Eraser AI

Eraser AI is a technical diagramming and documentation tool aimed at software engineers. Its core idea is "diagram-as-code": diagrams are backed by a text definition, so the AI generates editable code rather than a fixed image. From a natural-language prompt or a pasted code snippet or schema, it produces architecture diagrams, sequence diagrams, flowcharts, ERDs and cloud diagrams that you can then refine by hand or with further AI edits. A free, no-login sandbox called DiagramGPT lets you try the text-to-diagram flow before committing.

Beyond one-off generation, Eraser positions itself as a place to keep engineering documentation current. Diagrams sit alongside markdown design docs, and an Eraserbot/GitHub integration can regenerate codebase diagrams as the code changes — the feature behind the "live diagrams that update automatically" pitch. In practice this is more of an assist than a guarantee: how cleanly diagrams track a repo depends on its structure, and output generally warrants a review pass. There is also a VS Code extension and API for teams that want to pull diagramming into existing workflows.

It fits best for teams that already write design docs and want architecture visuals versioned and reviewed like code, rather than trapped in a static whiteboard. The trade-offs are familiar SaaS ones: AI generations are credit-capped on lower tiers, per-user pricing scales up for bigger teams, and it is not a general-purpose freeform canvas like Miro or FigJam. Founded in 2020 and backed by a 2021 seed round, Eraser competes with tools like Mermaid-based workflows, Lucidchart and other AI diagram generators.