SYSTEM DESIGN, VISUALIZED
Diagram your system. Watch the data move.
SysDesign is a drag-and-drop canvas for modern architecture — components, ERDs, and live data-flow animations, right in the browser.
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Built for developers thinking in systems.
Everything you need to sketch an architecture, and nothing you don't.
Drag & drop canvas
Place any of 100+ components on an infinite grid and connect them in seconds.
Animated data flow
Every connection shows a live moving bubble so you can see how requests travel through your system.
ERD with cardinality
Model databases with tables, primary keys, foreign keys, and one-to-many relationship markers.
Tabs and auto-save
Keep multiple diagrams open at once. Everything saves automatically in your browser.
Every building block you need.
From load balancers to ER tables — 100+ components grouped the way you already think.
Clients & Devices
UserBrowserMobile AppDesktop AppIoT Device+1 more
Compute & Servers
Web ServerAPI GatewayLoad BalancerLambdaMicroservice+5 more
Storage & Databases
SQL DatabaseNoSQL DatabaseObject StorageData WarehouseData Lake+3 more
Caching
CacheRedisCDNBrowser Cache
Messaging & Events
Message QueuePub/SubEvent BusWebhook+2 more
Networking & Infrastructure
InternetDNSFirewallVPCRegion+2 more
Security & Identity
Auth ServiceWAFEncryptionSecrets ManagerOAuth+2 more
Monitoring & Observability
LoggingMetricsAlertingTracing+2 more
Data Processing
ETL PipelineSearch EngineGraph DatabaseTime-Series DB+1 more
External Services
3rd Party APIEmailSMSPayment Gateway+3 more
Entity Relation
Table
HTTP Helpers
GETPOSTPUTDELETEStatus codes
Simple pricing.
Free while we build. Pro unlocks sync when accounts arrive.
Free
$0forever
- Unlimited local diagrams
- 100+ system design components
- ERD tables with cardinality
- Animated data-flow connections
- Auto-save in your browser
Pro
$8/month
- Everything in Free
- Account sync across devices
- Priority support
- Early access to new features
Frequently asked questions.
Short answers to common questions.
Do I need an account?
No — SysDesign is fully usable without signing in. Accounts arrive alongside Pro.
Where are my diagrams stored?
In your browser's local storage. They stay on your device and persist between visits. When accounts launch, you will be able to sync them to your account.
Can I export my diagrams?
Export is not available yet. It is on the roadmap.
What does the animated dot on connections mean?
It represents data moving through your system — a live visual indicator of the path you have designed. It is purely illustrative and does not send or receive real traffic.
When does Pro launch?
Soon. Pro unlocks unlimited diagrams alongside everything already in the free tier.