I like Mermaid Charts best for their simplicity and flexibility in creating diagrams using plain text. You can write a few lines of code to generate flowcharts, sequence diagrams, Gantt charts, or mind maps, which makes them easy to version-control and integrate into documentation. They’re lightweight, easy to update, and ideal for technical teams who want to embed diagrams directly in Markdown, wikis, or code repositories without using heavy graphic tools.

I have been using Mermaid Chart for years, primarily for sequence diagrams and flowcharts, and recently for C4 Context diagrams. I was introduced to it by a colleague and instantly appreciated how it allowed me to keep documentation updated by modifying a central Mermaid diagram. Setting up Mermaid Chart was a breeze because it is a SaaS tool. It allows me to create diagrams using clear text easily. The tool is fantastic in helping me collaborate with end users to translate their ideas into visual diagrams and then quickly iterate on them. This significantly reduces rework as shared understanding of processes is achieved much sooner. The ability to save diagrams as PNGs is particularly useful, and it integrates well with other software like Confluence, DevOps, and Word. What makes it the best diagramming tool for me is its ability to remove the need to manually position objects on a canvas, which is especially beneficial since I have ADHD and can overly focus on such tasks.

You can just write and draw a chart. makes implementation of flowsharts faster... earlier I used to use draw.io which was cumbersome, took time and had to match each arrow with each block.... editing and manking changes in comples flowcharts was time consuming.