ClickUp

ClickUp is a comprehensive work management platform that offers many features aligning with the concept of a low-code/no-code internal tools platform, particularly in its ability to customize workflows, integrate with various tools, and automate processes. While it's not explicitly marketed as a 'low-code/no-code internal tools platform' in the same vein as Retool, its functionalities for building custom workflows, integrating with APIs, and providing a visual interface for task and project management strongly overlap. The platform emphasizes customization without code, extensive integrations, and automation, which are core aspects of the described concept. It also offers enterprise-grade security and flexible deployment options, further strengthening the match.