SaaS idea validator

Most ideas fail for reasons visible before any code is written. Finding them costs an hour; not finding them costs a year.

Interrogate in this order

Problem. Who has it, how often, and what does it cost them today? An idea survives this only if you can name a specific person and what they currently do instead. "Businesses struggle with X" is not a problem statement — it is a category.

The strongest signal is a workaround: someone has built a spreadsheet, hired a contractor, or strung tools together to survive this. Paid workarounds are validated demand.

Market. Who exactly, and how many, and can you reach them? A large market you cannot address cheaply is smaller than a narrow one you can. Ask specifically: where do these people already gather, and what would it cost to reach a hundred of them this month?