At a glance

Eraser Eraser
Best for Engineering teams wanting docs-as-diagrams Engineering teams creating architecture diagrams and technical documentation
Starting price Free Free
Free tier ✓ ✓
Open source — —
Free tier available ✓ ✓
Open source — —
AI Diagram ✓ —
AI generation — ✓
Architecture Diagrams ✓ —
Architecture diagrams — ✓
Cloud Diagrams ✓ —
Diagram-as-code — ✓
Docs ✓ —
Technical docs — ✓

Eraser

Strengths

  • Includes Architecture Diagrams as a core feature, purpose-built for diagramming workflows
  • Includes Cloud Diagrams as a core feature, purpose-built for diagramming workflows
  • Free for 5 documents — generous enough for most small teams to get real work done
  • Includes docs alongside the core feature set — fewer separate tools needed

Weaknesses

  • Free plan exists but key features are locked behind the paid upgrade
  • Fewer built-in features means you may need additional tools to cover gaps
  • Ecosystem of third-party integrations is smaller than the market leaders in diagramming
  • Limited team/admin features if your organization eventually scales up

Eraser

Strengths

  • Purpose-built for technical and architecture diagrams
  • Diagram-as-code generates visuals from text descriptions
  • Combines diagrams with technical documentation
  • AI-powered diagram generation from natural language

Weaknesses

  • Narrow focus — not for general brainstorming or design
  • Smaller community than Excalidraw or Miro
  • Some features still in development
  • Limited template library compared to Lucidchart

The bottom line

Pricing: Both Eraser and Eraser are free. You can try both without spending a dollar.

Feature gaps: Eraser offers AI Diagram, Architecture Diagrams and Cloud Diagrams that Eraser lacks. Eraser brings AI generation, Architecture diagrams and Diagram-as-code that Eraser does not have.

Where each tool shines: Eraser's biggest strengths are: includes architecture diagrams as a core feature, purpose-built for diagramming workflows. includes cloud diagrams as a core feature, purpose-built for diagramming workflows. Eraser's biggest strengths are: purpose-built for technical and architecture diagrams. diagram-as-code generates visuals from text descriptions.

Watch out for: With Eraser, users commonly note that free plan exists but key features are locked behind the paid upgrade. With Eraser, the main complaint is that narrow focus — not for general brainstorming or design.

Choose Eraser if...

  • You need a tool built for engineering teams wanting docs-as-diagrams
  • You specifically need AI Diagram and Architecture Diagrams
  • You care about includes cloud diagrams as a core feature, purpose-built for diagramming workflows
  • The free tier works for you: free for 5 documents

Choose Eraser if...

  • You need a tool built for engineering teams creating architecture diagrams and technical documentation
  • You specifically need AI generation and Architecture diagrams
  • You care about diagram-as-code generates visuals from text descriptions

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