SysDes is a visual system design and simulation platform for modeling distributed cloud architectures. It combines design mode, guided development workflows, production-style simulation, and AI-assisted optimization to help engineers test reliability, scalability, and cost trade-offs before deployment.

Voices

What builders say

Short notes from engineers using SysDes for practice and real design discussions.

“Finally a canvas that feels like my interview whiteboard — but with real simulation behind it.”

Priya S.

Senior backend engineer

“Load and latency playback helped me explain bottlenecks in a way reviewers actually bought.”

Arjun M.

Staff engineer

“Interview mode + AI nudges cut my prep time without dumbing down the trade-offs.”

Neha K.

Platform engineer

“Sharing a diagram link beat exporting screenshots for every round.”

Rahul V.

EM — growth team

“The component library matches how I draw LB → API → DB in real interviews.”

Sara L.

Full-stack, fintech

“Local-first means I can iterate on flights without worrying about accounts.”

Dev N.

Indie consultant

“Finally a canvas that feels like my interview whiteboard — but with real simulation behind it.”

Priya S.

Senior backend engineer

“Load and latency playback helped me explain bottlenecks in a way reviewers actually bought.”

Arjun M.

Staff engineer

“Interview mode + AI nudges cut my prep time without dumbing down the trade-offs.”

Neha K.

Platform engineer

“Sharing a diagram link beat exporting screenshots for every round.”

Rahul V.

EM — growth team

“The component library matches how I draw LB → API → DB in real interviews.”

Sara L.

Full-stack, fintech

“Local-first means I can iterate on flights without worrying about accounts.”

Dev N.

Indie consultant

“Finally a canvas that feels like my interview whiteboard — but with real simulation behind it.”

Priya S.

Senior backend engineer

“Load and latency playback helped me explain bottlenecks in a way reviewers actually bought.”

Arjun M.

Staff engineer

“Interview mode + AI nudges cut my prep time without dumbing down the trade-offs.”

Neha K.

Platform engineer

“Sharing a diagram link beat exporting screenshots for every round.”

Rahul V.

EM — growth team

“The component library matches how I draw LB → API → DB in real interviews.”

Sara L.

Full-stack, fintech

“Local-first means I can iterate on flights without worrying about accounts.”

Dev N.

Indie consultant

“Finally a canvas that feels like my interview whiteboard — but with real simulation behind it.”

Priya S.

Senior backend engineer

“Load and latency playback helped me explain bottlenecks in a way reviewers actually bought.”

Arjun M.

Staff engineer

“Interview mode + AI nudges cut my prep time without dumbing down the trade-offs.”

Neha K.

Platform engineer

“Sharing a diagram link beat exporting screenshots for every round.”

Rahul V.

EM — growth team

“The component library matches how I draw LB → API → DB in real interviews.”

Sara L.

Full-stack, fintech

“Local-first means I can iterate on flights without worrying about accounts.”

Dev N.

Indie consultant

Free & open source

Self-host the full studio for ₹0 — no subscription, no payment gate. Fork the repo and run it anywhere.

Open source

Open Studio

SysDes is open source — clone, run locally, and use the full studio with no paywall.

₹0/ month

Forever self-hosted · no card

Full studio — designs, simulation, scoring & interview mode
Fork, extend, and self-host; all core features stay free

Open Studio

Open source — use and modify the project under the terms of its repository license.

FAQ

Licensing, privacy, AI, and how SysDes compares to a plain canvas—before you open the studio.

Ready to draw your next system?

No signup for local use — open the studio or star the repo on GitHub.

Open studio Star on GitHub