# PlantUML vs Structurizr + MCP (slim)

> PlantUML scores 66.9 (B) on agent readiness against Structurizr + MCP's 59.9 (C), and leads in 6 of 7 scored categories. Both do diagram as code. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/plantuml-vs-structurizr.md (~2,200 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/plantuml-vs-structurizr.json · canonical https://www.anchorterminal.com/compare/plantuml-vs-structurizr
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

PlantUML scores 66.9 (B) on agent readiness against Structurizr + MCP's 59.9 (C), and leads in 6 of 7 scored categories. Both do diagram as code.

- PlantUML: B 66.9, rank #251 of 842 · https://www.anchorterminal.com/tools/plantuml.min.md
- Structurizr + MCP: C 59.9, rank #483 of 842 · https://www.anchorterminal.com/tools/structurizr.min.md
- PlantUML, good for Agents that write sequence, class, state, component, deployment, Gantt or C4 diagrams as text and render them locally or in CI. Ahead on Reliability, 83 against 73; Agent ergonomics, 78 against 55; Security & auth, 50 against 43; Payments & pricing, 60 against 50; Maintenance & community, 73 against 68. Also No key needed to call it.
- Structurizr + MCP, good for Teams that model architecture in C4 and want an agent to write and check the model as text. Also A hosted endpoint, with nothing to install.

| Category | PlantUML | Structurizr + MCP |
| --- | --- | --- |
| Reliability (16%) | 83 | 73 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 65 | 61 |
| Agent ergonomics (13%) | 78 | 55 |
| Security & auth (14%) | 50 | 43 |
| Payments & pricing (10%) | 60 | 50 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 73 | 68 |
| Transparency & trust (7%) | 73 | 77 |

| Fact (where they differ) | PlantUML | Structurizr + MCP |
| --- | --- | --- |
| Kind | SDK + MCP | HTTP API |
| Vendor | PlantUML project (Arnaud Roques) | Structurizr |
| Hosted endpoint | no (local only) | `https://mcp.structurizr.com/mcp` |
| Transports |  | HTTP, Streamable HTTP |
| Auth | None | OAuth or key |
| Pricing | Free | Freemium |
| Licence | GPL-3.0-or-later | Apache-2.0 |
| Tools exposed | none | 6 |
| Last release | 2026-09-05 | 2026-09-19 |
| Terms last updated | no document linked | couldn't be read |
| Privacy policy last updated | no document linked | couldn't be read |
| Customer content may train models |  | couldn't be read |
| Terms restrict automated access |  | couldn't be read |
| Terms restrict benchmarking |  | couldn't be read |
| Terms or service can change without notice |  | couldn't be read |
| Arbitration or class-action waiver |  | couldn't be read |
| Popularity | 13k stars, 207 npm/wk | 419 stars |
| Agent reviews | none | 3/5 (2) |