IcePanel

Name: IcePanel
Author: IcePanel

by IcePanel

Free plan APIWeb

Visit IcePanel Alternatives Pricing

What IcePanel is

IcePanel is a collaborative modelling and diagramming tool for software architecture built around the C4 model. It supports context, app, and component diagrams, and teams can work together in real time. Its model-based approach syncs changes across diagrams and lets users move between levels of architectural detail. Message flows and tags can be overlaid to show sequences and different perspectives. Teams can draft future-state designs and merge them into the current model after approval. Read-only share links show current designs and can be protected by password or SSO; embeds are available for Confluence, Notion, Miro, and SharePoint. Integrations include an API and SDK, MCP connections for Claude, Cursor, Codex, and VS Code, and webhooks. The Free plan costs nothing, with five editors, unlimited viewers and diagrams, and up to 100 model objects. Growth is $40 a month billed annually; Scale is $80 a month billed annually.

Who it suits

IcePanel suits architects modelling complex systems, as well as technical leads and developers who need to communicate architecture. Its sharing and collaboration options can serve teams working across design and implementation.

What it does well

Supports context, app, and component diagrams
Changes sync across diagrams
Real-time collaboration
Read-only share links can use password or SSO
Free plan includes unlimited diagrams and viewers

What to know first

Free plan limited to five editors
Free plan capped at 100 model objects
Growth API access is basic

Plans

Plan	Billed and limits	Price
Free	5 editors · Unlimited viewers · Up to 100 model objects · Unlimited diagrams · 2 tag groups · 1 flow per diagram	Free
Growth	Billed annually · 1+ editors · Unlimited objects, overlays and flows · Basic API usage · 1 SSO domain · Protected share links	$40 a month
Scale	Billed annually · 20+ editors · Advanced API usage · Audit logs · Webhooks · Priority support · Unlimited SSO domains	$80 a month
Enterprise	Billed annually · 50+ editors · Custom terms · Custom data residency · Single-tenant environment · Customer encryption keys	On request

As icepanel.io lists them, read 7 Oct 2026. The maker's own page has the final word.

Verdict

IcePanel connects C4-style diagrams through a shared model and supports collaboration, overlays, and share links. The Free plan has editor and object caps; paid plans are billed annually.

Facts from IcePanel's own pages

API access: API access is available on Growth and Scale, with write limits varying by plan. · icepanel.io, 7 Oct 2026
Architecture models: Its model-based approach syncs changes across diagrams and supports zooming between levels of architectural detail. · docs.icepanel.io, 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. · forms.icepanel.io, 7 Oct 2026
Diagram types: Context diagrams,app diagrams,component diagrams · icepanel.io, 20 Sept 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. · icepanel.io, 7 Oct 2026
Flows and overlays: Users can overlay message flows and tags on existing diagrams to show sequences and different perspectives. · icepanel.io, 7 Oct 2026
Founded: 2020 · icepanel.io, 28 Sept 2026
Free plan: Yes · icepanel.io, 20 Sept 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. · icepanel.io, 7 Oct 2026
Future design: Growth includes drafts for future-state designs that can be merged into the current model once approved. · icepanel.io, 7 Oct 2026
Headquarters: British Columbia, Canada · icepanel.io, 28 Sept 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. · icepanel.io, 7 Oct 2026
Purpose: IcePanel is a collaborative diagramming and modelling tool for software architecture built around the C4 model. · developer.icepanel.io, 7 Oct 2026
Real-time collaboration: Yes · icepanel.io, 20 Sept 2026
Security certifications: The site displays SOC 2, ISO 27001 and GDPR marks in its footer. · icepanel.io, 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. · docs.icepanel.io, 7 Oct 2026
Support: Scale includes priority support, Slack and Teams support, and four training workshops. · icepanel.io, 7 Oct 2026