Eraser

✓ Verified

★★★★★

(4.4) $45/month Freemium ✓ Free Trial Available

Web API Extension

AI diagram tool for technical teams, creating architecture, ER and sequence diagrams from prompts.

Best For: Engineering teams documenting architecture, databases and system design

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The Verdict: Eraser

Eraser is the strongest pick in this category for engineering teams documenting real systems, because diagram as code plus repo based generation produces diagrams that stay maintainable after the first draft. The free tier is only a sampler and the per member price is high, so it earns its cost in technical teams and is hard to justify for general business diagramming.

What is Eraser?

Eraser generates technical diagrams from text prompts and keeps them in a diagram as code format that you can edit directly or through AI follow up prompts. The tool is aimed squarely at engineering work: cloud architecture diagrams with proper provider icons, ER diagrams, sequence diagrams, flowcharts and system design diagrams that live next to documentation instead of inside a design file.

On paid plans Eraser goes beyond prompts. It can generate diagrams from connected Git repositories and data sources, which gives teams a fast first draft of a current state architecture or data model. Diagrams carry version history, guests can view without a seat, and integrations with VS Code, GitHub, Notion and Confluence place the diagrams where engineering teams already write.

The trade is price and scope. The free plan is a small taste with very few AI credits, and paid plans sit at the premium end of the AI diagram category on a per member basis. In return, teams get the deepest technical feature set here, and business users who need simple visuals will find it more tool than they need.

Who is Eraser Best For?

Engineering teams documenting architecture, databases and system design

Eraser Key Features

AI diagram generation from text prompts

Diagram as code editing alongside the visual canvas

Cloud architecture diagrams with provider icon sets

ER diagrams and data model generation

Sequence diagrams and flowcharts for system behavior

Diagram generation from Git repositories on paid plans

Diagram generation from connected data sources on paid plans

AI edits applied to existing diagrams through follow up prompts

Version history, unlimited on paid plans

Unlimited guests for shared diagrams

VS Code extension for diagrams inside the editor

API access for programmatic diagram generation on paid plans

Eraser Pricing & Plans

Eraser Review Summary

Performance Score	A
Content Quality	Technical diagrams come out structured and accurate in notation, especially architecture and ER work.
Interface	A code plus canvas editor that developers pick up quickly and non technical users may not.
AI Technology	Prompt generation with code level editing, plus repo and data source generation on paid plans.
Purpose	Creating and maintaining technical diagrams for engineering documentation.
Compatibility	Web, API, Extension
Pricing Summary	Eraser starts at $45/month per member on annual billing after a small free plan, with higher tiers adding more AI credits.

Eraser Pros & Cons

✅ Pros

Built specifically for technical diagrams instead of general whiteboarding
Diagram as code keeps diagrams editable, diffable and close to documentation
Repo and data source generation is a real step beyond prompt only tools
Strong architecture icon coverage for cloud systems
Guests are unlimited, so sharing does not force extra seats

❌ Cons

The free plan is very small, with only a handful of AI credits
Paid pricing sits at the premium end of this category
Focused on technical diagrams, so business visuals are limited
Per member billing adds up fast for large teams

FAQs

Is Eraser free to use?

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There is a free forever plan, but it is small: a few files and a few AI credits with a short version history. It works as a trial of the workflow rather than a long term free tier.

How does Eraser pricing work?

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Plans are billed per member, with AI credits included each month and unlimited files on paid tiers. The starting figure is in the pricing summary below, and annual billing costs less than monthly.

What diagrams can Eraser create?

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Cloud architecture diagrams, ER diagrams, sequence diagrams, flowcharts, system design diagrams and data models, all generated from prompts and editable as code.

Can Eraser generate a diagram from my codebase?

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Paid plans can generate diagrams from connected Git repositories and data sources, which is the fastest way to draft a current state architecture view.