| What it does | Free C4 modeling tool with an MCP server for software teams to share architecture context with AI development tools
| Evidence of what your AI coding agents did
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| Stage | Not given
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| Founded | Not given
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| Based in | LT
| US
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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 for one developer on their own machine. Team plan $99 a month for up to 10 people. Business plan $199 a month for up to 50 people. All paid plans include unlimited machines, records and reports, support for Claude Code and Cursor, Flag and Block rules, and 13 months of records. 14-day free tria
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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
| - Records commands, file edits, web requests and MCP calls from Claude Code and Cursor
- Hash chain verification to detect changes, gaps or deletions in records
- Block rules to stop matching actions before they run
- PDF and CSV reports for auditors covering up to 13 months
- SOC 2 criteria mapping for security reviews
- Flag rules that mark risky actions out of the box
- Verifiable reports that anyone can check on verify page
- Open-source recorder for local use without account
- Support for unlimited machines per team member
- Automatic background upload with minimal performance impact
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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
| - Hash chain verification ensures records cannot be altered or deleted without detection
- SOC 2 audit-ready reports with six criteria-mapped sections
- Never records prompt text, file contents or command output for privacy
- Block rules stop risky actions before they execute
- Takes under 50ms per action with background uploads
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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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