ArchitectureDiagram.ai vs Diagrams.so

ArchitectureDiagram.ai turns natural-language descriptions into architecture diagrams that users can refine through chat-based editing. It supports Mermaid flowcharts, draw.io diagrams, Excalidraw sketches, and AI-generated images, with 24 templates for patterns such as microservices, serverless, Kubernetes, and RAG pipelines. Party Mode generates image candidates from multiple models in parallel for comparison. Diagrams can be downloaded as PNG, copied to the clipboard, shared through public read-only links, or embedded in supported wikis. Present view creates.pptx and.pdf decks with speaker notes on Hacker and higher plans. Expert Chat for architecture feedback is included on Hacker and higher; Free and Builder users get three review messages total across diagrams. The web product has a free plan with two diagrams per month and paid plans starting at $4.99 per month. The API uses bearer keys to generate Mermaid text synchronously or rendered PNG images asynchronously; listed generation costs are $0.05 and $0.20 respectively. Generation history is saved for up to 50 items. The privacy policy says prompts and generated outputs are retained to improve generation.

Diagrams.so turns written descriptions into editable architecture diagrams, saved in Draw.io format. It generates flowcharts, sequence diagrams, entity relationship diagrams and cloud infrastructure diagrams, with official AWS, Azure, Google Cloud Platform and Kubernetes icon libraries alongside network, database, security and general-purpose shapes. Opinionated Mode can suggest missing components; non-blocking warnings flag risks such as single-AZ deployments and publicly exposed resources. Diagrams export as.drawio XML, PNG or SVG, and.drawio files open in Draw.io, Confluence, VS Code and Notion. Users can import.drawio files on every plan and compare or restore versions using history. The product offers a REST API, MCP server, and Python and TypeScript SDKs, with Claude, Cursor and VS Code listed as MCP clients. Free includes five credits, requires a BYO LLM key and watermarks exports. Free-tier diagrams are public; private diagrams require Pro or Power. Pro costs $10 a year billed annually or $15/mo billed monthly; Power costs $16.67 a year billed annually or $25/mo billed monthly.