Eraser
Eraser.io turns text prompts into editable diagrams and syncs docs with GitHub via Eraserbot. Compare 2026 pricing from Free to Enterprise here.
About Eraser
What is Eraser (2026 update)
Eraser is an AI co-pilot for technical design and documentation, built around a whiteboard where diagrams can be created as code, edited as text, or refined with AI prompts. It targets engineering teams that need to draw system architecture, sequence diagrams, and technical docs without leaving a developer-friendly workflow.
What is new in 2026
Eraser’s AI diagramming has moved further into automated documentation. Eraserbot now watches private Git repositories and automatically updates architecture diagrams when the underlying codebase changes, so documentation stays in sync without a manual redraw. The platform also exposes a Diagramming API for connecting Eraser to existing data pipelines and internal tools, and its AI diagram generator (built on GPT-4 class models) has been refined to produce diagram-as-code output that teams can tweak on the canvas or by editing text directly.
Key features
- AI Diagrams that generate architecture, sequence, and flow diagrams from a text prompt
- Diagram-as-code editing, so diagrams can be adjusted by editing text instead of dragging shapes
- Eraserbot, which automatically updates diagrams in READMEs when connected repositories change
- A Diagramming API for embedding AI diagram generation into other workflows
- Native integrations with GitHub, Notion, Confluence, and VS Code
- A collaborative whiteboard with version history for team review
Pricing in 2026
Eraser uses a per-member monthly price with an AI diagram quota attached to each tier. Paid plans also support usage-based pricing to buy extra AI credits beyond the plan limit.
| Plan | Price | What you get |
|---|---|---|
| Free | Free | 3 files, 3 AI diagrams, 7-day version history, unlimited guests |
| Starter | $15/member/month billed annually ($20/month billed monthly) | Unlimited files, 40 AI diagrams, 90-day version history, private files, 20 custom icons, API access |
| Business | $45/member/month billed annually ($60/month billed monthly) | 250 AI diagrams, unlimited version history, SAML SSO, 100 custom icons, reference diagrams |
| Enterprise | Custom | Unlimited files and AI diagrams, flexible deployment, customer success manager, ACH and wire billing |
Who should use it
Eraser fits engineering teams and technical writers who need to keep architecture diagrams current as code changes, particularly teams already living in GitHub, Notion, or Confluence. It also suits solo developers or small teams who want a quick way to turn a written system description into a clean diagram without manual drawing. Product managers who need to review system design alongside engineers can benefit too, since diagrams stay readable as text as well as visuals, which makes async review easier than a purely visual whiteboard tool.
Teams doing regular design reviews or RFC-style documentation will get the most value from the Starter or Business tier, since the free plan’s 3-diagram limit is really only enough for a quick trial. Larger organizations that need SSO, unlimited version history, and audit-friendly usage reporting should plan for the Business or Enterprise tier from the start rather than outgrowing Starter quickly.
Limitations and alternatives
The free plan’s 3-diagram cap is tight for anyone doing regular technical documentation, and AI diagram quotas on paid tiers can be used up quickly on complex systems, pushing teams toward usage-based add-on credits. Eraser is also narrower in scope than general whiteboard tools, since it is built specifically around technical and code-adjacent diagramming rather than freeform visual brainstorming. If you need a broader whiteboard or different diagram styles, consider these alternatives:
- Lucidchart, for general-purpose flowcharts and broader diagram templates
- Miro, for open-ended team whiteboarding beyond technical diagrams
- Mermaid (with an editor like Mermaid Chart), for developers who prefer writing diagram code directly without a full SaaS platform
Frequently asked questions
Does Eraser have a free plan?
Yes, Eraser's free plan includes 3 files, 3 AI diagrams, and 7-day version history, with unlimited free guests on any plan.
What is Eraserbot?
Eraserbot is Eraser's automation that watches connected Git repositories and updates architecture diagrams in your documentation when the underlying code changes.
Can I edit Eraser diagrams as code?
Yes, Eraser generates diagram-as-code, so you can adjust diagrams by editing text or refining them with an AI prompt instead of only dragging shapes on a canvas.
What are good alternatives to Eraser?
Lucidchart and Miro are common alternatives for broader diagramming and whiteboarding, while Mermaid Chart suits developers who want a lighter, code-first diagram tool.
Information last verified: September 2026.
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