, or leaves. Each path looks finished on its own, so the fault appears only when one person walks through both. That is the walk a founder rarely repeats, because they already know how the accounts connect.

  • Does the home page show a clear route for buyers and one for sellers, both above the fold?
  • Can an email address that signed up as a buyer also sign up as a seller?
  • Does a category with no suppliers yet say so, and offer a next step?
  • Does an access request show its status, and what happens after approval?
  • Can a buyer see sample listings before any company details are asked?

Two front doors that do not know about each other

Start from the home page on a laptop, then on a phone, and read it as a buyer and then as a seller. The first screen may have one button, Get Started, that leads to a generic form with a role choice buried in it. A seller who reads the buyer wording may pick the wrong role and see a catalog they cannot use. A buyer who clicks For Suppliers may land on a page built to collect listings, with nothing that shows what a buyer sees. Walk each path once, then compare the two. If the two routes name the same things differently, a visitor who has used one will assume the other is a different site.

An empty category that looks like a dead site

A new marketplace can have suppliers in some categories and none in others. A buyer who searches for a product line with no listings sees an empty grid, and reads it as a site that does not work. A seller who arrives in the same category sees no buyers and does not sign up either. Search for a category you know is thin, the way a buyer would, and check what the page says. A plain line that names the gap and offers a request for a quote, or an alert when a supplier joins, keeps the visitor on the site. A blank grid with a footer link does not.

An approval queue with no status and no timeline

Some marketplaces hide prices until a buyer is approved, to protect supplier terms. That can be a sound rule. The problem is the screen after the request. A buyer submits company details, sees a line that says the team will review the request, and then has no way to tell whether it is in a queue or has been lost. The buyer cannot plan around that, so they buy somewhere else. Submit an access request with made-up company details, then look for a status screen and a confirmation email. If neither shows where the request stands, add both before you send any more buyers to the page.

What you get with Mimiq

  1. 01

    Run it by hand, or on every pull request

    Paste a link and a task in the app and watch the visitors work. Or run them on every preview deploy: the GitHub Action comments on the pull request, any other CI can call the MCP endpoint, and your coding agent can run it too.

  2. 02

    Bugs and usability problems in one report

    The browser records errors and failed or slow requests on the step they happened. The visitors say where the wording or the steps confused them, and where they left.

  3. 03

    Visitors that behave like your audience

    Each visitor is a different profile with a reason to be there, matched to who the page is for, described by you, or built from your own customers.

  4. 04

    A prompt to fix each problem

    Every problem comes with a fix to paste into Cursor, Claude Code, Lovable or any coding agent, and one prompt hands over the top problems at once. Then send the same visitors through again.

  5. 05

    Follow every visitor

    See each visitor's whole path, step by step with screenshots, and what it was thinking at every step. Ask any visitor a question.

The browser records relevant JavaScript errors and failed or slow app requests encountered during the run, attached to the step where they occurred. The visitors are simulated: they find problems, they do not predict how many real people will convert.

A new supplier category can open with no listings and no buyers

The first run shows which route blocked the visitor. The fix may be a shared account model, a plain message for an empty category or a status line on each access request. Run the same buyer and the same seller after you add a category, change the approval rules or open a new market. Repeat it before paid traffic goes to any category page, since a thin category is the first thing a new visitor sees.

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  • Where they left and why, with a fix to copy for each problem
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  • Test accounts and protected previews
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See a sample report

Questions

Does this tell me how many buyers or sellers will sign up?

No. Mimiq does not predict sign-up numbers, and it does not forecast how the two sides will balance. It shows the step where a simulated visitor stopped and the message the site showed there. Sign-up rates come from your own analytics and account data.

Can the test approve a buyer or a supplier?

No. The test can submit an access request and show what the site says afterward, but approval is your decision and happens outside the page. A test cannot tell you whether a company should be let in, so keep that call with your team.

Should I enter a real company's tax details in a test?

No. Use made-up company names and invented details, and never a real company's registration or tax number. A test visitor is not a real business, and the details should not leave your own records.

Can the test show whether I have enough suppliers in a category?

No. It shows what a visitor sees in each category with the listings you have today. Whether supply and demand are balanced in a market is a question for your own data and your conversations with buyers and suppliers.

Can a buyer request a quote from a listing without an account?

It depends on your site. If the quote form sits on a public page, the test can reach its confirmation. The test does not send the quote to a supplier, so check that the request arrives in the right inbox yourself.

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