If you're looking for a Goptimise replacement, BuildShip is another option. It's a low-code visual backend builder that uses AI to rapidly create workflows, APIs, scheduled jobs and cloud functions. With a built-in Firestore database or BYOD option, unlimited cloud storage and integration with many services, BuildShip is designed to scale and offer strong security. It also has features like autocomplete, a debugger and a sandboxing environment, so it's good for developers and teams that want to build a scalable backend with a minimum of code.
Another contender is Noodl, an open-source, AI-assisted low-code foundation for building full-stack custom applications. Noodl offers visual development, real-time data flow visualization and built-in backend and user management. Its AI assistance generates building blocks, database queries and UI elements, so you don't have to write as much code. It's good for rapid creation of scalable web apps, and it's community supported with lots of documentation and support channels, so it's good for beginners and pros.
If you want a more complete set of tools, check out Backendless. It's a full-featured suite of tools for building and running high-performance apps with the least amount of work. It's got a visual UI builder, codeless logic for the frontend, direct API integration and real-time database abilities. Backendless supports responsive web and mobile apps with streamlined user management and customizable notifications. It's got flexible deployment options, so it's good for everything from simple web apps to complex enterprise projects.