Based on our record, Carbide C4 seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Diagrams as code is an excellent idea and I think works really nice for a lot of teams. However, there still space me teams, my team included that simply don't want to learn yet another markup syntax and want something that's more accessible to an entire team, not just developers. This is where IcePanel and Carbide excel. Source: almost 2 years ago
IcePanel - Collaborative system design; linked with reality
Zen Flowchart - The simplest tool to create flowcharts
Structurizr - Structurizr is a workspace editor that creates software architecture diagrams and documentation based on the C4 model.
Speedy Flowchart - For developers to be able to draw flowcharts, convert them into text files and add them into there code or readme quite quickly.
draw.io - Online diagramming application
Wireflow - Create beautiful flowcharts