№ 2
Issue April 20, 2026

A weekly list of
problems worth solving.

Each week we read Reddit and pick the complaints that look like real business ideas worth building.

Editor's note

A note before the list.

Four of this week's six ideas are about the same problem: small business owners and freelancers can't get paid on time, or can't get clear advice about money they've already made. One person paid $15,000 for a website and then lost access to it. Another spends a week each month chasing late invoices. A third wants an accountant who tells them what to do next, not just one who files the taxes. The pick I would build first is the Kill Switch for Unpaid Agency Invoices. The idea is simple: if a client is late, the agency's tools should pause the work for them, so nobody on the team has to make the awkward call. If you build any of these, I would love to hear how it went.

Until next Saturday,
The Editor
Theme

Software & SaaS

2 ideas
01
Software & SaaS

Kill Switch for Unpaid Agency Invoices

Every agency that lets a client run a month late on payment is, in effect, giving that client a free loan. The only thing stopping the agency from cutting off service is the awkward phone call. A tool can do the cutting off, so the owner doesn't have to.

The problem

Agency owners want their tools to pause client work the moment an invoice goes past a set number of days. The pause should cover ad accounts, code repos, and reporting dashboards, and it should happen without anyone on the team having to ask first. Right now, that cut-off is a person's job. It feels awkward, so it doesn't happen on time. The Reddit poster wants a switch, in their words: "no exceptions, no PM intervention."

Why it's interesting

Agencies that bring in $1 million a year or more have real cash on the line and would pay for a tool that does the cutting-off for them. Tools like FreshBooks, QuickBooks, and HoneyBook send late-payment reminders, but none of them turn off the actual work. That gap is open.

02
Software & SaaS

Cash Flow Timing Tool for Freelancers

The work is fine. The total income is fine. But three bills can land in the same ten days that two clients are late paying, and the whole business feels broken. The problem is timing. Nothing on the market has solved it for solo freelancers.

The problem

Freelancers who are doing well still spend hours each week trying to make sure they have cash in the bank when bills are due. They chase late invoices, push back due dates, and watch their account balance closely. The Reddit poster gave a 10-day example: a contractor's bill, new equipment, and a software renewal all came due while two big client payments were stuck in transit. Nothing broke, but a full week of paid work was lost to money admin. It happens often. The shape of freelancing causes it.

Why it's interesting

The poster is close to going back to a regular job over a problem that has nothing to do with their work or their income. That is a strong signal. Tools that lend money against unpaid invoices already exist, but they are slow, costly, or built for larger companies. A simple product that shows the next 30 days of cash in and out, plus a short-term loan to cover gaps, would fit millions of freelancers. They would pay for it every month.

Theme

Services & Marketplaces

2 ideas
03
Services & Marketplaces

Advisory Accounting for Small Business Owners

Most small business owners pay an accountant to keep clean books. What they actually want is someone to read the numbers and tell them what to do next. Almost no one is selling that.

The problem

Owners pay for the basics: filed taxes and monthly reports. What they don't get is advice. They can't get a clear answer when they ask if they can afford to hire someone. The reports arrive with no notes on what the numbers mean. When they have a question, the reply takes days. They are paying for a record of the past, when what they need is help with the next decision.

Why it's interesting

An accountant with 10 years of experience is saying this in public and is about to build a product for it. That is a strong sign the gap is real. The owners want more help. They are willing to pay more for it. Part-time CFO services exist, but they cost too much for any business under $5 million in yearly revenue. That is the open space.

04
Services & Marketplaces

Escrow and Ownership Layer for Custom Web Dev

Small businesses pay tens of thousands of dollars for custom websites that they don't really own. They find out only when the site is taken offline and the agency asks for more money to put it back up.

The problem

A founder who runs a medical staffing company paid almost $15,000 to a web agency for a custom website. They accepted the finished site. Months later, the agency took the site offline and asked for more money to put it back up. The agency had used three different billing names, which made it harder for the founder to dispute the charges with their bank. They had no way to fight back, because the agency still controlled the hosting, the domain name, and the source code.

Why it's interesting

This pattern shows up again and again on r/smallbusiness and r/entrepreneur: a small web shop keeps quiet control of the site and uses that control to charge again later. An escrow service that pays the agency in stages would help. It would only release the next payment after the source code is delivered, the domain name is moved to the client, and the new site is up and running. Freelance platforms today don't cover long custom website builds. The market for small businesses that need this is large and not yet served.

Theme

Consumer Products

2 ideas
05
Consumer Products

Granular In-App Content Blocking

Every screen-time app today gives you only two choices: block the whole app, or block nothing. This founder shipped the option that was missing in the middle. Block Reels, but keep Instagram for messages. Block Shorts, but keep YouTube for the videos you came to watch.

The problem

Tools like Opal and Grayscale block whole apps. To mute one addictive feed, a user has to give up direct messages, search, and other parts of the app they actually want. The gap is the ability to block one feature inside an app while leaving the rest of the app working. The founder proved people want this in under a week, with no marketing.

Why it's interesting

Two strangers found the app on the Play Store and paid $4.99 within days, with no marketing from the founder. The digital wellness market is full of apps that block whole apps. Almost nothing exists that blocks one feature inside an app. Apple and Google are slowly adding the tools that make this kind of block possible.

06
Consumer Products

Anti-Spike Bar Cup With Lid

Drink spiking at bars is a real and well-known safety problem. No product made for the public has been picked up by bars themselves at any scale.

The problem

Drink spiking at bars happens often and is widely reported. No mainstream product has solved it. The options today, like test strips and color-changing nail polish, put all the work on the person who might be drugged. They have to remember to bring the test, and to use it in time. A cup with a fitted lid, given out by the bar, removes that step. The bar takes on the protection.

Why it's interesting

Alcohol brands already pay to put their logo on bar glasses and coasters. Putting their name on a safety product is a small step from that. Bars themselves face pressure to look like they care about spiking, both for their reputation and for legal reasons. That makes them likely buyers, even before customers ask for it.

Colophon

How these ideas are picked.

Every Saturday a small program reads a list of subreddits where people post about problems they would pay to fix. Posts that sound like real complaints get sent to a language model. The model rates each one 0 to 5 on three things: how clear the problem is, how strong the demand looks, and how big the market could be.

None of these ideas have been checked. Treat them as places to start your own research, not as final answers. The best signal here is often the comment thread on the original Reddit post, not the scores.