Archflow vs Diagrams.so
Archflow
archflow.dev
Diagrams.so
diagrams.soSide by side
| Figure | Archflow | Diagrams.so |
|---|---|---|
| Price from | $5/mo | $10/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | — | Yes |
| Plans published | 2 | 3 |
| Spec score · AI Diagram Generators | 9.0 (#4) | 8.2 (#11) |
| Integrations | The service lists Stripe for payments, OpenAI for AI, GitHub and Google for authentication, and Resend for email. | The product offers a REST API, MCP server, and Python and TypeScript SDKs, and names Claude, Cursor and VS Code as MCP clients. |
| Intended users | The Free plan is positioned for personal projects and exploring Archflow, while Pro is positioned for teams building software together. | The maker describes the product as purpose-built for cloud architects, DevOps engineers and technical teams. |
| Security | The privacy policy says passwords are bcrypt-hashed, data in transit uses TLS/HTTPS, and production access is restricted to authorised personnel. | The maker says data is encrypted in transit with TLS 1.3 and at rest with AES-256, and that it does not train AI models on customer diagrams or prompts. |
| Support | The Free plan includes email support and Pro includes priority support. | The Power plan includes priority support, and the About page lists [email protected] for questions, feedback and partnership inquiries. |
| What it does | Archflow is a SaaS workspace for collaboratively designing software architecture with AI-generated diagrams, user stories, scope cards and technical documentation. | Diagrams.so turns natural-language descriptions into editable architecture diagrams in native Draw.io format. |
Plans
In their own words
Archflow
Archflow is a web platform for collaboratively designing software systems with AI. Its assistant can create architecture diagrams, user stories, scope cards, and technical documentation from natural-language input. The visual editor supports UML classes, interfaces, components, databases, and services, with drag-and-drop creation and undo/redo. Teams can edit together using synchronized changes, live cursors, presence indicators, comments, and activity feeds. Kanban boards track user-story status, estimates, and acceptance criteria, and link stories to architecture diagrams. Documentation is created in a Markdown editor with live preview and categories, and can also be AI-generated. The Free plan costs nothing and allows one project and three diagrams per project. Pro costs $5 a month and includes unlimited projects and diagrams, AI-generated content, real-time collaboration, and priority support. Archflow says prompts and selected project context are sent to OpenAI's API, and AI chat history is stored on its servers.
Diagrams.so
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.