monday.com

monday.com is a work operating system that offers a low-code/no-code platform for various business needs, including project management, CRM, and development. It provides features like integrations with various tools (APIs and databases), automations (workflows), and a customizable interface, aligning with the core concept of building internal tools. While it doesn't explicitly state 'drag-and-drop UI builder' in the same way Retool does, its emphasis on 'no-code interface' and visual customization implies a similar functionality. The platform also highlights enterprise-grade security, flexible deployment options (cloud/on-premise), and AI integration, which directly match several 'must-have' and 'other' features.