How to Find a SaaS Idea That Actually Makes Money: 8 Patterns From 100 Founder Interviews

The short version: Almost nobody in these 100 interviews got rich by inventing something new. The founders who made money did the same three things in the same order — they started from demand that was already proven, they made it smaller or moved it to a less crowded market, and they collected money before the product was finished. The founders who struggled almost always skipped that last step and built for months before asking anyone to pay.

Where these numbers come from

This comes from 100 founder interviews published on the Starter Story podcast — bootstrapped SaaS and app builders, most of them solo or two-person teams.

I worked through them case by case and pulled every one into a single sheet: who the founder was, what they built, where the idea came from, what they said they earned, and how long it took. Then I sorted that sheet by one column — *where the idea came from* — and looked for what kept repeating.

Two caveats before you use any number below.

Every figure is what the founder reported at the time of the interview. It is not today's revenue, and some of these companies have changed since. And this is a self-selected group — people who agreed to be interviewed, which skews toward founders with something worth showing.

What makes it useful anyway is the repetition. When 15 or 20 people who never met describe the same sequence in the same order, that sequence is probably real.

What do profitable SaaS ideas have in common?

Eight patterns came up again and again. Five of them belong to the idea stage. The other three — shipping fast with AI tools, short-video distribution, and lifetime deals — are execution and marketing topics, so I have left them out of this piece.

1. The problem was theirs before it was anyone else's. This is the single most repeated pattern: 15+ founders built for a frustration they hit personally. John McAvoy got tired of waiting for buses in the Scottish rain and built Mumigo — 5.2 million downloads, $30,000 MRR. Andy Cloak was pulling financial data into Airtable by hand for IPO briefings; Data Fetcher now runs $23,000 MRR with 600 paying customers. Ken couldn't get ChatGPT to dial in his guitar tone and built Tone Adapt, which made $25,000 in four weeks.

Why it works has nothing to do with passion. It is that you are your own first user, so you skip months of guessing about what customers actually want.

2. Copy something that already makes money, then change one thing. 20+ cases. Tor took Cal AI, an AI calorie tracker that was already booming in the US, localized it into Hebrew, and went from $1,000 in month one to $81,000 a month. David Adius watched a US quit-vaping app earn $200,000 a month and rebuilt the same onboarding for French women quitting sugar — 60,000 downloads in five months, $12,000 a month. Michael saw a height-prediction app listed for $20,000 on Acquire.com, checked TikTok comments for demand, rebuilt it, and reached $100,000 a month.

The rule behind all three: "no competitors" is a warning sign, not an opportunity. If nobody is serving a market, it usually means nobody will pay.

3. Build on top of a platform that is already growing. 12+ cases. Andy Cloak shipped Data Fetcher inside the Airtable extension ecosystem and let Airtable's user base do the distribution. Katie Keith built 19 WordPress and WooCommerce plugins by mining the official ideas forum for high-vote requests — 17,000 paying customers and $1.8 million in annual revenue.

You trade some control for a distribution channel you did not have to build.

4. Ship something that is embarrassingly small. MVP size came up constantly, and the examples are more extreme than you would expect. Alejandro and Mario launched PushScroll with three screens. Sam wrote a buggy version of Algrow in Notepad over a week and still got paying users. Lewis built Audio Pen in a 12-hour hackathon with a no-code tool — 5,000+ paying customers, $15,000 a month.

5. Sell it before you build it. Covered in detail below, because it is the pattern that separates the founders who made money from the ones who did not.

What are the 10 arbitrage angles most people miss?

Beyond the general patterns, ten specific angles showed up — places where the same idea works better because of *where* you point it, not what it is.

Two of these are worth a closer look because they are the least crowded.

Angle 6 — markets nobody else wants. Jordan built Parakeet Chat for people incarcerated in US federal prisons and their families: legal research plus family messaging. He reached 20% of the federal prison population — 30,000 users — and $300,000 a year. Bo built Savvy Nomad for Americans abroad who still owed state tax, and reached $1.7 million a year. These are not glamorous markets, which is exactly why they are open.

Angle 7 — sunset timing. When Microsoft announced Skype was shutting down in March 2025, Dennis built a replacement dialer over one weekend, then took the "Skype alternative" keyword and the Reddit complaints that came with it. $14,000 a month within seven months, 10,000 signups, 20 business customers.

How do you know if an idea is worth building?

Three filters, then one hard deadline.

The three filters (all three must pass before you touch a code editor):

The deadline is the part most people skip. Brian's rule, from the interviews: before writing any code, commit to a number and a date. His was "10 events with an actual date": ten confirmed bookings on the calendar. If you miss it, you do not keep building — you find out why the signal was not there.

A portfolio founder who runs a dozen small products put it more bluntly. After launch, you give it a few weeks or a few months. If it is growing, double down. If it is flat, drop it and move to the next one — no guilt attached.

How long until you get your first dollar?

This is the number nobody publishes, so here it is, split into two groups. Pre-sale means money arrived before the product worked.

Pre-sale

After launch

The honest summary: if you sell before you build, the gap is zero. If you build first, plan on spending one to ten weeks after launch before anyone pays — and that is the fast end of the range, from founders who were interviewed because it worked.

What if you have no industry knowledge?

This is the objection I hear most, and the interviews do address it. Two founders with no background in the field they entered:

Gil knew nothing about YouTube creators. His first move was not research — it was opening a fresh X account with zero followers and following every serious person in that space, just to watch what they talked about. Then he built small free tools, ran giveaways, and collected a list of 1,000+ people. Only after that did he DM them one by one and ask what was broken. He had a distribution list before he had a product.

Will Cannon went the other direction: he gave up on inventing anything. He looked for business models already validated by someone else, then read the one- and two-star reviews of the leading products and used the most common complaint as his angle. He also taught himself cold email, cold calling, and SEO, because he knew he could not out-engineer competitors.

And a warning from the other side. Garb built about 72 apps in 60 days without talking to customers. None of them earned a dollar. Then the host gave him a different challenge: two customer conversations a day and no new projects for 30 days. That produced about $100 in the first month and $6,500 by the end of the second. His own summary of what he got wrong:

"The first one was to live the problem you're solving. If it's something that you know is outside of you, it's really hard to understand the sentiments of your customer and understand what is it that's going to make them buy. Like what are the pain points."

You can work around missing domain knowledge with distribution (Gil) or with borrowed demand (Will Cannon). What you cannot do is work around not understanding the customer — which is also why the podcast host's line cuts as deep as it does:

"The information that you will get from one single 15-minute conversation is more valuable than the 70 apps that you could build."

What should you do first?

If you are starting from nothing, the order matters more than the idea.

1. Pick your source. Either a problem you personally hit, or a product already making money that you can move somewhere less crowded.
2. Run the three filters. Competitor earning money, searchable demand, users searching for alternatives.
3. Set your deadline in writing. A number of paying customers and a date.
4. Sell before you build. A landing page and a pre-order, or 15-minute calls if it is B2B.
5. Only then build — and build it small. Three screens is a real answer.

FAQ

Do I need a technical co-founder?

No. Several founders in this set had no coding background and shipped with AI tools. Hassam built his first version in 48 hours and reached $21,800 MRR within 90 days.

Is it better to find an untapped market?

No, and this is the most expensive mistake in the set. A market with no competitors is usually a market with no buyers. Look for proven demand and take a slice.

How much money do I need to start?

Most founders here started under $500. The recurring costs were a domain, hosting, and AI tool subscriptions. The scarce resource was time and customer conversations, not capital.

What if I have no industry experience?

Two viable routes: build a distribution list first and ask that list what is broken (Gil), or take an already-validated model and improve the weakest thing about it (Will Cannon). Both are slower than using your own pain points.

How long should I give an idea before quitting?

Set it before you start. The interviews offer two versions: "10 events with an actual date" as a pre-build commitment, or a few weeks to a few months of flat growth after launch before you drop it.

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One more thing. I turned the three filters and the deadline rule into a single-page checklist — built from this analysis. It is free, and it costs you an email.

Get the checklist →

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Related reading

• How to Validate a SaaS Idea From Your Own Pain Point
• How to Find SaaS Ideas From Competitors
• How to Pre-Sell a SaaS Product

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*Every case and figure above comes from founder interviews published on the Starter Story podcast, as reported at the time of recording.*