There is a saying in the world of entrepreneurs that goes something like this: “The day I quit is the day before I succeed.” While it is impossible to prove this theory wrong, there is no doubt some of the biggest and best companies in the world have had their moments of almost becoming failed startups—and yet they have lived to tell the tale. Next time you are wondering if it’s time to let go of your business and move on, take note of these startup stories, which really do prove anything is possible, and it is never time to quit.

Successful Companies That Were Almost Failed Startups

1. Reddit

Entertainment, social networking, and news website Reddit have 430 million unique users. By anyone’s standards, that is a lot of traffic, even for a website that launched over 15 years ago. While these numbers may cause you to wonder if your website could ever reach such heights, the story of Reddit’s humble beginnings truly proves anything is possible.

You see, when Reddit first launched in June 2005, it was just like any other fledgling website: it had no visitors. But rather than rest on their laurels and wait for people to find the site, Reddit’s two co-founders – Steve Huffman and Alexis Ohanian – had other ideas. To get the ball rolling, Huffman and Ohanian set up a plethora of fake user accounts. Using these accounts, they created and inserted themselves into conversations on the bulletin board-style site. According to Huffman, these fake accounts served two purposes. Not only did these fake accounts help populate the site with users, albeit fake users, but they also helped set the tone of the site and steer conversations in the direction Huffman and Ohanian had in mind when they founded the site.

The upshot: It’s all about herd behavior. When a website has users, the subtle implication to an outsider is that there must be something to see or do. Think about how you feel when you walk down a street and see a crowd of people gathered around something. You want to see what the fuss is about, right? The lesson here is to make it appear as if your business has a crowd.

2. The Muse

Launched in early 2012, The Muse is a one-stop career destination for millennials offering everything from career advice through to a thriving job board. Although The Muse received plenty of buzz in its early months – and a site such as The Muse was sorely needed at the time – co-founder Kathryn Minshew knew she needed to find a way to continue the momentum.

Now, it’s no big secret that one of the quickest and most effective ways to spread the word about your fledgling business is to tell everyone you know. So, Minshew decided to do just that. She sifted through her Gmail account to unearth the email addresses of everyone she had ever emailed. By the time she was done, Minshew had an Excel spreadsheet containing around 1,000 email addresses. Then, she began “spreading the word,” emailing each and every address on that list.

Minshew soon found herself in a bit of a pickle. Perhaps unsurprisingly, Gmail had blacklisted her as a spammer and shut down her account. Now, she was not only unable to continue emailing her contact list. She couldn’t email anyone, at all.

The upshot: There is nothing wrong with using guerrilla marketing tactics to spread the word about your business, but remember the old adage: “If it looks like a duck, swims like a duck, and quacks like a duck, then it probably is a duck.” Minshew obviously didn’t intend to spam anyone, but Gmail couldn’t be expected to know that. If you’re planning to employ similar guerrilla marketing tactics to promote your business, try to think ahead so you can avoid similar disasters.

3. Airbnb

Today, Airbnb is valued at more than $25 billion, and that number is seemingly growing every day — but it wasn’t always this way. The super-disruptive startup’s early days were rough. It sounds unlikely, especially given investors are practically throwing money at Airbnb these days, but when the company first launched in 2008, investors were having none of it. For proof, check out the article Airbnb co-founder Brian Chesky recently wrote for Medium. In the article, Chesky discusses the seven prominent Silicon Valley investors who turned Airbnb down. He even shares screenshots of the rejection emails they received. (Who’s laughing now?)

So how did Airbnb go from receiving rejection letters to being one of the most highly valued startups in the world? They did what any forward-thinking entrepreneurial team would do and created cereal boxes. Wait, what? Yes, you read that correctly. The team made special-edition Cheerios cereal boxes – using cardboard and hot glue, no less – named after the two presidential candidates running in the 2008 elections: “Obama O’s” for Barack Obama and “Cap’n McCains” for John McCain. This quirky yet totally ingenious idea helped Airbnb raise the tens of thousands of dollars the team needed to keep Airbnb in business.

The upshot: The struggle – and the hustle – is real. The Airbnb team is living proof that if you want your business to survive and thrive, even when everyone is saying no, you are going to have to hustle like you have never hustled before, even if it means thinking (way) outside the box.

4. Instacart

Instacart founder Apoorva Mehta wanted to get into Y Combinator, the revered Silicon Valley-based seed fund, badly. Unfortunately, Mehta soon discovered he had missed the application deadline by a whopping two months. That was three years ago now. Instacart has now raised more than $275 million in investor money, with Y Combinator the first to jump on board. So how did Mehta gain a place in Y Combinator’s highly sought-after program? He was determined.

Firstly, Mehta appealed to his network of connections and asked them for introductions to any Y Combinator partners they knew. Soon, he had several introductions at his disposal, so he moved on to the next step: emailing partners. Unsurprisingly, given he was two months past deadline, he received several rejections. However, Mehta’s keen eye spotted a small window of opportunity in one rejection email. Mehta pounced. He knew that the key to gaining a place in the program relied on the partners getting to know his product, so he used the Instacart app to send Garry Tan, a Y Combinator partner, a six-pack of beer. Lo and behold, it worked. Mehta received a meeting and was able to impress the group enough to be accepted into the program shortly after the meeting.

The upshot: Ideally, your product/business should be able to speak for itself. If it does, half your work is done. The other half is simply getting your product/business in front of the right people and allowing it to win hearts and minds.

5. GoDaddy

GoDaddy founder Bob Parsons had already encountered plenty of twists and turns in life, including a stint in the Vietnam War, when he decided to turn to entrepreneurship. In fact, it was during his time in Vietnam that Parsons developed a way of thinking that would serve him well – in combat and entrepreneurship. Put simply, Parsons learned to adjust the way he looked at things.

In Vietnam, Parsons learned that the key to survival was to take things day by day. Parsons once told Inc.:

“I didn’t worry about getting hurt. I didn’t worry about dying. I just focused on mail call the next morning.”

By adjusting his thought process, Parsons was able to make it through.

Fast-forward to 2001, four years after Parsons launched GoDaddy. While GoDaddy hadn’t yet gone bust, it was on its way, and Parsons was considering shutting down the company before he lost his entire fortune. But then a moment in time caused Parsons to adjust his focus, again. He was in Hawaii when he noticed the valet parking cars looked as “happy as a lark.” Then and there, Parsons realized that the worst thing that could happen to him if he went broke was he’d become a valet. Suddenly, by adjusting his focus, the “worst” didn’t seem so bad and maintaining a positive attitude was feasible. According to reports, GoDaddy became profitable just a few months later.

The upshot: What’s the worst that can happen if you become one of the failed startups? You learn a lesson, and you move on. In many cases, your second or third business might be the successful one. The worst-case scenario is always going to be something you can survive.

6. Marie Forleo

When Marie Forleo first decided to be a life coach, she knew she was up against a large obstacle: her age. While she believed she had the goods, she also knew it would be hard to convince clients to listen to someone so young. Forleo quickly realized she had to fake it until she made it.

In Issue 24 of Foundr, Forleo revealed the key to faking it:

“I used the Internet to effectively mask how young I was. I never lied but I went out and I had headshots done and they were black and white, and I put on my makeup in a certain way and I had a particular haircut that I probably looked 10 to 15 years older than I actually was.”

Clearly, the move paid off. Marie Forleo (the brand) was one of Inc.‘s 500 fastest-growing companies of 2014, thanks no doubt to its more than 275,000 followers worldwide. More recently, Marie Forleo (the woman) became one of the several mentors who will head to Richard Branson’s Necker Island in September to tutor up-and-coming entrepreneurs.

The upshot: Look ahead to figure out the obstacles you might encounter, and then come up with a plan to tackle them. Don’t be afraid to face your fears head-on.

7. Uber

Uber has managed to fit a lifetime’s worth of drama into its six years.

Although co-founders Travis Kalanick and Garrett Camp conceived of the idea in early 2009, the first UberCab (as it was then known) app arrived on the scene during the summer of 2010. Within a few short months of its arrival, UberCab received its first cease-and-desist letter, which caused the company to change its name to Uber.

A year later, a funding deal between Uber and Netscape co-founder Marc Andreessen, of Andreessen Horowitz, fell through. Details on the situation are still iffy.

In the years since, Uber has encountered other issues: a wrongful death lawsuit; a class-action; allegations Uber operates operating illegally; protests; allegations of sabotage; accusations of sexism and misogyny; privacy complaints, and safety issues.

The list goes on, yet still Uber grows.

The upshot: The issues Uber has faced are enough to make even the most hardened of entrepreneurs quiver, so how has Uber not just survived but thrived? Put simply, Uber offers a service that consumers love. Moreover, they love Uber more than they care about the issues surrounding Uber. That is enough to make investors throw money at Uber, which in turn gives Uber more than enough money to shake off the issues, one by one.

8. Happy Family Organics

Your first product won’t always be your best seller. Jessica Rolph’s organic baby food business Happy Family Organics failed twice before finding product market fit and scaling from $0 to $63M in sales.

Rolph launched Happy Family puffs, a dry cereal that breaks down easily and is used as a first solid food for babies. The puffs were a big break for the company—some would say a lucky break.

They happened to launch their product at the same time their main competitor, Earth’s Best, was having supply chain issues. To fill the empty shelf space, retailers stocked Happy Family puffs.

“For some reason, for like three or four months, we were the only cereal on the shelf, and they just stocked us,” Rolph says. “I remember a picture of just all of our little cans lined up. We couldn’t believe it. And so that was really the break that we got to be able to scale to the next level.”

But it was more than just luck that boosted their company. Rolph had finally hit on product-market fit. Not only was their product in the right place in the supermarket, but it was exactly what customers were looking for in a baby cereal.

“We stripped out all of the fake flavors, the fake colors, the things that the other competitors had and made a natural version [of] those puffs,” she says. “We truly had product market fit. So customers wanted them. They loved our natural approach, and that’s what started getting us momentum.”

The upshot: Your first product might not be your unicorn product, so don’t be heartened. Rolph knew she was in the right space; she just needed to find the right product that customers were craving.

Read more: Business Not Making Money? Here’s the Reason(s) Why

Don’t Be One of the Failed Startups

The seven startup stories featured above are just a small sampling of the many, many companies that have had a near-miss with disaster before becoming a modern success story. (Let’s not forget: The time serial entrepreneur Evan Williams fired the entire Blogger staff and then went on to sell Blogger to Google; the time Google’s founders Larry Page and Sergey Brin tried to sell the search engine for $1 million, tried again to sell Google for $750,000, yet were rejected; and the time Amazon was on the verge of joining a long list of failed startups.)

The proof is in the pudding: never give up. Tomorrow is the day you succeed. Explore Foundr+ to get all access to the proven frameworks to start and build your business.