4 resources from Learning Loop we point founders to, and the questions each answers.
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Why we picked it
Before you write a line of code, you can test whether a marketplace has a pulse by matching the first buyers and sellers yourself, over a form, a spreadsheet, and WhatsApp. This lays out the concierge method plainly: personally deliver the service, record every request, and watch whether people come back and pay. It is the cheapest way to learn if there is real demand before you spend months building a platform nobody needed.
Manually match 5 to 10 real users through a form or spreadsheet instead of building software: you are testing demand, not scale.
Track willingness to pay, repeat requests, and drop-off points, because those signals tell you if a marketplace is worth building.
It differs from Wizard of Oz testing: here users know a human is helping, which is exactly what lets you have the direct conversations that reveal what people actually value.
Why we picked it
For B2B founders, a signed letter of intent is the cheapest way to turn "this sounds useful" into a costly commitment before you write any code. This piece lays out the LOI as one rung on a commitment ladder (say, LOI, contract, payment) and is honest that an LOI is a signal, not a guarantee. It gives you concrete language and structure rather than just theory.
Why we picked it
A clean, practical playbook for the mechanics: where to place the door, what to measure, and how to avoid annoying the people who walk through it. It covers the in product version (a button for a feature you have not built) alongside the standalone landing page, so you see both shapes of the test. Good for turning the concept into a concrete plan you can ship this week.
Why we picked it
A structured how-to you can follow, covering when to run a Wizard of Oz test, the steps, the tools, and the pros and cons. Treat it as a checklist so your experiment produces a clear answer instead of a vague feeling. Useful the moment you move from reading about the idea to actually setting one up.
