| What it does | Apps and tools for self-hosters and admins
| API sequence diagram tool with payloads on every arrow
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| Stage | Not given
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| Founded | Not given
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| Based in | AT
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| Pricing model | Freemium
| Freemium
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| Pricing | Not given
| Free: editor, local diagrams, share links, SVG and PNG export, CLI, 3 saved diagrams, HAR imports up to 8 requests, 200 hosted API and MCP calls a month, 1 webhook inbox with 25 requests a month, 1 recording link with 3 recordings. Pro: $9/month or $90/year (billed in advance), up to 1,000 saved dia
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| Key features | - Home Assistant voice satellite with on-device wake word detection
- Microsoft Entra ID to Exchange Online contact sync
- Browser-based image editor with layers and WebAssembly
- Self-hosted personal finance tracker
- Proxmox theme pack with hardware sensor overlay
- Home Assistant to-do lists on Android home screen widget
- Android tablet as always-on photo frame
- CalDAV and CardDAV sync for Android
- Grafana dashboards for homelab monitoring
- Windows desktop dashboard for admin tools
| - Plain-text sequence diagram editor with real-time rendering
- Request and response payloads displayed on every arrow
- HAR file import with automatic redaction of secrets
- Webhook inbox to capture and diagram provider deliveries
- Recording links to collect customer HAR files as diagrams
- Drift Check to update diagrams when APIs change
- SVG and PNG export for sharing and embedding
- AI agent support via MCP server, HTTP API and CLI
- README embeds that update when diagrams are edited
- Presentation mode for step-through walkthroughs
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| What makes it different | - Security, transparency and user control prioritized
- Solutions originate from real problems solved in production environments
- Hours of hands-on testing before release
| - No account needed to write and share diagrams
- AI can write diagrams from plain-text syntax
- Built from real traffic: HAR files, webhooks and customer recordings
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
| DR (Domain Rating by Ahrefs) | 29 ● no change since last check | 3 ● no change since last check |
| Trust Flow (Majestic) | 20 | 3 |
| Citation Flow (Majestic) | 21 | 22 |
| Referring domains (Majestic) | 71 | 8 |