ProcessOn

ProcessOn is a mature online diagramming tool that has deeply integrated AI generation, capable of producing clear, editable, and multi-player collaborative professional diagrams such as flowcharts, sequence diagrams, class diagrams, architecture diagrams, and mind maps. It is worth adopting for teams that frequently create technical diagrams and seek significant efficiency gains; however, for occasional, simple graph drawing, its advanced value may not be fully realized.

The barrier is low: no installation required, sign-up and use immediately, basic features free. Advanced features and AI generation require a subscription. According to the official Double Eleven promotion, a personal annual VIP is offered at 99 CNY (original 159 CNY), including a one-year AI membership (normally 129 CNY/year standalone); an X user also reported a two-year VIP for 168 CNY with AI features. Note that these are limited-time promotional prices, and regular pricing could be higher. Students and light users can start with free quotas.