This collection maps 20 opportunities across target audience, from focused products that a solo founder can test quickly to broader platforms that need deeper integrations. The ideas span Medium, Low, High build scopes and use business models including SaaS, One-time, Service, Marketplace. Example buyers include Developers, teams; SaaS teams, developers; SaaS teams.
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.