No-code performance testing

Load test your API without writing scripts.

Stabula helps teams simulate real user traffic and test API performance without writing code. Build the flow, pick the test type, read a report your whole team understands.

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Free plan · no card · nothing to install

Latest run

Checkout scenario

Passed

All 2 targets met and every check passed. Simulated 40 users for 5 minutes as a load test.

Requests/sec
184.2
p95 response
219 ms
Error rate
0.02%
Checks
48 of 48
  • p95 response time was 219 ms, within the 500 ms target.
  • Error rate was 0.02%, within the 1% target.

The problem

Performance testing gets postponed until something breaks.

It takes specialist knowledge, scripts, runner setup, and the patience to read low-level metrics. Most teams find their capacity limit from a production incident.

  1. 01

    Normal users cannot write load-test scripts.

  2. 02

    Developers do not want to maintain test scripts for every API flow.

  3. 03

    Existing tools are too developer-heavy, too broad, or too monitoring-focused.

  4. 04

    Reports are hard for non-specialists to understand.

  5. 05

    Teams lack a simple way to model real user API journeys.

How it works

Performance testing that feels like building a flow.

Nobody writes a script.

  1. 1

    Create requests

    Reusable API requests, grouped by area of your product. Test the connection before you rely on one.

  2. 2

    Build a scenario

    Drag requests into an ordered flow that models a real user journey, step by step.

  3. 3

    Set the load

    Choose a test type, then adjust users, duration, ramp up and ramp down, and the targets that decide pass or fail.

  4. 4

    Run and read

    Stabula builds the test, runs it in an isolated runner, and returns a report in plain language.

Test types
Load: Ramps up to the users you set, holds there, ramps down.
Stress: Climbs past the users you set until something gives.
Spike: Jumps to three times the users in seconds, then drops.
Soak: Holds a steady load for a long stretch to find slow leaks.
Smoke: One user, up to a minute, to prove the flow works at all.

Reports

A report a non-specialist can read, that an engineer still trusts.

Results arrive while the run is still going. What is left at the end is a page of sentences: what passed, what missed, and how it compares with the run before it.

  • A verdict in words: passed, or which targets it missed and by how much.
  • Targets and checks listed per step, one by one, met or missed.
  • Compared with your pinned baseline, or the run before it if you pinned none.
  • What went wrong named plainly: DNS, timeouts, refused connections, TLS.
  • Send the report to someone who has no Stabula account, by link.

Checkout scenario

Passed Run #15 40 users · 5 min · Load

Passed. All 2 targets met and every check passed.

Requests/sec
184.2
p95 response
219 ms
Error rate
0.02%
Checks
48 of 48

Targets and checks

  • Checkout: p95 response time was 219 ms, within the 500 ms target.
  • Checkout: error rate was 0.02%, within the 1% target.
  • Checks: 48 of 48 responses returned status 200.

Compared with the pinned baseline #14

About the same as the pinned baseline (p95 219 ms vs 204 ms, +7%).

▸ Run details Nothing went wrong during this run.

Where Stabula sits

Not a script editor. Not an API platform. Not a monitor.

Script-based

k6, JMeter, Gatling

Powerful, but every flow is code someone has to write and maintain.

API lifecycle

Postman and friends

Broad and lifecycle-oriented. Performance is a side feature.

Monitoring

Synthetic platforms

Built around scheduled checks of what is already live.

The wedge

Stabula

A no-code flow builder for API performance tests, run for you in an isolated runner.

  • No script editor, ever. The runner is a detail you never touch.
  • Scenario steps stay independent from your reusable requests.
  • Human-readable reports are first-class, not an export.
  • Every run is isolated in its own container with strict limits.

Who it's for

Teams shipping API-heavy products without a performance engineer.

  • SaaS teams with API-heavy products
  • QA teams that need repeatable performance checks
  • Product engineering teams without a performance engineer
  • Agencies building or maintaining APIs for clients
  • Startups that need confidence before a launch or traffic spike

Pricing

Priced in VU-minutes, not runner complexity.

A VU-minute is one simulated user for one minute. Every plan includes a monthly allowance and a cap on simulated users.

See full pricing →

Free

Start here

$0/month

  • Up to 10 simulated users
  • 60 VU-minutes a month
  • 1 concurrent run
  • 1 team member
  • Reports carry a Stabula note
Start free

Growth

Most teams

$79/month

  • Up to 200 simulated users
  • 12,000 VU-minutes a month
  • 5 concurrent runs
  • 10 team members
  • Private reports
  • PDF export
  • Scheduled tests
Start with Growth

Enterprise

Platform teams

Custom

  • Custom simulated users
  • Custom VU-minutes
  • Custom concurrency
  • Unlimited team members
  • Private reports
  • PDF export
  • API access
Talk to us

Every paid plan starts on Free. Upgrade from Billing when your tests need more users or VU-minutes.

Find your capacity limit before your users do.

Create a workspace, build one scenario, run it, and read the report. The free plan is enough to prove it.

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