# Y Combinator (ycombinator.com)

Is ycombinator.com legit and trustworthy? Truth score 75 out of 100, high truth signals: 8 of 11 public checks clear, 3 for information. Legitimacy confidence: high. Customer satisfaction: not enough reviews to say.

- Truth score: 75 out of 100
- Legitimacy confidence: high
- Claimed: no
- Assessed: 2026-10-30

## Business details

- Founded: 2005
- Sells: Services
- Sells to: Businesses
- Domain age: 21 years
- Address: 335 Pioneer Way Mountain View, CA 94041
- Email address: Not found
- Phone number: Not found
- Contact page: https://ycombinator.com/contact
- Website: https://ycombinator.com/
- Social media: Facebook https://www.facebook.com/YCombinator/, Instagram https://www.instagram.com/ycombinator, X https://twitter.com/ycombinator, YouTube https://www.youtube.com/c/ycombinator
- Latest YouTube video: Why Everyone Is About To Have Their Own Database https://www.youtube.com/watch?v=vl7HiMdGfjo

## Summary

ycombinator.com's website address was registered 21 years ago, and is locked against transfer to someone else. Customers have left 1 reviews on SmartCustomer, averaging 4.0 stars out of 5. No malware or phishing warnings found for its website. We could not find an email address or a phone number.

Important context: Truth Signal weighs public evidence about this business. A high score means strong evidence that the business is established and legitimate, not a promise that it is safe to buy from or that every purchase will go well. A low score means the evidence is thin or raises concerns, not that the business is unsafe or a scam.

## Positives

- Its website address was registered 21 years ago (source: rdap)
- A not fully established independent reputation: 1 reviews on SmartCustomer, rated 4.0 stars out of 5 (source: reviews)
- No malware or phishing warnings found for its website (source: safe_browsing)

## Not found

- Email address information was not found from our checks. (source: website)
- Phone number information was not found from our checks. (source: website)

## How to check if ycombinator.com is legit

To check if ycombinator.com is legit yourself, look at the same public records we did: the company register, who owns the web address and since when, customer reviews, visitor numbers, how long the site has existed, social profiles, malware lists, data breaches and email security. Each row below shows what that record says about ycombinator.com; open a row to see the facts and the source to check them yourself. Step by step: [how to know if a shopping site is legit](/guides/how-to-know-if-a-shopping-site-is-legit).

- Who they are: Company details: Based in the US; serves the UK and the US; founded in 2005 (Wikipedia) (For information)
- Who they are: Domain registration: Its website address was registered 21 years ago (Clear)
- Who they are: Website details: We read 4 of its pages: contact, about, terms and privacy (Clear). Pages found: contact (https://ycombinator.com/contact), about (https://ycombinator.com/about), terms (https://ycombinator.com/legal), privacy (https://ycombinator.com/safe-privacy-policy.html)
- Reputation and track record: Customer reviews: Rated 4.0 stars out of 5 from 1 reviews on SmartCustomer (Clear)
- Reputation and track record: App Store: Its app, Y Combinator, is on Apple's App Store, rated 3 out of 5 from 2 ratings, counted in the reviews total. (For information)
- Reputation and track record: Visitor traffic: Real people visited its website in 24 of the last 24 months (For information)
- Reputation and track record: Web history and authority: Found: wikipedia page (Clear)
- Reputation and track record: Social presence: It is on 4 social media platforms (Facebook, Instagram, X and YouTube); the largest audience is 2,430,000 subscribers on YouTube (Clear)
- Safety: Malware and phishing: No malware or phishing warnings found for its website (Clear). This check is not perfect: it can miss a harmful site, and it can wrongly warn about a safe one.
- Safety: Data breach history: No known data breach involving the company (Clear)
- Safety: Domain and email security: Its email is only partly protected: mail forged in its name is reported but not blocked (Clear)

## What its pages say

Quoted word for word from ycombinator.com's own pages.

- In their own words: “People often ask us what happens at Y Combinator. Here is an overview of what happens during the YC program and the benefits you get as a YC founder. We now run YC four times a year, in the winter, spring, summer, and fall.” (https://www.ycombinator.com/about)

## Cite

Truth Signal, Y Combinator: truth score 75 out of 100, legitimacy confidence High, assessed 2026-10-30, https://truthsignal.com/business/ycombinator.com. Licence CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). The same report as JSON: send Accept: application/json to https://truthsignal.com/business/ycombinator.com