Mermaid vs vnStat

Mermaid

Development

Mermaid is an open-source tool that allows you to create diagrams and visualizations using text and code. It is designed to integrate with documentation sites and wikis to add charts and graphs through a simple markdown-inspired script language. The key benefit is the ability to generate complex diagrams that are portable, themeable, and easy to edit programmatically.

vnStat

Network & Admin

vnStat is an open-source network traffic monitor for Linux that keeps a log of network traffic for the selected interface(s). It uses the network interface statistics provided by the kernel to keep track of the monthly, daily and hourly bandwidth usage.