Eraser vs ThinkComposer
Eraser
eraser.ioThinkComposer
thinkcomposer.comSide by side
| Figure | Eraser | ThinkComposer |
|---|---|---|
| Price from | $15/mo | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | — | Yes |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 4 | 0 |
| Spec score · Diagramming Software | 9.1 (#3) | 6.8 (#44) |
| Spec score · Diagramming tools | 9.1 (#4) | 6.8 (#44) |
| Diagram types | The documented diagram-as-code types are flow charts, entity-relationship diagrams, cloud architecture diagrams, sequence diagrams and BPMN diagrams. | concept maps,mind maps,flowcharts,use case diagrams,class diagrams,sequence diagrams,timelines,data models,organizational charts,business models,genealogy trees |
| Free plan | Yes | Yes |
| Intended users | Eraser presents use cases for enterprise architects, DevOps teams, technology consultants, and software engineers. | The product manual names professionals, academic people, students, and people or teams who use visual tools or need graphic means for their work as intended users. |
Plans
In their own words
Eraser
Eraser is a diagramming tool for technical teams that generates diagrams from prompts, code, files, and private Git repositories. It supports flow charts, entity-relationship diagrams, cloud architecture diagrams, sequence diagrams, and BPMN diagrams. Generated diagrams can be adjusted with diagram-as-code or AI edits, and reference libraries can align output with company building blocks. Collaboration includes real-time work, comments, tagging, and unlimited free guests. The service lists GitHub, Notion, Confluence, and a VS Code extension, as well as live diagram embeds and Git-powered updates. The free plan includes 3 files, 3 AI diagrams, and 7-day version history. Starter costs $15 a month when billed annually, or $20 monthly; it adds unlimited files, private files, and API calls. The diagram API is for paid users, while MCP operations are subject to plan AI-credit limits. Eraser says it is SOC 2 Type 2 certified, performs annual penetration testing, and does not train AI models on customer content. Enterprise deployment options include multi-tenant, single-tenant, and self-hosted setups.
ThinkComposer
ThinkComposer has no write-up on Specifiction yet; its figures are above.