People talk about bootstrapped software like it is a different animal from a "real" startup. It is not. Same five phases, same order, same place where most of them die. The only real difference is whose money is burning.
Here is the honest version, without the LinkedIn glow.
1. The idea
Easy. Everyone has one.
Really, everyone. Your neighbour has one, your accountant has one, the guy at the gym has three. An idea costs nothing and proves nothing, which is exactly why it feels so good. You get all the excitement of a business with none of the work.
Congratulations, you are roughly 1% of the way there.
2. Build it and they will come
This is where it actually starts, and this is where the fiction starts too.
Most people build because they had the idea. Not because they checked with anyone. Not because ten potential customers said "yes, I would pay for that". Talking to people is uncomfortable and slow, building is fun and gives you a dopamine hit every evening. So you build.
I am not going to pretend I have never done this. It is the reality for almost everyone who ships something on their own.
But here is the part nobody says out loud: nothing forces you to stop. A funded startup has a board, a burn rate and a deadline that drags them out of the building whether they like it or not. You have none of that. So phase 2 can quietly last two years, and it will feel productive the whole time, because you are shipping.
That is the risk. Not that you built the wrong thing. That you stayed in the building phase far too long because it was the comfortable one.
3. Product-market fit
This is the big one. The hardest, longest, most expensive phase, and the one where most projects actually die.
Finding someone who genuinely wants the thing you built is not one task, it is a pile of them:
where do you spend, Google, LinkedIn, events, cold outreach?
do you do demos, and how many before someone signs?
partnerships, resellers, integrations?
who onboards them, and how long does it take?
and the big one: how do you move them off the system they already use?
That last one is the killer and it is underrated. Nobody switches because your product is better. They switch when leaving the old thing is easier than staying with it. Better is not a reason, easier is.
And here is the money part, which is the bit I think most people get wrong.
Phase 3 is where you burn cash to find out which approach works, and most of them will not work. You are not buying results, you are buying information. You pay for the campaign that flops so you know not to run it again. That is uncomfortable, because it does not feel like progress.
Before AI, almost all of the budget went into development. Marketing came as an afterthought, if it came at all. Which was sort of understandable back then, building really was the expensive part. It is not anymore. But the habit stayed. People still budget like the hard part is the code.
It is backwards, and it is the reason phase 3 kills so many.
You can also pivot much faster now, which sounds like pure upside. It is not. Every pivot resets your momentum, your positioning and your learning cycle with real customers. Building with AI is cheap now, but trust is not, and sales cycles did not get shorter because you got faster at shipping. Every week you spend in phase 3 is a week you did not spend somewhere else. It is all opportunity cost.
4. Growth
Let us be precise here, because "you are profitable now" is usually a lie at this point.
What actually happens is smaller and better than that: you have enough users to know the thing works. Not enough to relax. Enough to stop wondering whether the whole idea was nonsense.
And immediately, everyone wants everything. Every customer has a list. Every call ends with "could it also do...". With AI you can genuinely build most of it, and fast. So the question stops being can we and becomes should we.
My answer, most of the time: no.
Because every feature you ship is yours forever. Support, bugs, migrations, documentation, the security patch in three years, the customer who is the only one using it and will churn if you remove it. The cost of building a feature collapsed. The cost of owning one did not move at all.
Meanwhile you have to keep the customers you already have, which is unglamorous work and gets no applause. And you want to raise prices, because you would like to pay yourself, or because someone put money in and expects a return. Some people will be annoyed by that. Honestly, most bootstrapped SaaS are priced too low rather than too high, so raise them anyway, just be decent about it and grandfather the early ones.
Somewhere in here you stop answering every email in twenty minutes. You add a process. You say no more often. Congratulations, you are corporate now. It happens to everyone and it is not a moral failure, it is just what scale does.
5. Decline
Someone will come for your business. Whether you like it or not, whether they are better or not.
It is usually not a cliff, it is a slow melt. Growth flattens, churn creeps up, a competitor shows up with a cleaner onboarding and half your feature set, and half is enough for the customers you were never really serving well.
At that point you are back in phase 3, working out who you are for now. Sometimes you are back in phase 2, building something properly new. That is fine. That is the job.
What actually protects you is not being loved. Love is nice and it does not survive a procurement review. What protects you is being hard to leave: their data lives in you, their workflow runs through you, their other tools are wired into you. People talk about network effects here, but almost nobody at this size has them. Switching cost is the moat you can actually build, and you build it on purpose, not by accident.
So what
Same five phases as the funded guys. Same order, same trap in the middle.
The difference is what is on fire. They burn investor money and can afford to sit in phase 3 for two years while they figure it out. You burn your own, and when it is gone the phases stop, because rent and food do not care about your roadmap.
Which is why phase 3 deserves the budget, the calendar and the attention, and why "we will do marketing later" is the most expensive sentence in this whole thing.
Flitz.ai 
Switzerland.