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Head-to-head · Software Testing Tools

Grafana k6 vs Postman

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Grafana k6 #6 in Software Testing Tools 8.8/10 Free plan · 14-day trial Free planFree trial✓ 1 of 4 features Visit Grafana k6
Postman #7 in Software Testing Tools 8.7/10 Free plan Free plan✓ 0 of 4 features Visit Postman

Grafana k6 leads on 0 checks, Postman on 1, and 2 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreGrafana k6 · 8.8/10
  • Lowest starting pricePostman · $9/mo
  • Free planboth
  • Free trialonly Grafana k6
  • Most featuresGrafana k6 · 1 of 4

Grafana k6 scores higher on our rubric for software testing tools: 8.8 against 8.7 out of 10; our editors rank them #6 and #7.

Postman is cheaper to start at $9/user/mo against $19/user/mo.

Grafana k6 is the better fit for teams building scriptable load tests. Postman is the better fit for teams testing APIs across multiple protocols.

  • Grafana k6 fits best

    Teams building scriptable load tests

  • Postman fits best

    Teams testing APIs across multiple protocols

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Grafana k6 8.8/10 Visit ↗ Postman 8.7/10 Visit ↗
At a glance
Editor score 8.8 8.7
Ranking #6 in Software Testing Tools #7 in Software Testing Tools
Best for Teams building scriptable load tests Teams testing APIs across multiple protocols
Pricing model Free plan + paid Free plan + paid
Starting price $19/mo $9/mo (best)
Free plan ✓ ✓
Free trial 14 days —
Deployment Cloud, Self-hosted Cloud, Desktop, Browser extension
Platforms Web, Windows, macOS, Linux Web, Windows, macOS, Linux, Chrome extension
Support Email, Community, Docs Tickets, Community, Docs
Integrations 6 integrations 8 integrations
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Grafana k6 1/4 · Postman 0/4
API testing ✓ (best) Not checked yet
Performance testing Not checked yet Not checked yet
Mobile testing Not checked yet Not checked yet
Test management Not checked yet Not checked yet
Specs
Deployment model Hybrid Not checked yet
Parallel runs Not checked yet Not checked yet
Our review
Pros
  • Write tests in JavaScript or TypeScript for HTTP, APIs, and browsers.
  • Run stress, smoke, soak, and breakpoint workloads locally or across Kubernetes.
  • Automate CI/CD checks with thresholds and SLO-based pass/fail criteria.
  • Tests HTTP, GraphQL, SOAP, gRPC, WebSocket, and MQTT APIs
  • Combines scripts, scheduled runs, mocks, and CI/CD execution
  • Workspaces, documentation, and integrations support team workflows
Cons
  • The Pro plan adds usage-based virtual user hour charges to its monthly fee.
  • Free plan support is community-based.
  • Enterprise deployment flexibility and premium support are reserved for Enterprise.
  • Team plan starts at $19 per user per month with annual billing
  • Advanced access controls and governance are reserved for Enterprise
  • Its broad API workflow may exceed the needs of teams seeking a narrow test runner
Our verdict

Grafana k6 is an open-source load and performance testing tool for developers, SREs, and QA teams. It uses JavaScript or TypeScript scripts to model HTTP and API workloads, and also supports browser-based testing with k6 browser. Teams can…

Read the review →

Postman brings API requests, testing, documentation, and collaboration into a shared workspace. Its client supports HTTP, GraphQL, SOAP, gRPC, WebSocket, and MQTT, while collections, environments, variables, and request history help…

Read the review →
  1. Grafana k6Software Testing Tools 8.8Free plan · 14-day trial
  2. PostmanSoftware Testing Tools 8.7Free plan

Strengths and trade-offs

  • Grafana k6 — where it wins

    • Write tests in JavaScript or TypeScript for HTTP, APIs, and browsers.
    • Run stress, smoke, soak, and breakpoint workloads locally or across Kubernetes.
    • Automate CI/CD checks with thresholds and SLO-based pass/fail criteria.

    Where it doesn't

    • The Pro plan adds usage-based virtual user hour charges to its monthly fee.
    • Free plan support is community-based.
    • Enterprise deployment flexibility and premium support are reserved for Enterprise.

  • Postman — where it wins

    • Tests HTTP, GraphQL, SOAP, gRPC, WebSocket, and MQTT APIs
    • Combines scripts, scheduled runs, mocks, and CI/CD execution
    • Workspaces, documentation, and integrations support team workflows

    Where it doesn't

    • Team plan starts at $19 per user per month with annual billing
    • Advanced access controls and governance are reserved for Enterprise
    • Its broad API workflow may exceed the needs of teams seeking a narrow test runner

More comparisons

All software testing tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update