Eraser and Archway are in the same neighbourhood — both are AI-first diagramming tools aimed at engineers. Eraser bundles markdown notes alongside diagrams; Archway goes deeper on the architecture side: more icons, more export formats, direct GitHub / Terraform integration, and more AI credits per dollar.
| Feature | Archway | Eraser |
|---|---|---|
| AI diagrams | Yes — core | Yes — core |
| Free tier | 5 AI / month, 3 diagrams | 5 AI / month, 3 files |
| Paid entry (annual) | $12/month Pro (monthly billing) | $15/mo Starter (annual), $20 monthly |
| AI credits at paid entry | 50/month | 40/month |
| Team plan | $35/user/mo — 200 AI/user | $45/mo (annual) / $60/mo — 250 AI shared |
| Cloud architecture icons | 1,900+ (AWS 788, Azure 682, GCP 192, K8s 77) | Curated set + 20-100 custom icons on higher plans |
| Diagram-as-code DSL | Proprietary multi-format DSL | Markdown + diagram syntax |
| Markdown notes bundled | No | Yes |
| Generate from GitHub repo | Native — webhook-driven | Via VS Code extension, manual trigger |
| Generate from Terraform / Compose | Yes | No |
| Export: PNG / SVG | Yes — 4x scale PNG, SVG with font fallback | Yes |
| Export: Mermaid, PlantUML, D2, draw.io, Terraform, JSON | Yes — all native | Mermaid + markdown |
| SAML SSO | Enterprise | Business ($45/mo) |
Both are honest AI-first tools for engineers. Archway is stronger on pure architecture (more icons, more integrations, more export formats). Eraser is stronger if you want notes + diagrams in one workspace.