If you're looking for a different OutSystems alternative, Power Apps is another option. It's Microsoft's low-code development foundation for building AI-powered apps, with tools like Copilot, AI suggestions and drag-and-drop interfaces. It's tightly integrated with Microsoft Azure, Visual Studio and GitHub, so it's a good choice if you're already invested in Microsoft's ecosystem. It's also good for modernizing legacy software and deploying apps at large scale. Microsoft Dataverse is built into the product for business logic, security and compliance, and there's a free Developer Plan and a Premium plan at $20 per user/month.
Another good alternative is Mendix, which also uses AI to try to boost developer productivity. It's got a visual IDE, one-click cloud deployment, security and governance tools, and support for data management and integration with third-party services. Mendix is good for a broad range of industries. It's free to use, but you'll have to pay for full features and large-scale use, so it's good for rapid application development and deployment.
If you want an open-source alternative, Noodl is a low-code foundation that uses AI to try to boost developer productivity. It's got tools for rapid prototyping and scaling, with features like real-time data flows, instant updates and integration with third-party services. Noodl is designed to be easy to use, and it's got a variety of hosting options, including a built-in MongoDB database, so it's good for people with varying levels of programming skill.
Last, Appian is a process automation foundation that combines low-code programming with more powerful automation abilities. It's designed to be useful to both technical and nontechnical people, with features like Process Automation, Data Fabric and Process Mining. Appian is used in many industries, and it's designed for fast project delivery, so it's a good option for companies that want to automate complex processes.