LoadTester

LoadTester is a modern, cloud-native HTTP and API load testing tool built by Cloud Native d.o.o. that lets engineering teams run high-scale performance tests without the headache of managing infrastructure. It is designed for developers, QA engineers, and DevOps teams who need repeatable, reliable performance checks but refuse to spend days setting up and maintaining complex testing environments. Instead of wrestling with worker orchestration, scaling logic, and scheduling scripts, you simply create a test scenario in your browser or hook it into your CI/CD pipeline, and LoadTester handles the rest. It deploys distributed workers in under three seconds, supports up to 10,000 virtual users and 10,000 requests per second, and pumps live analytics like RPS, p50, p95, p99 latency, and error rates directly to your screen while the test is running. The tool also packs smart guardrails like auto-stop on threshold breaches, run-to-run regression comparisons, scheduled baselines, and webhook integrations for Slack, email, or release bots. Whether you are spike testing a checkout endpoint, validating a new deployment, or catching performance regressions before users notice, LoadTester gives you the speed and clarity to ship with confidence. No bloated setup. No platform ceremony. Just raw, real-time performance data your team can act on.

Instant Execution, Distributed by Default

Stop waiting for infrastructure to spin up. LoadTester boots distributed load tests in under three seconds, automatically scaling workers across the cloud without any manual orchestration or scheduling headaches. You define the test, hit run, and within moments your target endpoint is hammered with the exact request pattern you designed. No queue time, no provisioning delays, no excuses.

Live Real-Time Analytics

Forget waiting five minutes after a test ends to see what happened. LoadTester streams throughput, latency, active users, and error rates to your dashboard in real time while the test is running. You watch p50, p95, and p99 latency curves update live, spot bottlenecks the second they appear, and make on-the-fly decisions without digging through log files.

Smart Auto-Stop with Thresholds

Set failure or latency thresholds before you launch, and LoadTester automatically stops the test when things go sideways. Define rules like "p95 latency must stay under 400ms" or "error rate must remain below 2%," and the tool kills the run instantly when a breach occurs. This saves you from wasting time and resources on broken tests and protects your endpoints from unnecessary load.

CI/CD Ready with Webhooks and Alerts

LoadTester plugs directly into your deployment pipeline. Run tests on every push, compare results against baselines, and trigger Slack or email alerts when regressions exceed 15%. Webhooks let you push result links to release bots, chat channels, or custom workflows, so your entire team stays in the loop without switching tools.

Spike Testing E-Commerce Checkout Flows

Before a major sale or product launch, engineering teams need to know their checkout endpoints can handle a sudden flood of traffic. LoadTester lets you create a spike test targeting the checkout API with thousands of virtual users, watch live latency and error rates, and set auto-stop thresholds to prevent database meltdowns. You get clear proof of capacity before real customers show up.

Continuous Performance Validation in CI/CD

Every deployment carries the risk of introducing latency regressions or breaking performance SLOs. LoadTester integrates into your CI/CD pipeline to run baseline tests against every build, compare results against previous runs, and automatically notify the team via Slack or email if p95 latency jumps by more than 15%. This catches regressions before they reach production.

Baseline Monitoring for API Endpoints

APIs degrade slowly over time as code changes accumulate and data grows. LoadTester lets you schedule daily or weekly baseline tests for critical endpoints like auth, search, or data retrieval. With run-to-run comparisons and trend charts, you spot gradual performance drift early and fix it before users start complaining about slow load times.

Capacity Planning for New Features

When you are about to launch a new feature with unknown traffic patterns, you need hard numbers on how your infrastructure will behave under load. LoadTester lets you simulate realistic traffic patterns against new endpoints, monitor throughput and latency in real time, and export results as PDF, CSV, or JSON for capacity planning meetings. You ship with data, not guesses.

How quickly can I start my first test?

LoadTester boots distributed workers in under three seconds. After creating a test scenario with your target URL, method, and desired load pattern, you hit run and the test starts almost instantly. There is no infrastructure to provision, no scripts to write, and no waiting for workers to come online.

What kind of load patterns does LoadTester support?

You can choose between virtual users (VUs) or requests per second (RPS) mode. Set a specific rate and duration, or define complex spike patterns. The tool handles up to 10,000 concurrent virtual users and 10,000 requests per second, making it suitable for everything from small API checks to high-scale endpoint stress tests.

Can I integrate LoadTester with my existing CI/CD tools?

Yes. LoadTester is built for automation. You can trigger tests from any CI/CD pipeline using its API, compare results against historical baselines, and configure webhooks to send results to Slack, email, or custom release bots. This lets you gate deployments based on performance thresholds without manual intervention.

How does LoadTester handle test failures and regressions?

You define threshold rules before launching a test, such as maximum p95 latency or maximum error rate. If a threshold is breached during the run, LoadTester automatically stops the test to prevent damage. For regression detection, the tool compares each run against a saved baseline and alerts your team if performance degrades beyond a configurable percentage.

LoadTester offers a free plan that gives you immediate access to core features including distributed load tests, live analytics, and basic thresholds. For teams that need higher concurrency limits, longer test durations, scheduled baselines, advanced integrations, and priority support, paid plans are available. Visit the LoadTester website to view specific pricing tiers and limits.