Retool vs Microsoft PowerApps: What are the differences?
Retool: Build custom internal tools in minutes. Custom internal tools have the same building blocks. Retool gives you those building blocks, so you can build them much faster; Microsoft PowerApps: Build professional-grade apps the easy way. It is a suite of apps, services, connectors and data platform that provides a rapid application development environment to build custom apps for your business needs. Using Power Apps, you can quickly build custom business apps that connect to your business data stored either in the underlying data platform (Common Data Service) or in various online and on-premises data sources (SharePoint, Excel, Office 365, Dynamics 365, SQL Server, and so on).
Retool and Microsoft PowerApps belong to "Low Code Platforms" category of the tech stack.