Question: I'm looking for a low-code app builder that can help me create high-performance apps quickly and efficiently.

For a low-code app builder that can help you build high-performance apps fast, Backendless is a good option. It includes a range of tools, like a visual UI builder, codeless logic for the frontend, and direct API integration for data management. The service supports responsive web and mobile apps, real-time databases, customizable user management, and flexible deployment options for different business needs.

Another contender is Power Apps from Microsoft. You can build AI-powered apps with it, with drag-and-drop tools, AI suggestions and integration with Microsoft Azure, Visual Studio and GitHub. It includes a built-in data platform, Microsoft Dataverse, and can be deployed from scratch or from images and Figma files. That makes it good for modernizing legacy software and managing large-scale app operations.

Mendix is another good option, with AI-assisted development, a visual IDE, single-click cloud deployment and good security and governance tools. It's got good data management and integration with third-party services, so it's good for a lot of industries. Mendix's modern, cross-platform UI/UX and AI-powered features mean fast development and deployment.

If you want a no-code option, Bubble offers a full-stack app builder that lets you design, test and deploy production-ready apps without writing code. It's got hundreds of customizable templates, a drag-and-drop editor and AI-generated pages. Bubble is scalable and secure, with good collaboration tools and a range of pricing options for different needs.