Go to indiehackers.com and find out what profitable businesses people have created. Make a competitor. The profit margins in SaaS are phenomenal so there is alw

Go to indiehackers.com and find out what profitable businesses people have created. Make a competitor. The profit margins in SaaS are phenomenal so there is always room for new entrants. You can throw some keywords into the Google Keyword Planner tool, and see what people are searching for. Or just run a normal google search for "tools for <industry>" and see what pops up. Don't be discouraged by competitors. Their existence basically pre-validates the market for you. Just make sure you can differentiate yourself somehow (usually, on price because your product will be less feature rich initially). And I'll throw this in without any kind of justification: don't make a SaaS for other developers, or lawyers.