k6

What k6 does

k6 is a developer-centric load and performance testing platform delivered through two primary offerings: k6 Open Source, a free, AGPLv3-licensed tool written in Go with a Goja-based JavaScript execution engine for test scripting, and Grafana Cloud k6, a managed SaaS for distributed performance testing at up to 1 million concurrent virtual users across 21 geographic load zones. The platform supports protocol-level testing (HTTP, GraphQL, WebSocket, gRPC) and browser-level testing via a Playwright-inspired API, with an extensible xk6 architecture enabling community and Grafana-maintained extensions for Kubernetes, Kafka, Prometheus, OpenTelemetry, AWS services, and chaos/fault injection (xk6-disruptor). The k6 open-source project was created by loadimpact in 2016 and acquired by Grafana Labs in 2021, integrating the tool into Grafana's broader observability stack alongside Synthetic Monitoring and Application Observability.

The product targets backend and frontend developers, site reliability engineers, and software engineers in test/QA, who use k6 to validate scalability, prevent regressions, and shift performance testing left into CI/CD pipelines. Revenue is generated through tiered, usage-based subscriptions: a free tier of 500 virtual-user hours per month, a self-serve Pro tier starting at $0.15 per VU-hour with a $19/month platform fee, and an Enterprise tier that can drop to $0.05 per VU-hour subject to a $25,000/year minimum and supports deployment across Public Cloud, Federal Cloud, and Bring Your Own Cloud with FedRAMP, NIST 800-53, SOC 2 Type II, PCI DSS, and GDPR compliance. Distribution combines a product-led growth funnel (GitHub, comprehensive documentation, free tier, IDE plugins) with community-led developer adoption and direct enterprise sales for larger committed deployments.

The customer base is reported at more than 6,000 companies and includes Amazon, Microsoft, GitLab, Carvana, Sephora, Citrix, Yum Brands, NOAA, Just Eat Takeaway, and DHL Express. The broader go-to-market is reinforced by an integration footprint spanning Postman (collection-to-script converter), Datadog and New Relic (real-time results output), Kubernetes (k6-operator), Prometheus (remote write), Slack (threshold alerting), and CI/CD pipelines, with Grafana k6 Studio (general availability 2025) extending the tool into visual, recorder-driven test creation. k6 is headquartered in Stockholm, Sweden, while Grafana Labs, the parent company, is headquartered in New York.

Name

k6

Legal name

Grafana Labs

Website

https://k6.io

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

11–50 employees

Short description

k6 is an open-source and SaaS load and performance testing platform, built on a Go engine with JavaScript scripting, that targets developers, SREs, and QA engineers validating system reliability and scalability through CI/CD-integrated test workflows.

Ownership category

akta.pro rank

Product category

Load and Performance Testing Software

NAICS

Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (5182), Custom Computer Programming Services (541511), Computer Systems Design and Related Services (5415)

SIC

Services-Prepackaged Software (7372), Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

App Testing, QA & Beta Distribution Platforms (BPAMADAK)

Keywords

• Load testing software
• Performance testing platform
• Synthetic monitoring
• Chaos engineering tools
• Developer testing automation

Headquarters

HQ city

Stockholm

HQ country

Sweden

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

Technology or R&D, Personnel, Infrastructure, Operations, Marketing or Sales

Revenue model

1. Grafana Cloud k6 SaaS Subscription: Cloud-hosted load testing platform with managed infrastructure, storage, visualization, collaborative features, and enterprise security. Tiered pricing based on virtual user hours consumed with platform fees.
2. Enterprise Contracts: Annual committed contracts for large enterprises requiring premium support, deployment flexibility (Public Cloud, Federal Cloud, BYOC), and scale up to 1 million concurrent virtual users. Minimum $25,000/year commitment.
3. Open Source (Free): k6 Open Source is freely available under AGPLv3 license. Serves as a lead generator for Grafana Cloud k6 adoption.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

k6 is a developer-centric load and performance testing platform. Its core offering consists of k6 Open Source (free, Go-based CLI tool with JavaScript scripting) and Grafana Cloud k6 (managed SaaS that scales to 1 million concurrent virtual users across 21 geographic load zones). The platform supports HTTP, GraphQL, WebSocket, and gRPC protocol testing, browser-level testing via a Playwright-inspired API, synthetic monitoring, and fault injection testing for Kubernetes environments.

Product overview

k6 is a developer-centric load testing platform consisting of two primary products: k6 Open Source (a free, open-source load testing tool written in Go with JavaScript scripting) and Grafana Cloud k6 (a SaaS platform for managed, scalable performance testing). The ecosystem includes supporting tools like Grafana k6 Studio for visual test creation, xk6-disruptor for fault injection testing, postman-to-k6 converter for importing Postman collections, and jslib.k6.io providing reusable JavaScript libraries. The platform targets developers, SREs, and QA engineers, supporting API testing, browser testing, WebSocket, gRPC, and synthetic monitoring with integrations into Grafana, Kubernetes, and CI/CD pipelines.

Differentiator

Problem solved

Functional benefit

Brands

• xk6-disruptor: An extension for k6 that enables fault injection testing in Kubernetes environments by disrupting services and pods to test resilience patterns.
• k6 Studio

Products and services

• k6 Open Source Free, open-source load and performance testing CLI tool built in Go with a JavaScript scripting API. Supports HTTP, GraphQL, WebSocket, gRPC, and browser testing. Runs locally, in Docker, or distributed in Kubernetes for developers, SREs, and QA engineers.
• Grafana Cloud k6 Cloud-hosted, managed performance testing SaaS platform offering scalable cloud load tests (up to 1 million concurrent virtual users or 5 million requests/second), collaborative workspaces, automated Cloud Insights performance analysis, 21 geographic load zones, private load zones, and enterprise-grade security (FedRAMP, SOC 2, PCI DSS). Targeted at engineering teams and large enterprises.
• Grafana k6 Studio Desktop application for visually creating performance tests, including a browser-based Recorder to capture user flows, a Generator that produces k6 test scripts, and a Validator for debugging scripts before execution in Grafana Cloud k6. For developers and QA engineers who prefer visual test creation.
• xk6-disruptor Fault injection extension for k6 that enables chaos engineering and resilience testing by injecting faults (HTTP errors, network delays, gRPC faults, pod terminations) into Kubernetes applications to test fallback logic and system tolerance using the same k6 JavaScript API. For SREs and platform engineers.
• postman-to-k6 Open-source converter tool that transforms Postman collections into k6 test scripts, enabling existing API functional testing workflows to be reused for load testing. For API developers and QA teams using Postman.
• jslib.k6.io Repository of JavaScript utility libraries for k6 scripts, including k6-utils, httpx, k6chaijs, AWS SDK wrappers, papaparse, jsonpath, and other helper modules. For k6 script authors needing reusable utilities.
• Grafana Cloud Synthetic Monitoring Add-on monitoring service in Grafana Cloud that reuses k6 test scripts to continuously verify production environments, enabling synthetic testing with pass/fail criteria, alerting, and scheduled checks. For SREs and operations teams needing production uptime assurance.

Quantifiable outcome

• Scale to 1 million concurrent virtual users or 5 million requests/second
• +3 more outcomes

Named customers10 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration16 records

Feature8 records

Partnerships

Three partnerships are on record, tiered core.

• Grafana LabscoreTechnology or IntegrationGrafana Labs acquired k6 and maintains it as both open source and Grafana Cloud k6. k6 is fully integrated into the Grafana Cloud observability platform, sharing dashboards, alerts, and unified experience with other Grafana Cloud products like Synthetic Monitoring and Application Observability.
• PostmancoreTechnology or IntegrationOfficial integration via postman-to-k6 converter tool. Converts Postman collections to k6 scripts for load testing. Enables Postman users to transition from API functional testing to load testing.
• KubernetescoreTechnology or Integrationk6-operator enables distributed k6 testing on Kubernetes. XK6-disruptor extension for fault injection testing in Kubernetes environments.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Apache JMeter: The most established open-source load and performance testing tool. JMeter competes head-to-head with k6 OSS for developer mindshare, particularly in Java-centric enterprises.
• Gatling: Open-source load testing tool with a code-as-script model (Scala/JavaScript/Kotlin) and a commercial cloud offering. Direct competitor to k6 in developer-led performance testing, with strong enterprise traction.
• Locust: Python-based open-source load testing framework often adopted by engineering teams. Competes with k6 OSS on the developer-experience axis, particularly for Python-centric organizations.
• BlazeMeter: Cloud-based continuous testing platform (Perforce) that runs JMeter, Gatling, and other scripts at scale. Direct competitor to Grafana Cloud k6 in the managed load testing category.
• NeoLoad (Tricentis): Enterprise-grade load and performance testing platform from Tricentis. Competes with k6 for large enterprise deals, particularly in regulated industries requiring protocol-rich testing.

Broad incumbents

• Micro Focus LoadRunner (OpenText): Legacy enterprise performance testing suite now under OpenText. Represents the traditional, license-heavy incumbent that developer-led tools like k6 displace in greenfield accounts.
• Datadog: Major observability platform with built-in synthetic and load testing capabilities. An integration partner today, but also a bundling competitor as customers consolidate testing under one observability vendor.

Emerging players

• Artillery: Modern, code-first load testing tool with an open-source core and managed cloud. Closely comparable in developer experience philosophy to k6, and a frequent head-to-head in PLG evaluations.
• Speedscale: Kubernetes-native API load testing and traffic replay tool. Comparable to k6 for cloud-native workloads, with overlap on xk6-disruptor's fault injection and synthetic monitoring use cases.
• Postman: API development and testing platform whose collections k6 converts into load tests via postman-to-k6. An adjacent tooling peer and on-ramp, increasingly adding its own performance testing features.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/k6_io
• GitHubgithub.com/grafana
• YouTubeyoutube.com/channel/UCYCwgQAMm9sTJv0rgwQLCxw
• LinkedInlinkedin.com/company/k6io

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about k6