I’ve been working with startups in some capacity for about 15 years. Built my own. Sold it. And for the last decade I’ve been running a marketing agency helping startups scale.

After all these years, you start to see the patterns. The same mistakes. The same traps. The same lessons people don’t learn until it’s too late.

Here are my 6 biggest lessons from 15 years in startup life.

1. Don’t build version 2 if no one has seen version 1

This one is probably the biggest.

Founders build, then rebuild, then rebuild again, not because the customers asked for it, but because they got tired of looking at it. They make changes with zero feedback from actual customers.

They think: “this doesn’t look good enough” or “this feature would be cool”, but none of that matters if no one’s even using version 1.

Stick to the MVP. Do not rebuild based on your own boredom or one person’s opinion. That’s not real data.

Launch version 1. Get feedback. THEN build version 2. Not before.

2. If you’re disrupting an industry, raise capital

If you’re entering a market gap, odds are there isn’t a ton of buyer intent yet.

People might need your product, but they’re not actively searching for it. That means you have to educate them. You have to create demand before you can capture it.

And when you have to create demand, bottom-of-funnel strategies don’t exist. No one’s Googling your solution yet. Which means your initial cost per acquisition is going to be high.

Which means you need capital.

If you’re the first mover, you’re not just building a product, you’re building the market. And that costs money.

3. Prioritize sales and marketing

Do not waste time on vanity, no one cares about your press article, your startup t-shirts, or how nice your UI looks (unless you sell design).

Your job is to get the word out to the right people. Period.

Every startup needs to find its traction channels. Each channel has its own audience, its own language, and its own format that works.

Your job is to figure out where they are and how they want to hear from you. That’s what builds companies.

The product won’t sell itself, not in the beginning.

4. You can’t do it all

Your ambition got you here, but it can also slow you down if you’re not careful.

Just because you can do it all doesn’t mean you should.

At some point, your “busyness” becomes the thing blocking your growth. You’re too busy doing everything, and nothing’s moving forward.

You have to find the balance between wearing the hats and scaling the team. Take the time to step back and see where you’re actually needed, and where you’re just filling space.

5. There’s no cookie-cutter approach

What worked for one startup may not work for you.

That book you read? That founder you follow? Their path might not apply to your situation at all.

The only thing every startup has in common is testing.

Jim Collins has a great analogy: building a business is like a navy battle in the fog. You don’t fire your big cannons first. You fire little bullets into the dark. When you hit something, then you aim the cannons.

That’s what startup growth is. Test, test, test. Ping. Then bombs away.

6. An MVP is not an excuse to build a crappy product

This one needs to be said, because a lot of startups are messing this part up.

Yes, you should launch fast. Yes, you should build an MVP. But too many founders are leaning too hard into the minimum side and forgetting about the viable part.

An MVP is not permission to put out something that’s broken, ugly, or unappealing, and then blame sales and marketing when it doesn’t convert.

If your product doesn’t excite people, it’s not a marketing problem, it’s a product problem.

Make sure your MVP leans more on the side of viable. People still need to want it, use it, and feel like it’s solving something for them.

There’s so much more, but these 6 do a good job of summing up what you need to know upfront.