Clobbr

// Clobbr vs JMeter

A lightweight JMeter alternative for developers

JMeter is a capable enterprise-grade load tester with two decades of features. It's also a JVM app with a Test Plan tree, Samplers, Listeners, and a learning curve that's overkill if you're a developer who just wants to load test your own HTTP API. Clobbr is built for that developer.

Download the Clobbr api speed test app on the App StoreDownload the Clobbr api speed test app on the Microsoft StoreGet Clobbr api speed test CLI from npmView or download Clobbr api speed test on Github

Why JMeter feels heavy for simple tasks

JMeter is aimed at dedicated performance-testing teams. That shows up in every part of the experience:

  • It's a JVM app. First-run means installing a modern Java runtime, downloading the distribution, and running scripts from a bin directory.
  • The model is generic. A Test Plan is a tree: Thread Groups, Samplers, Listeners, Controllers, Assertions. The payoff is flexibility across protocols (HTTP, JDBC, FTP, JMS, SOAP). The cost is ceremony for a single HTTP endpoint.
  • Reporting is a separate step. Run the test, capture listener output, then run the HTML report generator on top of the results file.
  • It assumes non-GUI for load. The docs are clear that the GUI is for authoring, not for actually driving load. That's fine for dedicated perf teams, less fine for an afternoon exploration.

Clobbr takes the opposite trade-off: HTTP-only, form-based, GUI is the point. You lose the flexibility across non-HTTP protocols; you gain time-to-first-test measured in seconds.

Feature-by-feature: Clobbr vs JMeter

Side-by-side on the axes that matter for a developer picking a load testing tool for their own API.

Clobbr vs JMeter feature comparison
FeatureClobbrJMeter
RuntimeNative desktop app (macOS & Windows) + Node CLIJVM (requires a modern Java runtime)
Install footprint<100 MB desktop app / single npm installSeveral hundred MB including JRE + plugins
Time to first testUnder a minute10–30 minutes (install JRE, set up Test Plan, Thread Group, HTTP sampler, listeners)
Configuration modelForm-based: URL, verb, headers, payload, iterationsTree-based Test Plan with Thread Groups, Samplers, Listeners, Controllers
Learning curveMinutesHours–days for the happy path; more for advanced scenarios
GraphQL supportAuto-detected, stats split per operationManual. POST with a JSON body like any other call.
Result historyBuilt-in, browsable across runsVia listeners + HTML report generator (separate step)
CLI / headlessFirst-class: @clobbr/cli on npmYes, via jmeter -n non-GUI mode; GUI is discouraged for load
PricingLifetime license (free CLI, Included on Setapp)Open source (free)
Best-fit teamDevelopers testing their own APIsDedicated QA / performance teams, enterprise loads

When JMeter is still better

We said it in the intro and we'll say it again, louder: there are real reasons to pick JMeter. Don't switch to Clobbr if:

  • You're testing protocols beyond HTTP (FTP, JDBC, JMS, SOAP, TCP-level behavior).
  • You need coordinated distributed load from multiple machines (JMeter master/worker mode).
  • Your team has a big library of existing Test Plans, custom Samplers, or plugins.
  • Your organization has a performance-testing group and this is their standardized tool.

For everyone else (API developers load testing their own endpoints), JMeter is the equivalent of bringing a forklift to carry a single box. Clobbr is the hand truck.

// FAQ

Frequently asked questions

Is Clobbr trying to replace JMeter?
For the common developer use case of 'I want to know how my API holds up under load', yes. For enterprise performance-testing teams running distributed load from multiple machines with complex scenario logic, JMeter is still the more capable tool. Clobbr and JMeter aren't aimed at the same team.
Why does JMeter feel so heavy?
JMeter started as a Java GUI application for functional and performance testing across multiple protocols: HTTP, FTP, JDBC, SOAP, JMS, and more. That generality is its strength and its cost. You're setting up a Test Plan with Thread Groups and Samplers before you've fired a single request. For a developer who just wants to hit an HTTP endpoint 500 times, that setup is disproportionate.
Do I need to install Java to use Clobbr?
No. The desktop app is native macOS / Windows. The CLI is a single npm install. Nothing to do with a JVM.
Can Clobbr do distributed load like JMeter's master-worker mode?
Not today. Clobbr drives load from wherever it's running. For most API load testing that's plenty; a single modern machine can push well past what most endpoints can accept. If you specifically need to drive load from multiple coordinated machines (e.g. to simulate geographic distribution), JMeter's master-worker mode is still the right pick.
How do I translate a JMeter Test Plan to Clobbr?
Usually one HTTP Sampler in JMeter = one Clobbr run. The Thread Group's number of threads maps to Clobbr's concurrency (parallel) setting, and loop count maps to iterations. HTTP Request headers become Clobbr's headers; the request body becomes Clobbr's JSON payload. If your Test Plan is a single Sampler with a Thread Group, the translation is essentially one-to-one.
Can Clobbr run in CI like jmeter -n?
Yes, that's what @clobbr/cli is for. Reference pipelines for GitHub Actions, GitLab CI, and CircleCI live at parsecph/clobbr-ci-examples.
When is JMeter still the better choice?
Pick JMeter when you need (a) protocols beyond HTTP such as FTP, JDBC, JMS, or SOAP; (b) distributed load generation from multiple coordinated machines; (c) a large existing library of JMeter plugins your team already relies on; or (d) your organization has a dedicated performance-testing group that's standardized on it. For HTTP-only load testing driven by an individual developer, Clobbr gets you there much faster.

// Related

Related pages

// Ship it

Try Clobbr

No JVM. No Test Plan tree. No per-sampler listener config. Just enter a URL, headers, and payload, then see how your API holds up.

Download the Clobbr api speed test app on the App StoreDownload the Clobbr api speed test app on the Microsoft StoreGet Clobbr api speed test CLI from npmView or download Clobbr api speed test on Github

Lifetime license · macOS, Windows, CLI · no subscription · available Included on Setapp