Now in closed beta

Cloud Load Testing Tool for APIs & Web Apps

Design, run, and analyze performance tests with real-time metrics and distributed global traffic generation — on targets you own and verify.

No credit card required · Verified targets only · Cancel anytime

rampstorm.com/runs/checkout-spike

Requests/sec

2,847

P95 latency

118ms

Error rate

0.3%

Success

99.7%

Latency percentiles

p50p95p99
Rampstorm API load testing dashboard showing real-time latency percentiles
browse · 70%GET /home200 ×19.1k
checkout · 30%POST /cart404 ×13.2k

Interactive demo

Build and run a test without writing code

Change the target, traffic, duration, and regions. Then run a safe browser preview and watch the dashboard respond.

Test builder

No scripts or infrastructure required

Preview only
Traffic regions

Live dashboard preview

GET https://api.example.com/health

Ready

Requests/sec

137

P95 latency

82ms

Error rate

0.1%

Requests over time

IAD · FRA
Simulated live request rate chart
Test progress0%

Built on the infrastructure serious teams rely on

KubernetesPostgreSQLTimescaleDBNATSPrometheusGrafanaTerraform

Capabilities

Real-time metrics for confident API load testing

Real load, real numbers, and guardrails that keep every run safe — from a quick smoke test to a full production spike.

Real-time load test metrics

p50 / p95 / p99 latency, RPS, and error rates stream to your dashboard the instant each agent fires — no batch delay, no refresh.

Distributed cloud load agents

Spin up stateless load agents across regions and generate realistic global traffic in seconds.

Verified API targets only

Every target is proven yours via DNS TXT or HTTP header token before a single request leaves an agent.

Built-in load test guardrails

Max RPS and max duration are enforced at the orchestrator — not just the UI — so a test can never run away from you.

How it works

Start distributed load testing in three steps

No agents to install, no infrastructure to babysit. Verify, configure, and watch the metrics roll in.

01

Verify your API target

Prove ownership with a DNS TXT record or HTTP header token. No verification, no traffic — ever.

02

Design your API load test

Set your RPS ramp, duration, regions, and request scenarios. Rate guards keep every run inside safe limits.

03

Analyze real-time metrics

Stream latency percentiles, throughput, and errors in real time as agents fire across the globe.

Tests as code

Reviewable API load tests as code

Describe the storm once and replay it on every release. Targets, ramps, regions, and safety guards live in one readable spec — version it, diff it, ship it.

  • Verified targets enforced at run time
  • Guard rails checked before launch
  • Reusable across staging and prod
checkout-spike.loadtest.yaml
1test: checkout-spike
2target: api.acme.io        # verified ✓
3regions: [iad, fra, sin]
4profile:
5  ramp:  0 → 50k rps
6  over:  2m
7  hold:  5m
8guards:
9  max_rps: 50000
10  max_duration: 10m

Product tour

See the complete workflow before you sign up

Watch how a request becomes a distributed load test, live metrics, and a report your team can act on.

Try the interactive demo

Built so it can’t be weaponized

Every target is verified before any traffic flows, and orchestrator-level rate guards cap RPS and duration on every run. Power-tested, never a DDoS tool.

Distributed by design

Generate load from global cloud regions

Spin up stateless agents around the globe and storm your target from the geographies your users actually come from.

IADFRASINGRUNRTSFO
IAD
FRA
SIN
GRU
NRT
SFO

Load testing performance at a glance

48,200,000

Requests generated

126,400

Tests run

94ms

Avg p99

Pricing

Cloud load testing plans that scale with you

Every plan includes verified targets and orchestrator-level rate guards. Upgrade for more regions, higher ceilings, and longer runs.

Closed beta — every plan is free right now. Lock in early access; paid plans arrive after launch.

Hobby

For side projects and quick sanity checks.

Free

Free during the beta

  • 1 region
  • Up to 1k RPS
  • 10-minute max runs
  • 3 saved tests
  • Community support
Most popular

Team

For teams shipping to production with confidence.

Freethen $79 per month

Free during the beta

  • 5 regions
  • Up to 50k RPS
  • 60-minute runs
  • Unlimited saved tests
  • Real-time collaboration
  • 30-day metric retention
  • Priority support

Enterprise

For SREs running load at serious scale.

Customlet’s talk
  • All regions
  • Custom RPS ceilings
  • SSO / SAML & audit logs
  • Dedicated agent pools
  • SLA & white-glove onboarding
Compare all plan features

FAQ

Cloud load testing questions, answered

What is load testing?

Load testing simulates many concurrent users hitting your app so you can measure latency, throughput and error rates under stress — and find your breaking point before real traffic does.

Is Rampstorm free?

Yes. Every plan is free during the closed beta, including distributed regions and live metrics. Paid plans arrive after launch, and the Hobby tier stays free forever.

How do you stop it being abused?

You must prove ownership of every target with a DNS TXT record or HTTP header token before any traffic is sent, and orchestrator-level rate guards cap RPS and duration on every run.

Can I generate traffic from multiple regions?

Yes. Rampstorm spins up stateless load agents across regions on demand, so you can test your target from the geographies your users actually come from.

Do I need to install anything?

No. Rampstorm is fully cloud-based — no agents to install and no infrastructure to manage. Define a test, verify your target and hit run.

Find your breaking point before your users do

Join the closed beta and run your first storm in minutes.

Compare plans