What makes a strong YC application (and a free tool to check yours)
Y Combinator has accepted founders with nothing more than an idea. In the current batch, 52% of accepted companies applied with just that — no product, no revenue, no traction. The bar isn’t where most people think it is.
The difference between a strong application and a weak one comes down to clarity. Can you explain what you’re building and why in plain language? Can you show that you understand the problem well enough to solve it? Can you convince a partner that you and your co-founder will keep going when things get hard?
We built a free tool that helps you answer those questions before you submit. It’s called the YC Application Advisor, and it was made by YC alumni who’ve been through the process.
How YC partners read applications
YC partners read thousands of applications per batch. They spend a few minutes on each one. Your answers need to communicate quickly and clearly, without jargon, padding, or vague hand-waving about market size.
The questions are deceptively simple: What does your company do? Why did you pick this idea? What do you understand about your users that others don’t?
Weak answers describe the product. Strong answers describe the problem and why you’re the right person to fix it. The strongest are specific enough that a partner can picture exactly what you’re building and why it might work.
Paul Graham’s advice on YC applications has been consistent for years: be concise, be honest, and show that you’ve thought hard about the problem. “Don’t try to sound impressive,” he wrote. “Just explain what you’re doing and why.”
What the advisor gives you
The YC Application Advisor reviews your application against guidance from YC partners and successful alumni. You paste your answers into the form (or import a draft you’ve already written), and it returns:
- An overall score with per-question star ratings
- Specific suggestions for each answer, explaining what’s weak and why
- Rewritten versions that show how the same idea could be communicated more clearly
- A score classification indicating whether an interview looks possible or likely
The feedback draws on real advice that YC partners and alumni have shared publicly over the years. The tool uses high-end reasoning models like Opus 4.6 for analysis, with curated YC guidance as context.
You can paste an existing draft and the tool will extract your answers into the structured form automatically. From there, review the feedback, accept the rewrites you agree with, and edit the rest.
Walkthrough
Go to yc-advisor.andiai.com. You have two paths:
Start from scratch. Click “Start New Application” and fill out the form section by section. The questions match the real YC application: Founders, Company, Progress, Idea, Equity.
Import a draft. If you’ve already started your application on the YC site, copy-paste your answers into the import field. The AI will parse your text and populate the form fields.
Once your answers are in, hit “Get Application Advice.” The review takes about 60-90 seconds. You’ll get back a detailed breakdown with ratings, suggestions, and rewrites for each question.
Save your drafts with custom names so you can come back and iterate. The strongest applications go through multiple rounds of revision, and this tool makes that faster.
Why we built this
Andi is a YC W22 company. We’ve been through the application process, the batch, and everything that comes after.
The hardest part of applying isn’t the application itself. It’s knowing whether your answers are actually landing. Founders who have alumni in their network get feedback before they submit. Founders who don’t are guessing.
We wanted to close that gap. The advisor won’t replace a conversation with a founder who’s been through YC, but it can catch the most common weaknesses before you submit. It’s available to anyone, right now, for free.
What YC is actually worth
Most advice about YC focuses on the money ($500k) or the brand. Those matter, but they’re not why alumni stay so loyal to the program.
YC’s value shows up when your company is in trouble. When growth stalls, when you’re burning cash faster than expected, when the thing that was working stops working. Group Partners stay with you through that. The alumni network shows up with advice, introductions, and sometimes just honest reassurance that the hard part is normal.
Fifty-two percent of accepted companies applied with just an idea. If you’ve been on the fence about applying, you don’t need a finished product to get in.
Try it
The tool is free and doesn’t require an account. Your application data stays in your browser — nothing is stored on our servers.
Try the YC Application Advisor
If you find it useful, we’d appreciate you sharing it with other founders who are applying. And if you have feedback on the tool itself, reach out to @jedwhite or @andi_search on X.