Freedom251 › AI Diagram Generators
LetDraw
What LetDraw is
LetDraw is a hand-drawn whiteboard for creating diagrams that explain software. It turns Mermaid and D2 code into editable shapes, and can export diagrams back to either format. It can also create diagrams from infrastructure and development inputs such as Docker Compose, Kubernetes, Terraform, Helm, Graphviz DOT, SQL DDL, OpenAPI, git logs, and EXPLAIN output. The canvas offers editable tables and code blocks, mind maps, charts, math and LaTeX, and smart connectors, with PNG, SVG, and PDF export. AI can generate diagrams from text, images, or voice, and explain an existing diagram. LetDraw runs in a browser and offline, saves drawings locally by default, and makes cloud sync optional. Live collaboration and shared snapshots use browser-side AES-GCM end-to-end encryption. A free plan includes 3 documents, 1 workspace, 5 comments per document, and 3 AI prompts. Pro costs $5 per month or $50 per year. API and MCP access are for Pro and Enterprise users; Enterprise includes a self-hosting option.
Who it suits
LetDraw suits developers, DevOps and platform teams, architects, technical writers, and others who need to explain software or infrastructure. Its education and project-management audience also includes students, educators, product managers, and project managers.
What it does well
- Converts Mermaid and D2 code into editable shapes.
- Generates diagrams from infrastructure and development inputs.
- Offers PNG, SVG, PDF, Mermaid, and D2 exports.
- Works offline and stores drawings locally by default.
- Live collaboration and shared snapshots use end-to-end encryption.
What to know first
- Free plan is limited to 3 documents and 1 workspace.
- Free users cannot create API or MCP tokens.
- Enterprise self-hosting is not included on other plans.
- Not formally SOC 2 or ISO 27001 certified.
Limits
The free plan includes 3 documents, 1 workspace, 5 comments per document, and 3 AI prompts. API and MCP access are unavailable to free and guest users; Pro adds unlimited documents and folders, up to 10 workspaces, unlimited comments, real-time collaboration, version history, and more AI.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | Free forever; no card needed · 3 documents · 1 workspace · 5 comments per document · 3 free AI prompts | Free |
| Pro | $5 / month, or $50 / year (save 2 months) · Unlimited documents and folders · Up to 10 workspaces · Unlimited comments · Real-time collaboration · Version history · More AI included | $5 a month |
| Enterprise | Custom terms for organisations · SSO · SCIM · Automatic domain join · Unlimited workspaces · Self-hosting option · Priority support | On request |
As letdraw.com lists them, read 3 Oct 2026. The maker's own page has the final word.
Getting started
- Open https://letdraw.com/ in a browser.
- Start with the free plan, which is billed Free forever and needs no card.
- Create a diagram from supported code or infrastructure inputs, or use the canvas tools.
- Use the free plan's 3 documents, 1 workspace, 5 comments per document, and 3 AI prompts.
- Choose Pro for API and MCP access, or Enterprise for those options and self-hosting.
Verdict
LetDraw combines diagram conversion, varied technical inputs, and a broad canvas toolset. Check its free-plan limits and paid-tier requirements for API, MCP, or self-hosting access before choosing it.
Questions
Is LetDraw free?
Yes. Its Free plan is billed Free forever, requires no card, and includes 3 documents, 1 workspace, 5 comments per document, and 3 AI prompts.
How much does Pro cost?
Pro is $5 per month or $50 per year. The annual option saves 2 months.
Which platforms does LetDraw support?
The listed platforms are web, API, and self-hosted. The app also works in a browser and offline.
Can I import and export Mermaid diagrams?
Yes. LetDraw converts Mermaid code into editable shapes and can export diagrams to Mermaid. It also supports D2 in both directions.
Does LetDraw have an API or MCP server?
Yes. Pro and Enterprise users can access its REST API and MCP server. Free and guest users cannot create tokens.
Can LetDraw be self-hosted?
Enterprise includes a self-hosting option so data can stay on the customer's own infrastructure.
Facts from LetDraw's own pages
- AI
- Users can generate diagrams from text, images, or voice, and ask AI to explain an existing diagram. · docs.letdraw.com, 3 Oct 2026
- API access
- The API and MCP are available to Pro and Enterprise users; free and guest users cannot create tokens. · docs.letdraw.com, 3 Oct 2026
- Audience
- The getting-started guide names software developers, DevOps and platform teams, software architects, product and project managers, technical writers, students, and educators as typical users. · docs.letdraw.com, 3 Oct 2026
- Code diagrams
- It converts Mermaid and D2 code into editable shapes and can export diagrams back to Mermaid or D2. · letdraw.com, 3 Oct 2026
- Compliance
- LetDraw says it aligns with GDPR principles but is not formally SOC 2 or ISO 27001 certified. · letdraw.com, 3 Oct 2026
- Diagram tools
- The canvas includes editable tables and code blocks, mind maps, charts, math/LaTeX, smart connectors, and PNG, SVG, and PDF export. · letdraw.com, 3 Oct 2026
- Encryption
- Live collaboration and shared snapshots use browser-side AES-GCM end-to-end encryption, and requests use TLS with HSTS. · letdraw.com, 3 Oct 2026
- Infrastructure inputs
- It can generate diagrams from Docker Compose, Kubernetes, Terraform, Helm, Graphviz DOT, SQL DDL, OpenAPI, git log, EXPLAIN, Mermaid, and D2 inputs. · letdraw.com, 3 Oct 2026
- Integrations
- LetDraw provides a REST API and MCP server, with documentation for connecting clients including Claude and Cursor. · docs.letdraw.com, 3 Oct 2026
- Privacy
- The app works in the browser and offline, stores drawings locally by default, and makes cloud sync opt-in. · letdraw.com, 3 Oct 2026
- Product
- LetDraw is a hand-drawn whiteboard for diagrams that explain how software works. · letdraw.com, 3 Oct 2026
- Self-hosting
- Enterprise includes a self-hosting option so data can stay on the customer’s own infrastructure. · letdraw.com, 3 Oct 2026
- Support
- The support page says most requests receive a reply within one business day, with faster replies for Pro and Enterprise. · letdraw.com, 3 Oct 2026
Where LetDraw stands on Freedom251
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