Startup Idea Validator: Score Your Idea in the Proofline Lab

This is the Lab, the free tool on Proofline for pressure-testing a startup idea. It's a startup idea validator in a narrow sense: it doesn't chat with you or write a business plan. It scores an idea on the same five criteria and the same evidence adjustment that Proofline uses for its daily published idea, so you can compare your own idea against ones we've already scored.

What the startup idea validator does

You describe an idea. The Lab rates it against five criteria, each with a fixed weight, then adjusts the total by how much evidence backs the ratings. The weights are:

• Pain, 30%. How bad the problem is for the people who have it.
• Why now, 25%. Whether something changed recently that makes the idea possible or urgent.
• Revenue, 20%. Whether people already pay to solve this, or plausibly would.
• Open market, 15%. How much room is left, given who is already selling.
• Ease, 10%. How hard it is for a small team to build and ship a first version.

The weighted total is then multiplied by an evidence factor between 0.70 and 1.00. An idea with thin support takes up to a 30% cut. An idea backed by real comparables and observed demand keeps its full score. The weighting puts pain first and ease last, so a hard-to-build product that fixes a serious problem can outscore an easy one nobody needs. The methodology page has the detail.

How to use it

1. Write the idea as one specific sentence. Name the buyer and the job. "Software for small businesses" can't be scored. "Quote builder for pressure washing crews" can.
2. Be honest about the pain. If you have heard the complaint from real people, say so. If you're guessing, the evidence factor should reflect that.
3. Read the breakdown, not just the total. A 6 made of strong pain and weak revenue is a different problem from a 6 made of the opposite.
4. Check the comparables. Proofline's daily ideas are published with real comparables. Look at who those companies are before you trust an "open market" number.

Example output: the arithmetic, worked through

The table below is a worked illustration, not a real scored idea. The ratings are invented for the sake of showing the math, on a 0 to 10 scale. Check the methodology page for the scale the Lab reports in.

Now the evidence factor. Same ratings, three different levels of proof:

Same idea, same ratings, and the score drops by more than two points. That is the point of the multiplier. It stops a confident pitch from outranking a well-supported one.

Real scored ideas to read first

For real output, open any of the daily ideas we've already published. Each page shows the scoring and the comparables behind it. A few to start with:

• Quote builder for pressure washing
• Shift swaps for home care
• Allergen labels for ghost kitchens
• DOT drug test scheduling for small fleets
• Rent-ready inspections for small landlords

Today's idea is on the today page, and the full ranking is on the leaderboard. If you'd rather browse by sector, there are lists for real estate, restaurants and trucking.

Limits you should know about

• A score is a ranking aid, not a forecast. It tells you which of two ideas looks stronger on the evidence available. It can't tell you whether you will succeed.
• It can't replace talking to buyers. The evidence factor rewards proof, but the Lab can only work with what you give it. A handful of real conversations with prospects will do more for your idea than any rewording of the pitch.
• The weights are a judgment call. We put pain first and ease last. If you believe distribution matters more than we do, you'll disagree with some rankings. The weights are published so you can see exactly where.
• Vague ideas are hard to score. A broad category gives you, and the Lab, little to compare against.

Where other idea validators are better

Proofline's Lab gives you a number and a breakdown. Other tools do different jobs, and for some of them they do it better.

ValidatorAI is built around conversation. It is listed as a free AI tool where you enter a startup idea and get feedback on market opportunity, legal issues and potential customers. Its own site describes Val, an AI mentor that does market analysis, risk assessment and go/no-go recommendations. If you want open-ended back-and-forth and written advice, that's a better fit than a scoring formula. We compare the two in more detail on the ValidatorAI comparison.

Nxcode's validator takes a more structured, report-style route. It advertises a free 7-step process with SWOT analysis, competitor research and a market size calculator, and says no signup is required. If you need a SWOT or a market-size worksheet to hand to someone, it is built for that and the Lab is not.

Where the Lab fits: you want a fixed, published formula, a visible evidence discount, and a way to line your idea up against other scored ideas. Other ways to size up the field are on the compare page, and the broader reading list is under resources.

What to do after you get a score

A low score on evidence is the most fixable result. Go find the proof: interview five people who have the problem, find three companies charging for a partial fix, and note what changed in the last two years. Then run the idea again. If the score holds up and you want to move on it, the build page is the next stop. Site disclosures are on the disclosure page.