IcePanel
IcePanel is a collaborative software-architecture diagramming and modelling tool built around the C4 model.
What IcePanel is
IcePanel is a collaborative software-architecture diagramming and modelling tool built around the C4 model. It provides context, app, and component diagrams, with real-time collaboration for architects, technical leads, and developers. Its model-based structure keeps changes synchronized across diagrams and lets users move between levels of architectural detail. Message flows and tags can be layered onto existing diagrams to show sequences or alternate perspectives. Teams can prepare drafts of future-state designs and merge approved work into the current model. Integrations include an API and SDK, MCP connections for Claude, Cursor, Codex, and VS Code, webhooks, and embeds for Confluence, Notion, SharePoint, and Miro. Read-only share links can be password- or SSO-protected. IcePanel runs on web and API platforms, supports version history, and exports PNG, PDF, JSON, CSV, HTML, LLMs.txt, PlantUML, and Mermaid files. Imports accept JSON and YAML. Plans include Free, Growth at $40 a month billed annually, Scale at $80 a month billed annually, and Enterprise with unlisted pricing. A 14-day trial is available.
Good
- C4-based context, app, and component diagrams
- Real-time collaboration for architecture teams
- Synchronized models across diagram levels
- Future-state drafts can merge after approval
- Broad export and integration options
Watch out
- Free plan limits editors and model objects
- API access starts on Growth and Scale
Who it suits
It suits architects modelling complex systems, plus technical leads and developers communicating architecture. Teams needing shared diagrams, overlays, drafts, or embedded designs may find its model-based workflow useful.
Verdict
IcePanel combines C4 modelling, synchronized diagrams, overlays, and collaboration in one architecture workspace. Check the Free-plan limits and paid plan requirements against your team size and API needs.
Plans and prices
From IcePanel's own pricing page, checked 7 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | 5 editors · Unlimited viewers · Up to 100 model objects · Unlimited diagrams · 2 tag groups · 1 flow per diagram |
| Growth | $40 a month | 1+ editors · Unlimited objects, overlays and flows · Basic API usage · 1 SSO domain · Protected share links · Billed annually |
| Scale | $80 a month | 20+ editors · Advanced API usage · Audit logs · Webhooks · Priority support · Unlimited SSO domains · Billed annually |
| Enterprise | Priced on request | 50+ editors · Custom terms · Custom data residency · Single-tenant environment · Customer encryption keys · Billed annually |
The facts
Each one read from IcePanel's own pages, with the date it was checked.
What it does
- API access
- API access is available on Growth and Scale, with write limits varying by plan.checked 7 Oct 2026
- Architecture models
- Its model-based approach syncs changes across diagrams and supports zooming between levels of architectural detail.checked 7 Oct 2026
- Audience
- IcePanel describes its users as architects designing complex systems and says technical leads and developers can use it to communicate system architecture.checked 7 Oct 2026
- Diagram types
- Context diagrams,app diagrams,component diagramschecked 20 Sep 2026
- Enterprise security
- Enterprise features include a single-tenant environment, custom data residency on GCP, IP or location allow/block controls, custom domains and customer encryption keys.checked 7 Oct 2026
- Flows and overlays
- Users can overlay message flows and tags on existing diagrams to show sequences and different perspectives.checked 7 Oct 2026
- Future design
- Growth includes drafts for future-state designs that can be merged into the current model once approved.checked 7 Oct 2026
- Integrations
- The integrations page lists API/SDK, MCP integrations for Claude, Cursor, Codex and VS Code, webhooks, and embeds for Confluence, Notion, SharePoint and Miro.checked 7 Oct 2026
- Purpose
- IcePanel is a collaborative diagramming and modelling tool for software architecture built around the C4 model.checked 7 Oct 2026
- Real-time collaboration
- Yeschecked 20 Sep 2026
- Security certifications
- The site displays SOC 2, ISO 27001 and GDPR marks in its footer.checked 7 Oct 2026
- Sharing
- Share links provide read-only, up-to-date designs and can be password- or SSO-protected; embeds are supported in Confluence, Notion, Miro and Microsoft SharePoint.checked 7 Oct 2026
- Support
- Scale includes priority support, Slack and Teams support, and four training workshops.checked 7 Oct 2026
The company
- Founded
- 2020checked 28 Sep 2026
- Headquarters
- British Columbia, Canadachecked 28 Sep 2026
Money
- Free plan
- Yeschecked 20 Sep 2026
- Free-plan limits
- The Free plan is limited to five editors and 100 model objects, with two tag groups and one flow per diagram.checked 7 Oct 2026
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