Eraser

For engineers, technical PMs, and design-adjacent teammates who need architecture and flow diagrams—not Miro workshop boards and not Figma UI files. Eraser combines an infinite canvas, diagram-as-code, Markdown notes, and AI diagram generation, with hooks into GitHub, Notion, Confluence, and VS Code. Prefer Lucid for broad business diagramming suites, or Excalidraw/tldraw for lightweight free sketching without Eraser’s technical-doc focus.

Design Productivity & Workflow

Freemium

Use it when

You need AI-assisted technical diagrams and architecture docs that stay editable as code—and you can upgrade when three files and a handful of AI credits aren’t enough.

What it does well

Prompt-to-diagram plus diagram-as-code editing, Markdown notes, and export to PDF/PNG/SVG/MD
Free forever: 3 files, 3 AI diagram credits, 7-day history, unlimited guests, GitHub/Notion/Confluence/VS Code
Starter: unlimited files, ~40 AI diagrams, 90-day history, private files, custom icons, API calls
Business: ~250 AI diagrams, unlimited history, SAML SSO, reference diagrams, more custom icons
Unlimited free guests on every plan; Enterprise for unlimited AI and flexible deployments

Skip it when

You’ll outgrow 3 files / 3 AI credits quickly—budget Starter for ongoing architecture work
Private files or SSO are required—those start at Starter and Business respectively
You need workshop templates and facilitation kits—use Miro or FigJam
You’re mainly sketching casually—Excalidraw or tldraw may be lighter
UI design systems and product mockups belong in Figma, not a diagramming workspace

Fits your workflow

Paste a prompt, infra snippet, or design notes → generate in Eraser → refine with diagram-as-code or AI edits → embed in Notion/Confluence or export for reviews. Invite guests freely; upgrade when file and AI caps block the team.