Watch the DoorDash team's YC application video

The Y Combinator startup directory includes every company YC has funded

The startup accelerator has funded more than 5,000 companies over the years. This YC-specific search engine lets you look up any company to find out if it's a YC alum.

Read Paul Graham’s initial post announcing YC’s first batch

In March 2005, Y Combinator cofounder Paul Graham announced the program that would become Y Combinator on his website.

Visualize where the first batch of founders from the famous startup accelerator Y Combinator are now.

Y Combinator changed the way startups around the world are built

Many of the philosophies that the leaders of Y Combinator have infused into the program’s portfolio companies have become the playbook for building the next big thing, such as its focus on founder personality and more.

‘Demo days’ are when founders at Y Combinator pitch their startup ideas

Investors sit in the audience, waiting to hear what this season’s batch of YC founders have cooked up. YC argues that going through the process of a demo day can help founders get a better understanding of their startup themselves.

CEO Gary Tan explains Y Combinators guiding philosophy

Hear YC President and CEO Garry Tan talk about why he values earnesty and excellent communication skills in YC founders, his thoughts on AI, and more in this unexpectedly deep and in-depth interview.

YouTube began as a quirky site invented by former PayPal employees

In February 2005, YouTube was launched by Steve Chen, Chad Hurley, and Jawed Karim. Their idea was to build a platform to support the convenient sharing of videos online, a relatively novel idea in the days of cable TV and early social media.

Many startup founders pull out-of-the-box stunts to get their businesses off the ground

Do you know Airbnb’s founders used cereal (yes, as in the breakfast food) to secure their initial round of funding? Or that PayPal’s founders once gave out free money to get people to sign up for the platform? These stories might be crazy, but they’re not uncommon.

Explore the schedule of a three-month YC batch

During the three months that founders accepted into Y Combinator spend on YC’s California campus, they receive mentorship from YC partners, networking opportunities, and, overall, a ton of time to build and scale their companies.

Sam Altman gave his first-ever startup pitch after dropping out of Stanford

He dropped out of Stanford to start Loopt, which sold in 2012 for $43.4M. You can watch his first-ever startup pitch in a video.

Y Combinator has a roughly 1% acceptance rate

That’s lower than the most elite universities and colleges in the world—but insiders have some tips about how applicants can have the best shot of being accepted to the selective startup accelerator.

Delivery apps have realigned the restaurant industry

As delivery apps like Grubhub and DoorDash became popularity, traditional dine-in restaurants have adapted to become more accommodating. In this thinkpiece for the Atlantic, Ellen Cushing argues that it's both changed the kind of food being made and realigned our very notion of a restaurant. (Some readers may experience a paywall.)

Startups are small, early-stage companies designed to grow fast

The definition of the word “startup” is complicated—so who better to define it than Y Combinator, perhaps the most well-known startup accelerator in the business? YC’s blog also explains how startups make money and build products.

Read an article about Uber's origin story, which starts back in 2009 when its cofounders tried to catch a cab during a Paris snowstorm without much luck.

Ride along on one coffee company’s journey through the stock market

From going public with an initial public offering, to struggling with how negative news coverage impacts a stock’s value, this video lets you put yourself in the shoes of a newly public company. This makes learning about the inner workings of the stock market much easier.

Mark Zuckerberg credits some of Facebook's success to constant evolution

Before becoming the head of OpenAI, Sam Altman was the president of Y Combinator—a startup accelerator company that supported companies like Airbnb, DoorDash, and Coinbase. In 2016, Altman interviewed Zuckerberg about creating Facebook and its growth over time. Zuckerberg said that, unlike other companies (think: CourseMatch), Facebook kept growing and adding new features, which prevented the app from becoming obsolete.

A timeline and visuals on TikTok's rapid growth

The app that would become TikTok is known as Douyin in China, and this article recounts its history, acquisition of rival Musical.ly, and rebranding ahead of its lightning growth. One visualization shows how quickly TikTok reached 1B users.

See design app Canva's original pitch deck for investors

The full story of WeWork, one of the most dramatic startup journeys of all time

WeWork has been through a lot since the office space company was founded as a startup in 2010. From its failed IPO in 2019, to the various leadership antics of its founder, Adam Neumann (some have claimed that he acted like a cult leader at times), to how it navigated remote work trends during the pandemic, this video tells the full story of WeWork's growth, failures, and more.

YouTube was acquired by Google for $1.65B in stock during its second year

In 2006, Google acquired YouTube for $1.65B, only two years after its launch. Sequoia Capital, one of Silicon Valley's best-known venture firms, was an early investor in the streaming video platform, seeing it as the next step in the evolution of user-generated content that flourished online during the mid-2000s.

Robinhood's pivot from everyday investors to hyperactive traders

The platform was conceived as a hub for first-time investors looking to get into trading. After criticism in 2021, the company pivoted to focus on more regular, daily traders, among whom the company's CEO has now become a cult hero.

The dot-com boom made Mark Cuban a billionaire

Cuban co-founded AudioNet with Todd Wagner in 1995 before it became Broadcast.com—a web app that allowed people to listen to sports commentary on their computers if they couldn't watch a game. In 1999, Yahoo bought Broadcast.com for $5.7B. By the time the market crashed, Cuban had already sold most of his stock in the company and had become a billionaire.

WellHub is a startup serving roughly 4 million people in 11 countries, providing broad wellness benefits to employees

Valued at $2.4B in 2025, the company helps workers get gym access and meditation apps, in addition to basic healthcare. Listen to the founder of the company, Cesar Cevalho, explain how he scaled the company with Jeff Berman.

Find out what it's like to work in the gig economy

If you’re thinking about being a gig worker—for example, an Airbnb host, Lyft driver, or DoorDash delivery person—keep this article in mind before you start. This article outlines particular concepts prospective gig workers should think about before signing up for gig work, such as upfront costs and budgeting for taxes.

Why TikTok loves fast-casual restaurant Chili's

The company noticed TikTokers posting enthusiastically about its food and began partnering with creators on the platform. The videos include mukbangs, a South Korean trend in which users eat a massive amount of food, and #cheesepulls, where Chili's mozzarella sticks are stretched to their limits.

Startups follow a 'minimum viable product' strategy to determine demand

Michael Seibel, group partner for startup incubator Y Combinator, explains how to build a minimum viable product (also known as an MVP) for any startup idea. Using real companies that experienced the Y Combinator program as examples, he walks through how to determine an MVP feature set, how to present an MVP to potential investors, and more.

The dating app Hinge markets itself as 'designed to be deleted'

Harvard graduate Justin McLeod started Hinge in 2011. Since then, despite competition from larger apps like Bumble and Tinder, it's grown into the third-largest dating app by market share in the US, bringing in roughly $396M in revenue as of 2023.

Amazon expanded its business and diversified its offerings by acquiring companies

Amazon’s retail and cloud businesses have been key drivers of the company’s growth over the years, but they haven’t done all the work by themselves. Companies Amazon has acquired include the video doorbell maker Ring, the grocer Whole Foods, the streaming service Twitch, the shoe retailer Zappos, and the film studio MGM.

Cyan Banister, once homeless, was an angel investor in Uber, SpaceX, and DeepMind.

Meet the investor running his life with AI

Daniel Ha is a venture capitalist who built a suite of AI agents to boost his productivity, both professionally and personally. At his VC firm, a troupe of agents gathers data on startups and analyzes it from competing perspectives to produce a confidence score. When his dad was diagnosed with cancer, Ha used an oncology-trained AI to help him understand the condition.

A 2002 profile of unprofitable Netflix as it bet on a subscription model

The streaming behemoth saw the potential in subscriptions early, and in this 2002 profile CEO Reed Hastings was already talking about plans to offer "downloadable" movies. The profile serves as a historical artifact confirming the startup's risky bets and showcases the contingent factors that led to its success. (Some users may experience a paywall.)

Chipotle was initially started to fund another restaurant

Founder Steve Ells was a chef at Stars, a tony restaurant in San Francisco. His original plan for Chipotle—which first opened in 1993 in Denver, Colorado—was to make enough money to open a separate, higher-end restaurant.

Temu was born out of a Chinese company that, at the time, was called Pinduoduo

Today, the company is called PDD Holdings, and owns both Temu and its very similar sister app in China, Pinduoduo.

See Don Valentine's original 1977 memo for Sequoia's investment into Apple Computer

In honor of Apple's 50-year anniversary, Sequoia Capital recently posted a tweet on X (the social media platform formerly known as Twitter) with a photo of the original 1977 memo for Sequoia's investment in Apple.

Watch a rare early interview with Palantir CEO Alex Karp

Prior to Palantir's public listing in 2020, CEO Alex Karp did not give many interviews. In a rare interview from 2009, Karp discussed the dominance of American technology, his academic background, and the founding idea of Silicon Valley entrepreneurs as key players in aiding the fight against terrorism.

Shake Shack began as a hot dog cart in Madison Square Park

The high-growth restaurant chain is one of the industry's biggest success stories. With chef Danny Meyer at the helm, the restaurant arose out of chance amid an effort to rehabilitate New York's Madison Park. Learn more of the restaurant's story here.

Reimagining YouTube as cable TV, complete with channel-surfing

The site streams YouTube content as if it were broadcast television, providing the ability to flip through channels and enter videos mid-stream, and you also can't easily skip ahead. The product is designed in part to bring back serendipity to video discovery.

What it's like to stage in an award-winning kitchen

This video goes behind the scenes with chef Geoff Kie's stage (essentially a short internship) with nominee Crystal Wahpepah at her restaurant in Oakland. Kie learns practical skills from Wahpepah, but also discusses how the stage helped him understand the restaurant's role in the community—and how he might bring those lessons back to his own kitchen.

Special-purpose acquisition companies let companies skirt the IPO process

A video explains how private companies have taken advantage of this loophole, why investing in these companies isn’t always a good idea, and how blank-check companies (as they’re commonly called) work.

An interview with WeBank’s CFO

Leveraging Tencent's massive WeChat network, WeBank started as China's first digital bank and now serves 340 million users and 2.8 million businesses (as of 2024). Chief Financial Officer Arthur Wang discusses how the company is using AI and continuous innovation to stay ahead of the technological curve.

Whitney Wolfe Herd is considered the youngest self-made female billionaire

Whitney Wolfe Herd founded dating app Bumble in her 20s after cofounding Tinder. She was inspired to create Bumble partly due to an experience she had with female friends who made fun of her for making the first move with a man she went on a date with.

Inside the life of a 13-year-old beauty influencer

Thirteen-year-old Evelyn started posting get-ready-with-me style videos the summer before she entered 7th grade. Pull back the curtain on how she rose to internet fame through cutting observations of her peers at school, and how platforms like TikTok have responded to those under 13 joining the creator economy.

Watch the Super Bowl commercial that launched Discover

A Sears subsidiary, the financial services company Dean Witter, launched Discover Card through a Super Bowl commercial during Super Bowl XX.

‘Nipple-gate’ helped spark the creation of YouTube

After Justin Timberlake exposed Janet Jackson during Super Bowl XXXVIII, frustrated viewers searching for clips inspired Jawed Karim and his partners to build YouTube as a platform for sharing missed moments.

View a list of companies owned by Google's parent company, Alphabet

These companies include Google subsidiaries like YouTube, the biggest online video sharing and streaming platform, Nest, which manufactures smart products like speakers and thermostats, and Waymo, the technology company developing self-driving cars.

Watch a recreation of the 'Speedee Service System,' the assembly line production method pioneered by the McDonald's brothers that revolutionized fast food in the US.

The Dow Jones & Company began as a small news service in 1882

Founded in 1882 by Charles Dow, Edward Jones and Charles Bergstresser, Dow Jones & Company started with hand-delivered market bulletins. Today it’s a global financial news giant, best known for publishing The Wall Street Journal.

The economics of Chick-fil-A

Chick-fil-A has dominated national customer satisfaction surveys while growing conservatively for decades. This video goes into the economics the company deploys to be successful.

A letter to Ethereum’s community from an early builder

Fuel Network CEO Nick Dodson writes about his experience as an early app builder on the Ethereum blockchain. He talks about why he perceives Ethereum as being different from rival blockchains like Solana, espousing the ethos and “spirit” of the Ethereum network and community. At the same time, he lays out some hopes he has for the future of Ethereum in a telling peek into an Ethereum insider’s brain. Read the letter here.

See the 25 largest initial public offerings in US history.

These 25 companies—which include UPS, Uber Technologies, AT&T, and The Kraft Heinz Co.—had some of the biggest IPO drops in US history. However, not all these drops led to long-term (or even immediate) success.