Free SaaS idea refiner · Solo founders

Validate and sharpen your SaaS idea in 3-5 questions.

Free, conversational, no signup. Built for solo founders who have a rough startup idea and need it tight enough to actually find buyers. We ask short, idea-specific questions and rewrite the prompt as you answer. 2 sessions per day per IP.

What founders use a free SaaS idea validator for

Pressure-test a hunch before writing code. If we can't surface a clear audience and pain in 5 turns, neither can your future users.
Sharpen the prompt that finds your buyers. A vague query pulls noise. A sharp one pulls posts you can actually reply to.
Pull better landing copy. The refined prompt usually surfaces the exact phrasing your buyers use — paste it onto your hero.
Decide whether to keep building. 5 turns of refinement and still fuzzy? That's a signal to talk to humans before adding more code.

What this tool does (and doesn't)

Does: mirrors the iterative refine step from the open-source Gorilla repo (supabase/functions/refine/index.ts). Asks one short, idea-specific question per turn (with 3 concrete options + free text), maintains a running refined prompt, and stops when the prompt is search-ready or after 5 turns.

Doesn't: hit Reddit, X, YouTube, or TikTok. That's the paid step. This is the prompt-quality layer.

Why it matters

Garbage in, garbage out. A vague idea like "a tool for founders" produces vague queries that pull noise. Spending 60 seconds answering 4 questions narrows the prompt enough that the same paid run surfaces 3-5x more useful posts. That's the whole reason the prod pipeline starts here.

Compare to /expand/

/expand/ is one-shot: idea in, keywords/pain points out. Use it when your idea is already sharp. Refine first if it isn't.