Diagrams.so

Free plan APIWeb

What Diagrams.so is

Diagrams.so turns natural-language descriptions into editable architecture diagrams, including flowcharts, sequence diagrams, ERDs, and cloud infrastructure diagrams. It uses official AWS, Azure, Google Cloud Platform, and Kubernetes icon libraries alongside network, database, security, and general-purpose shapes. Opinionated Mode can suggest missing components, and architecture warnings flag risks such as single-AZ deployments or publicly exposed resources. Diagrams export as .drawio XML, PNG, or SVG; .drawio files open in Draw.io, Confluence, VS Code, and Notion. Users can import .drawio files on every plan and compare or restore versions with history. Integrations include a REST API, MCP server, and Python and TypeScript SDKs; named MCP clients include Claude, Cursor, and VS Code. The Free plan has five credits, requires a BYO LLM key, and watermarks exports. Free-tier diagrams are public and appear in the community gallery; private diagrams are available on Pro and Power. Pro is $10 per month billed annually or $15 per month billed monthly; Power is $16.67 per month billed annually or $25 per month billed monthly.

Who it suits

It is aimed at cloud architects, DevOps engineers, and technical teams who want editable diagrams from written descriptions. Its API, MCP server, and SDKs also suit teams connecting diagram creation to tools or workflows.

What it does well

Generates four types of diagrams from natural-language descriptions.
Includes official AWS, Azure, Google Cloud, and Kubernetes icons.
Exports to .drawio XML, PNG, and SVG.
Imports .drawio files on every plan.
Version history supports comparing or restoring diagrams.

What to know first

Free plan is limited to five credits.
Free plan requires a BYO LLM key.
Free-tier diagrams are public and exports are watermarked.
Custom icon sets are not supported in the generator.

Limits

The Free plan provides five credits, requires a BYO LLM key, and watermarks exports; its diagrams are public in the community gallery. Pro provides 75 credits per month, while Power provides 250 credits per month. Prompts are limited to 30,000 characters, and very large diagrams may take longer to generate or open.

Plans

Plan	Billed and limits	Price
Free	5 credits · BYO LLM key · watermarked exports · free .drawio imports	Free
Pro	when billed annually; or $15/mo billed monthly · 75 credits / month · private diagrams · clean exports without watermark · one-click Fix all issues	$10 a month
Power	when billed annually; or $25/mo billed monthly · 250 credits / month · image, PDF and DOCX to diagram · priority generation queue · priority support	$16.67 a month

As diagrams.so lists them, read 7 Oct 2026. The maker's own page has the final word.

Getting started

Open diagrams.so in a web browser.
Choose the Free plan or a paid plan.
For the Free plan, bring your own LLM key.
Describe the diagram you want generated.
Import an existing .drawio file if needed.

Verdict

Diagrams.so combines text-based diagram generation with editable Draw.io files, integrations, and architecture warnings. Review the Free plan’s public visibility and credit limits, or consider Pro or Power for private diagrams.

Questions

Is Diagrams.so free?

Yes. The Free plan costs nothing and includes five credits, a BYO LLM key requirement, watermarked exports and free .drawio imports.

How much do the paid plans cost?

Pro is $10 a year when billed annually, or $15 per month billed monthly. Power is $16.67 a year when billed annually, or $25 per month billed monthly.

Can I keep diagrams private?

Private diagrams are available on Pro and Power. Free-tier diagrams are public and appear in the community gallery.

What platforms and file formats does it support?

The listed platform is web. Diagrams export in .drawio, PNG, SVG, PDF and JPG formats; .drawio files open in Draw.io, Confluence, VS Code and Notion.

Does it integrate with developer tools?

It offers a REST API, MCP server, and Python and TypeScript SDKs. Claude, Cursor and VS Code are named MCP clients.

Is Diagrams.so SOC 2 certified?

The maker says it follows SOC 2-aligned security practices, but is not currently certified against SOC 2, HIPAA or PCI-DSS.

Facts from Diagrams.so's own pages

Architecture assistance: Opinionated Mode suggests missing components, while non-blocking architecture warnings flag risks such as single-AZ deployments and publicly exposed resources. · diagrams.so, 7 Oct 2026
Cloud icon libraries: It supports official AWS, Azure, Google Cloud Platform and Kubernetes icon libraries, plus network, database, security and general-purpose shapes. · diagrams.so, 7 Oct 2026
Compliance: Diagrams.so says it follows SOC 2-aligned security practices but is not currently certified against SOC 2, HIPAA or PCI-DSS. · diagrams.so, 7 Oct 2026
Data residency: The maker says all data is stored in AWS US regions and EU data residency options are on its roadmap. · diagrams.so, 7 Oct 2026
Diagram types: It generates flowcharts, sequence diagrams, ERDs and cloud infrastructure diagrams. · diagrams.so, 7 Oct 2026
Formats and compatibility: Diagrams export as .drawio XML, PNG or SVG, and the .drawio files open in Draw.io, Confluence, VS Code and Notion. · diagrams.so, 7 Oct 2026
Headquarters: Richmond, Virginia, USA · diagrams.so, 28 Sept 2026
Import and history: Users can import .drawio files for free on every plan and use version history to compare or restore diagram versions. · diagrams.so, 7 Oct 2026
Integrations: The product offers a REST API, MCP server, and Python and TypeScript SDKs, and names Claude, Cursor and VS Code as MCP clients. · diagrams.so, 7 Oct 2026
Intended users: The maker describes the product as purpose-built for cloud architects, DevOps engineers and technical teams. · diagrams.so, 7 Oct 2026
Privacy limits: Free-tier diagrams are public and appear in the community gallery; private diagrams are available on Pro and Power. · diagrams.so, 7 Oct 2026
Security: 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. · diagrams.so, 7 Oct 2026
Support: The Power plan includes priority support, and the About page lists [email protected] for questions, feedback and partnership inquiries. · diagrams.so, 7 Oct 2026
Usage limits: The FAQ says prompts are limited to 30,000 characters, custom icon sets are not supported in the generator, and very large diagrams may take longer to generate or open. · diagrams.so, 7 Oct 2026
What it does: Diagrams.so turns natural-language descriptions into editable architecture diagrams in native Draw.io format. · diagrams.so, 7 Oct 2026

Where Diagrams.so stands on Freedom251

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