What exactly does Stresix run?

A run provisions a target server and a k6 shooter, applies the load over a private network, streams telemetry to the workspace, and removes both servers when the run ends.

Do I need to install anything?

No. Point Stresix at a Docker image, a repository, or a registry push and the test runs on infrastructure you never touch directly.

Is my app exposed to the public internet during a run?

No. The target has no public address, so the app under test is only reachable from the private network that also carries the load.

What happens if a run crashes?

An aborted or failed run tears down the servers and refunds the charged credits. The hard stop at the end of the run window does the same.

How much does a run cost?

One credit costs $2: a Standard run spends one credit ($2), a Massive run spends three ($6). Launch campaign codes grant credits free now, and paid checkout opens at launch.

Real measured runs

stop guessing your specs. start knowing them.

you just shipped it. it works, it's yours, you're hyped. then it hits you: what do i even host this on. so you guess. and guessing costs you either way. overbuy and you're bleeding money every month on a server your app will never touch. underbuy and the first real traffic spike takes you down, right when people are actually looking. then you upgrade. that upgrade is a new server. that new server is more money. you do this dance every time your app grows, and every round of it is a round you paid for.

Start a load test See the workflow

Real measured run

Reference signal

2,847 concurrent users before it bends

050%ceiling

p95288 ms

error rate8.00%

Who this is against

hosting providers don't want you to know your real number.

"just in case" is a business model. the bigger the box you're scared into buying, the bigger the invoice, every month, whether you use it or not. nobody in that chain has a reason to tell you the truth about what you actually need, because the truth doesn't make them more money. we're not selling you the server. we're telling you the number so you stop paying for fear.

A measured result, not a guess

here's an actual run.

reference target, completed run. this is what stresix actually caught, not a mockup.

A measured result, not a guess

Reference target, completed run

Completed

2,500 peak VUs

050%ceiling

p95 latency288 ms

error rate8.00%

p95normal response timep99the tail, the requests that make people leaveErrorsfailed requests, countedNextthe setup you actually need

How it actually works

no black box. three decisions, that's the whole thing.

most load testing tools hand you a wall of metrics and call it done. cool, now you've got a dashboard and still no idea what to click deploy on. stresix skips the homework.

Watching it bend

Live run in progress

2,847 concurrent users

050%ceiling

i built this because i lived the tango myself. overbought a box for a project that got maybe 40 visitors a day and paid for months of headroom nothing ever touched. underbought the next one and watched it fall over on the one day it actually mattered. did that loop enough times that i got sick of guessing and just built the thing that tells you the number instead.

i'm not trying to sell you a bigger server or lock you into a hosting provider. i want you to spend the least amount of money that keeps your app up. that's the whole product.

Choose your ceiling

pick the question you're actually asking.

you're not testing for fun, you're testing so you stop overpaying or underbuilding. pick the load that matches what's keeping you up at night.

Standardmost used

2,500 concurrent users10 minute window

the baseline every real production app needs before it's live for real people.

050%ceiling

Massive

10,000 concurrent users15 minute window

for launch day. for the post that blows up bigger than you planned. for the spike you can't predict but should still know the cost of surviving.

050%ceiling

Choose Standard

Your workspace starts here

run the number they don't want you to guess at.

you already know you should be testing before you ship. every day you don't, you're one traffic spike away from finding out the hard way, on a server you either overpaid for or underbought. save a target, pick a load, get a number you can actually deploy on.

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