Architecture decisions, under load

Find the failure
before your users do.

ServerSim is a hands-on architecture simulator for designing, load-testing, and reviewing distributed systems before the stakes become real.

No card to exploreSaved in your browser20 components included

Checkout resilience review

HLD · live

Edge

24k rps

API

67% util

Primary

p95 42ms

Fault injected

Cache unavailable

Recovery stays inside the latency budget.

Verdict

Production ready

2 review notes before launch.

The method

A wind tunnel for architecture.

Diagrams explain intent. ServerSim makes that intent answer hard, measurable questions.

Model the real system

Compose clients, gateways, services, queues, caches, databases, and storage into a living architecture map.

Turn traffic into evidence

Set peak RPS, traffic shape, retries, timeouts, and capacity. See throughput, saturation, latency, and rejected load.

Break one thing on purpose

Remove a dependency from the model and watch the blast radius travel through every connected component.

Invite an exacting reviewer

Ask AI to challenge consistency, security, availability, observability, and cost—then accept only the edits you trust.

Walk in with a model, the load assumptions, the failure case, and a review trail. Leave with decisions everyone can inspect.