| What it does | Free C4 modeling tool with an MCP server for software teams to share architecture context with AI development tools
| The control layer for AI
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| Stage | Not given
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| Founded | Not given
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| Based in | LT
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| Pricing model | Freemium
| Freemium
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| Pricing | Browser: Free with account. Desktop: €10 a month after 7-day free trial, one licence covers 3 machines. Enterprise: custom pricing.
| Free plan: €0/month with 10,000 proofs included per month. Starter: €59/month with 50,000 proofs, then €0.0015 per proof above. Growth: €249/month with 500,000 proofs, then €0.0005 per proof, then €0.0002 after 2,000,000 proofs. Enterprise: from €990/month or €15,000/year licence with 5,000,000 proo
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| Key features | - System context, container, component, and code diagrams
- Live collaboration on models
- MCP server for AI coding agents
- Change sets for scoped agent work
- Organization SSO
- JSON import and export
- OpenAPI contract export
- Desktop app for macOS, Windows, Linux
- AI assistant for model descriptions
- Installable PWA
| - Wraps AI provider clients with policy enforcement before calls execute
- Enforces provider-level privacy parameters like store=false for OpenAI
- Generates signed, non-reusable ACT tokens for each request
- Maintains append-only, hash-chained ledger for audit verification
- Embedded preference widget with cross-app persistence
- Global Privacy Control signal detection and enforcement
- Fails closed when unreachable; no fallback mode
- Python and Node.js SDKs with source-available licence
- Policies defined in dashboard, not in code
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| What makes it different | - Model elements exist once and appear on every level they belong to
- Endpoints are real OpenAPI documents, not diagram labels
- Desktop app keeps all data local and offline-capable
- Free browser version with no paywall or feature limits
- AI agents read and write architecture through MCP
| - Cryptographic proof of compliance: signed, verifiable tokens and append-only ledger that auditors can verify without vendor involvement
- Policies live in dashboard, never touch code, preventing unauthorized modifications
- Separates user preference control from developer code, ensuring developer cannot alter consent
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 3 ▲ +1 (up) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 10 | 0 |
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| Citation Flow (Majestic) | 28 | 0 |
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| Referring domains (Majestic) | 74 | 0 |
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