Eraser Review (2026): Pricing, Features & Honest Verdict

TLDR

Eraser is an AI-powered technical design tool that creates diagrams from code, generates architecture docs, and replaces clunky diagramming tools with a clean, markdown-first interface. Best for: engineers and architects creating technical documentation. Price: Free (3 files), $15/mo Starter, $45/mo Business. Rating: 7.6/10

What is Eraser?

Eraser is a technical design and documentation platform that combines diagram-as-code with AI generation. Instead of dragging boxes around in Lucidchart or fighting with Mermaid syntax, you describe what you want and Eraser generates clean architecture diagrams, entity relationship diagrams, flowcharts, and sequence diagrams. The AI does the layout work. You focus on the architecture.

The product won Product of the Week on Product Hunt and has been adopted by engineering teams at Microsoft, Amazon, and Visa. It positions itself as the modern replacement for a combination of tools: Lucidchart for diagrams, Confluence for docs, and Notion for notes.

We found the diagram-as-code approach genuinely better than traditional drag-and-drop diagramming. Writing a few lines of code to generate a cloud architecture diagram is faster and more maintainable than manually positioning boxes. The diagrams look professional without any design effort, which is exactly what engineers want.

Key Features

Diagram-as-Code

Write diagrams in a simple code syntax and Eraser renders them as polished visuals. The code-based approach means diagrams are version-controllable, easily maintainable, and can be updated without re-doing layout work. Supported types include cloud architecture diagrams (AWS, GCP, Azure icons included), entity relationship diagrams, flowcharts, and sequence diagrams. The syntax is simpler than Mermaid or PlantUML.

DiagramGPT

Describe your system in plain English and the AI generates a complete diagram. You can say “microservices architecture with API gateway, three services, PostgreSQL, and Redis” and get a properly laid out architecture diagram in seconds. The AI handles icon selection, layout, and styling. You refine from there rather than starting from scratch.

Eraserbot for Codebases

Connect your GitHub repository and Eraserbot automatically generates and updates diagrams based on your actual code. As your codebase evolves, the diagrams stay current. This solves the classic problem of architecture docs going stale two weeks after someone drew them on a whiteboard.

Markdown-First Documentation

All content is stored as markdown, making it portable and searchable. You can export diagrams as PNG, SVG, or PDF, and export documents as markdown. The editor supports rich markdown with embedded diagrams, creating a single workspace for both technical writing and visual documentation.

Pricing and Plans

The Free plan includes 3 files, 5 AI diagram generations, 7-day version history, and unlimited guest access. It is enough to try the product but not for regular use.

The Starter plan at $15/month per user ($20/month on monthly billing) provides unlimited files, 40 AI diagrams per month, 90-day version history, private files, and 20 custom icons. This covers most individual engineers and small teams.

The Business plan at $45/month per user ($60/month monthly) adds 250 AI diagrams, unlimited version history, SAML SSO, 100 custom icons, and reference diagrams. Built for larger engineering teams that need collaboration and access control.

Enterprise pricing is custom with unlimited AI diagrams and dedicated support.

Compared to Lucidchart ($7.95/user/month for Individual), Eraser is more expensive but offers AI generation and a code-first workflow that Lucidchart lacks. Compared to Miro ($8/member/month for Starter), Eraser is more specialized for technical diagrams but less versatile as a general collaboration tool.

Who Should Use Eraser

Eraser is built for software engineers, architects, and technical leads who create architecture diagrams and design documents. If you spend time drawing system diagrams for design reviews, onboarding docs, or technical RFCs, Eraser makes that process significantly faster.

It is particularly valuable for teams that value documentation-as-code and want diagrams that stay current with their codebase through the GitHub integration.

It is less suitable for non-technical teams who need general whiteboarding (Miro or FigJam would be better), teams creating primarily business process diagrams rather than technical architecture, or organizations that need offline-first tools.

Alternatives

Lucidchart

Lucidchart is the most established cloud diagramming tool with extensive template libraries and enterprise integrations. Starting at $7.95/user/month, Lucidchart offers broader diagram types and stronger collaboration features. Choose Lucidchart for general-purpose diagramming across business and technical teams. Choose Eraser for developer-focused, AI-powered technical documentation.

Mermaid

Mermaid is a free, open-source diagram-as-code tool that renders in markdown files and GitHub READMEs. Mermaid is free and widely supported but produces basic-looking diagrams with limited layout control. Choose Mermaid for simple inline diagrams in documentation. Choose Eraser for polished, AI-generated diagrams with a dedicated editor.

Excalidraw

Excalidraw is a free, open-source whiteboarding tool with a hand-drawn aesthetic. It is excellent for quick sketches and brainstorming but lacks AI generation and code-based diagramming. Choose Excalidraw for informal sketching. Choose Eraser for structured technical documentation that needs to look professional.

Bottom Line

Eraser is the best diagramming tool for engineers who think in code rather than drag-and-drop. The AI generation is genuinely useful for getting a first draft of an architecture diagram in seconds, and the code-based approach keeps diagrams maintainable as systems evolve. The Eraserbot GitHub integration is a smart differentiator that addresses the real problem of stale documentation. The main limitations are the per-user pricing that adds up for larger teams, the 40 AI diagram limit on Starter (you will hit this if you use DiagramGPT heavily), and the narrow focus on technical diagrams rather than general whiteboarding. For engineering teams that take documentation seriously, Eraser is worth the investment.