Question: I need a solution that allows me to build complex applications quickly without requiring extensive technical expertise.

If you need a way to build sophisticated apps quickly even if you don't have a lot of technical expertise, Power Apps is a good option. It's a low-code development foundation from Microsoft that lets you build AI-powered apps quickly. With tools like AI suggestions, drag-and-drop interfaces and built-in deployment pipelines, you can start with a blank slate and deploy apps with confidence. Power Apps integrates with Microsoft Azure, Visual Studio and GitHub and connects to more than 1,200 data sources.

Another option is Mendix, a low-code foundation for rapid development and deployment of mobile and web apps. Mendix uses AI to speed up the development process and has a visual interface called Studio Pro. It has single-click cloud deployment, security and governance tools, and is good for a broad range of industries. Mendix is free to use, but you'll have to pay for full features and large-scale use.

OutSystems is another option. The company's low-code approach combines visual, model-driven development with AI and DevOps tools to speed up development. It's good for building core systems, automating processes and extending legacy systems. OutSystems has several pricing tiers, including a free Personal Edition, so it can be used for small projects or small-scale, high-complexity projects.

If you want no-code options, Bubble is a serious contender. It lets you build, design, test and deploy production apps without writing a line of code. Bubble has a drag-and-drop editor, customizable templates and AI-generated pages. It also has scalable and secure hosting, so it's good for enterprise-scale web apps and startup projects.