Sell the software you built, even if it has no users

You built something that works. Maybe on nights and weekends, maybe after a layoff. It runs, it does something useful, and it is sitting there earning nothing. That is the thing you can sell.

Can you sell software you built on the side?

Yes. If it runs and does something useful, you can list it and sell a license to it. You do not need users, revenue, or a company first. The work is done. Selling it is what is left.

This is true whether you still have a job or not. The software you built on your own time is yours to sell, and plenty of Builders here are employed people turning a weekend project into a second income.

How does one thing you built turn into income?

The license is non-exclusive. You sell a license to one Buyer, you keep the copyright, and you sell the same software to the next Buyer, and the one after that. One piece of software, sold more than once. The commission comes out of your side, and it is lowest on the sales you bring yourself.

The software keeps selling, because each Buyer gets their own license to run their own copy. You can even keep running your own version the whole time.

What kind of software sells?

Working software you made. An AI agent, an internal tool, a scheduling app, a scraper, a starter template, a bot that does one thing well. If a Buyer can run it and get value on day one, it has a price.

AI-built software counts. 84% of developers now use or plan to use AI tools to write code, per the Stack Overflow 2025 Developer Survey, which means a lot of good software got built by people who never shipped it anywhere. A Buyer does not care whether you typed every line or an AI did. They care that it works.

What do you have to do to sell it?

List it. That is most of the job. You do not have to market it, answer support tickets, chase invoices, or turn yourself into a company. You point at software you already deployed, set a price, and it goes up for sale.

You keep everything you built. The Builder keeps the copyright, so selling a license does not mean giving the thing away. You can keep running your own copy, keep improving it, and keep selling licenses to it the whole time.

How much do you keep, and how does the money reach you?

What you keep depends on who brought the Buyer. A sale from the marketplace carries a 25% commission. A sale you brought yourself, from a link you shared, carries 8% plus $0.50. The fee comes out of your side either way, so the more of your own sales you drive, the more you keep.

Every sale is final and the source is delivered the moment the Buyer pays. They have 24 hours to report misrepresentation or a bug that stops it working, and your payout is held for 72 hours so a report filed in time is reviewed before any money moves. After that, the sale is settled. Builders verify their identity before they are paid out.

Where do you start?

You list the software from wherever it already lives at list from anywhere. If the reason it never earned anything is that nobody found it, read you built an app and nobody uses it. For the math on what selling a codebase to many Buyers pays over time, read is SaaS passive income. And if you are still working out whether any of this is for you, who is Zero to Hundred for covers who uses the marketplace.