Eraser vs Mermaid

Eraser is a diagramming tool for technical teams that generates diagrams from prompts, code, files, and private Git repositories. It supports flow charts, entity-relationship diagrams, cloud architecture diagrams, sequence diagrams, and BPMN diagrams. Generated diagrams can be adjusted with diagram-as-code or AI edits, and reference libraries can align output with company building blocks. Collaboration includes real-time work, comments, tagging, and unlimited free guests. The service lists GitHub, Notion, Confluence, and a VS Code extension, as well as live diagram embeds and Git-powered updates. The free plan includes 3 files, 3 AI diagrams, and 7-day version history. Starter costs $15 a month when billed annually, or $20 monthly; it adds unlimited files, private files, and API calls. The diagram API is for paid users, while MCP operations are subject to plan AI-credit limits. Eraser says it is SOC 2 Type 2 certified, performs annual penetration testing, and does not train AI models on customer content. Enterprise deployment options include multi-tenant, single-tenant, and self-hosted setups.

Mermaid is an open-source JavaScript tool that turns Markdown-inspired text definitions into diagrams and visualizations. Its diagram types include flowcharts, sequence and class diagrams, state diagrams, Gantt charts, timelines, mindmaps, Git graphs, use case diagrams, and event modeling diagrams. Users can also describe an idea, upload a document, or paste a transcript to generate a diagram, then refine it in a context-aware conversation. The platform supports real-time co-editing, click-based adjustments, and shareable live links that recipients can open without logging in. Mermaid can be used in its Live Editor, installed as an npm dependency, loaded from a CDN, or deployed through its API. Listed integrations span IDEs, office tools, and community projects. It imports.mmd files and exports PNG, SVG, and Markdown; version history is available. The free Basic tier allows up to six diagrams, a size limit of 60, 15 AI credits, and one team and project creation. Plus costs $10 a month billed annually; Premium costs $20 a month billed annually.