First up is ChatUML, an AI-assisted diagram creation tool that uses OpenAI's GPT-4 algorithm to generate diagrams that are clear, accurate and nicely formatted. It works on multiple platforms and can export in several formats, including SVG, PNG, PDF and ASCII. That makes it a good option for generating diagrams quickly and accurately, especially for complex processes like user registration flows.
Another option is EdrawMax, an online diagramming tool that offers more than 280 types of diagrams, including flowcharts. With a wide range of tools and AI-assisted features, EdrawMax lets you collaborate through its cloud-based workspace and import/export common file formats. It also comes with a large library of templates and symbols, making it a good option for many industries and use cases.
If you want something more collaborative, Mockitt offers an integrated design and prototyping tool that includes intuitive flowchart creation tools and real-time collaboration abilities. With AI features and a design system for shared assets, Mockitt is designed to help you work more efficiently and communicate better with your team members, making it a good option for speeding up your design process for complex diagrams.