This collection maps 20 opportunities across business models, from focused products that a solo founder can test quickly to broader platforms that need deeper integrations. The ideas span Medium, Low build scopes and use business models including Subscription, Per-event. Example buyers include Local service entrepreneurs; Agencies, freelancers; Retailers, makers.
The three detailed previews below are deliberately different enough to compare. Look for a specific recurring problem, an audience you can reach without a huge advertising budget, and a first version that delivers one measurable result. The market figures are directional estimates. Confirm willingness to pay through customer conversations, competitor research, and a small demand test before building.