Eraser

Overview

Its mix of code-aware inputs, reusable team references and broad export options makes it a strong fit for engineering groups; the free plan’s three-file and three-AI-diagram caps make it a limited long-term workspace.

Key features

Eraser can generate flow charts, entity-relationship diagrams, cloud architecture diagrams, sequence diagrams and BPMN diagrams from prompts, code, files or private Git repositories. That range suits teams documenting software systems and workflows, while the ability to refine results manually using diagram-as-code or AI edits provides a way to correct and adapt generated diagrams rather than accept them as-is.

Reference libraries let teams steer AI output toward their own building blocks, a useful distinction for organizations that need consistent diagrams across projects. Real-time collaboration includes commenting and tagging, and guests are unlimited on every plan. GitHub, Notion and Confluence integrations, a VS Code extension, live embeds and Git-powered updates connect diagrams to technical workflows.

Exports span PNG, SVG, PDF, PowerPoint, Google Slides, BPMN, Visio, draw.io and Markdown; imports include common image and office formats as well as Draw.io and Visio. The API is for paid users, while the MCP server supports diagram operations from compatible clients within plan AI-credit limits. Eraser says it is SOC 2 Type 2 certified, undergoes annual penetration testing and does not train AI models on customer content.

Pricing

The Free plan costs nothing, forever. It allows three files, three AI diagrams, seven-day version history and unlimited guests. That is enough for a small trial, but the file and generation caps make it a poor fit for a continuing team workspace.

Starter costs $15 / member / mo billed annually, or $20 monthly. It adds unlimited files, 40 AI diagrams, 90-day version history, private files, 20 custom icons and API calls. Starter is the practical entry point for individual contributors or small teams that need private diagrams and API access, though its AI quota still calls for restraint.

Business costs $45 / member / mo billed annually, or $60 monthly. It raises the AI allowance to 250 diagrams, makes version history unlimited, and adds SAML SSO, 100 custom icons and reference diagrams. It is the better fit for teams that need centralized sign-on or consistent, reusable diagram conventions, but the per-member price is a substantial step up from Starter.

Enterprise has custom pricing and includes unlimited files, AI diagrams and version history. Enterprise deployment options include multi-tenant, single-tenant and self-hosted deployments; the plan also includes a customer success manager, with security reports available under NDA. Choose it when deployment requirements or support needs call for those arrangements.

Platforms

Eraser is available on the web, through an extension and API, and as a self-hosted deployment option. The API is restricted to paid users; Enterprise offers deployment choices that include self-hosting.

Who it's for

Eraser is aimed at enterprise architects, DevOps teams, technology consultants and software engineers who need diagrams tied to code, repositories or company-specific reference material. It is less compelling for occasional users who only need a few diagrams, since the free plan caps both files and AI generation, or for teams that do not need technical diagramming and collaboration features.

Pros and cons

• Pros: Generation from code, files and private Git repositories is well suited to technical documentation.
• Pros: Manual editing and reference libraries give teams ways to correct AI output and keep diagrams aligned with shared building blocks.
• Pros: Unlimited guests on all plans and extensive import and export formats ease collaboration and handoff.
• Cons: Free is capped at three files and three AI diagrams, limiting its usefulness beyond evaluation.
• Cons: Private files and API calls start at Starter, while SAML SSO and reference diagrams require Business.
• Cons: Starter’s 40 AI diagrams and Business’s 250 diagrams impose quotas even on paid users.

Alternatives

For a different AI diagram generator, compare Archway, which has a free plan with five AI generations per month and three diagrams. LetDraw offers a free plan capped at three documents, one workspace and three AI prompts. sysdraw is a web option with a free plan of 10 scenes and five AI generations per month. Mermaid Chart includes a free plan with three diagrams, limited AI and one team and project.

For broader diagramming, Creately offers a free plan with unlimited canvases and collaborators, capped at 45 items per canvas. ArchitectureDiagram.ai has a free plan limited to two diagrams per month, with watermarked exports. Nimbalyst is a free alternative with desktop and iOS apps whose code is MIT licensed. OpenFlowKit is another free web option.

Browse AI Diagram Generators for more AI-focused options, or compare the wider Diagramming Software and Diagram Software categories.

Verdict

Eraser is a strong choice for technical teams that want AI-assisted diagrams connected to code and repositories, with editing controls and collaboration built into the same workspace. Its clearest reason to look elsewhere is the cost of scaling: the free tier is tightly capped, paid plans meter AI diagrams, and SSO is reserved for Business.