Performance Testing Tool
k6 Load Testing Agency
Performance issues cost you users and revenue. We use k6 to simulate real-world traffic, find your breaking points, and give you the data to fix them, before your users find them for you.
Types of k6 tests we run
Each test type answers a different question about how your system behaves under pressure.
Load test
Sustained traffic at your expected production volume. Confirms your system handles normal peak load within SLA thresholds.
Stress test
Traffic ramped beyond expected peak to find where performance degrades and your system breaks. Essential before high-traffic events.
Spike test
Sudden jump from low to very high traffic. Simulates a product launch, viral moment, or flash sale. Tests auto-scaling and queue behaviour.
Soak test
Sustained load over several hours. Detects memory leaks, connection pool exhaustion, and gradual degradation that short tests miss.
Smoke test
Minimal load on every CI run. Catches performance regressions before they reach staging or production.
API benchmark
Endpoint-level throughput and latency testing. Identifies slow queries, N+1 problems, and inefficient service calls.
What we deliver
- k6 scripts in JavaScript, version-controlled in your repo
- CI/CD integration (GitHub Actions, GitLab CI, Azure DevOps)
- Grafana Cloud dashboard for live result visualisation
- p50, p90, p95, p99 response time analysis
- Bottleneck identification: database, API, CDN, or application layer
- Spike and soak scenarios for pre-launch confidence
- Core Web Vitals via k6 browser module or Lighthouse
- Written performance report with remediation recommendations
- Retest after fix to confirm improvement
When to run a load test
Before a product launch
Simulate launch-day traffic to find breaking points before real users hit them.
Before a peak season
Retailers, ticketing platforms, and event companies run soak and spike tests before anticipated surges.
After a major refactor
Architecture changes, database migrations, or service splits can introduce regressions. Verify with a load test.
After slow-page complaints
If users are reporting slowness, a k6 benchmark pinpoints whether it is infrastructure, application, or query-level.
Frequently Asked Questions
- k6 is a modern, developer-friendly load testing tool from Grafana Labs. Scripts are written in JavaScript, run as Go binaries for high performance, and integrate natively with CI/CD pipelines. Unlike JMeter (XML-based, GUI-heavy) or Gatling (Scala DSL), k6 is designed for engineers: version-controlled scripts, clean CLI output, and direct integration with Grafana dashboards. It can simulate thousands of virtual users without heavy infrastructure.
- We run load tests (sustained traffic at target volume), stress tests (traffic beyond expected peak to find breaking points), spike tests (sudden traffic surges, e.g. a product launch or sale event), soak tests (sustained load over hours to detect memory leaks), and smoke tests (low-volume baseline checks in CI). Each test type answers a different question about your system.
- We baseline your system first, then compare results against agreed thresholds (e.g. p95 response time under 500ms, error rate under 1%). We deliver a written report including: response time distributions (p50, p90, p95, p99), throughput, error rates and root cause analysis, bottleneck identification, and specific remediation recommendations. Results can be streamed to Grafana Cloud for live visibility.
- Yes. k6 is primarily an API and protocol-level tool, which makes it excellent for REST and GraphQL API load testing. It can also test WebSocket connections and gRPC endpoints. For browser-level performance (Core Web Vitals), we use the k6 browser module or Lighthouse.
- We integrate k6 into GitHub Actions, GitLab CI, or Azure DevOps. Tests run as part of your pipeline on a schedule or pre-release, with thresholds that fail the build if performance degrades. Results can be exported to Grafana Cloud, InfluxDB, or as JUnit XML for your CI dashboard.
What is k6 and what makes it different from other load testing tools?
What types of performance tests do you run with k6?
How do you interpret k6 results and what do you report?
Can k6 test APIs as well as web pages?
How do you run k6 tests in CI/CD?
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