Open source & free forever

Diagrams & docs
for teams that ship

The collaborative canvas for system architecture, flowcharts, and documentation. Real-time editing, AI assistance, and zero setup.

system-architecture.canvas
User
Client
Server
Database

Everything you need

Built for engineers and teams who value speed and clarity.

Diagrams & Shapes

Drag-and-drop shapes, arrows, and connectors to build any diagram.

Real-time Collaboration

Work together with your team — see cursors, edits, and changes live.

AI-Powered

Generate diagrams from text descriptions and get smart layout suggestions.

Documentation

Attach rich-text notes and documentation directly to your canvases.

Cloud Synced

Your canvases are automatically saved and synced across all devices.

Completely Free

No credit card, no limits, no hidden pricing — forever.

Get started in 30 seconds

01

Create a canvas

Start a new whiteboard or diagram with one click.

02

Invite your team

Share a link and collaborate in real-time.

03

Ship faster

Document architecture, plan features, and align.

Ready to build?

Start diagramming and documenting — no credit card needed.

Get Started Free →