ab

slow in single-threaded can be made more efficient by taskset, written in C

ali

Generate HTTP load and plot the results in real-time, written in Go (golang)

apib

most of the features of ApacheBench (ab), also designed as a more modern replacement, written in C

autocannon

fast HTTP/1.1 benchmarking tool written in Node.js

baloo

Expressive end-to-end HTTP API testing made easy, written in Go (golang)

baton

HTTP load testing, written in Go (golang)

Bencher

A suite of continuous benchmarking tools designed to catch performance regressions in CI

bombardier

Fast crossplatform HTTP benchmarking tool, written in Go (golang)

cassowary

is a modern HTTP(S), intuitive & cross-platform load testing tool, written in Go (golang)

cryload

Cross-platform HTTP load testing CLI, ab/wrk alternative with JSON/CSV output for CI/CD, written in Crystal

curl-loader

performance loading of various application services and traffic generation, written in C

ddosify

High-performance load testing tool, written in Go (golang)

drill

Drill is a HTTP load testing application inspired by Ansible syntax, written in Rust

fasthttploader

benchmark (kinda ab) with autoadjustment and charts based on fasthttp library, written in Go (golang)

fbender

A load-testing command line tool for generic network protocols (HTTP, DNS, DHCP, …), written in Go (golang)

fortio

load testing library and command line tool and web UI. Allows to specify a set query-per-second load and record latency histograms and other useful stats, written in Go (golang)

gatling

High performance load testing framework based on Scala, Akka and Netty, written in Scala

go-wrk

a HTTP benchmarking tool based in spirit on the excellent wrk tool (wg/wrk), written in Go (golang)

goad

Goad is an AWS Lambda powered, highly distributed, load testing tool, written in Go (golang)

gobench

HTTP/HTTPS load testing and benchmarking tool, written in Go (golang)

gohttpbench

ab-like benchmark tool run on multi-core cpu, written in Go (golang)

goloris

Slowloris for NGINX DoS attack, written in Go (golang)

goose

A modern, high-performance and flexible distributed HTTP(S) load testing tool, written in Rust

h2load

benchmarking tool for HTTP/2 and HTTP/1.1. It supports SSL/TLS and clear text for all supported protocols, written in C/C++

hey

HTTP(S) load generator, ApacheBench (ab) replacement, formerly known as rakyll/boom, written in Go (golang)

htstress

multithreading high-load bechmarking services (>5K rps), written in C/Linux

httperf

difficult configuration, slow and single threaded, written in C

httping

Ping with HTTP requests, see http://www.vanheusden.com/httping/, written in C

httpit

A rapid http(s) benchmark tool, written in golang

inundator

A simple and high-throughput HTTP flood program, written in C/Linux

jmeter

Apache JMeter™, pure application designed to load test performance both on static and dynamic resources, written in Java

k6

A modern load testing tool scriptable in ES6 JS with support for HTTP/1.1, HTTP/2.0 and WebSocket, written in Go (golang)

locust

easy-to-use, distributed load testing tool with real-time web UI. Simulates a swarm of concurrent users, the behavior of each of them is defined by your python code. Written in Python

lor-axe

A multi-threaded, low-bandwidth HTTP Slowloris DoS tool that handles connections and sockets in parallel, written in Rust

mgun

A modern tool for load testing HTTP servers, written in Go (golang)

molotov

A simple Python 3.7+ tool to write load tests

NBomber

Modern and flexible load testing framework for Pull and Push scenarios, designed to test any system regardless a protocol (HTTP/WebSockets/AMQP etc) or a semantic model (Pull/Push), written in F# (F Sharp)

Netling

Netling is a load tester client for easy web testing., written in C# (C Sharp)

oha

HTTP load generator, inspired by rakyll/hey with tui animation, written in Rust

pewpew

Flexible HTTP command line stress testing tool for websites and web services, written in Go (golang)

plow

A high-performance HTTP benchmarking tool with real-time web UI and terminal displaying, written in Go (golang)

pounce

event-driven with a similar interface as wrk but with the ambition to potentially achieve lower latency and higher throughout, written in C

pywrkr

ab/wrk-inspired benchmarking CLI with latency percentiles, virtual-user simulation, rate limiting, traffic profiles, HAR import, and SLO/threshold checks for CI, written in Python

RapidAPI (Paw)

for Mac is a full-featured HTTP client that lets you test and describe the APIs you build or consume.

rewrk

A more modern http framework benchmarker supporting HTTP/1 and HTTP/2 benchmarks, written in Rust.

reqstress

a benchmarking&stressing tool that can send raw HTTP requests, written in Go (golang).

salvo

A simple HTTP(S) load testing tool like boom, but based on molotov. Python

siege

multithreaded concurrent connections and slow single-user, written in C

slapper

Simple load testing tool with real-time updated histogram of request timings, written in Go (golang)

slow_cooker

A load tester focused on lifecycle issues and long-running tests, service with a predictable load and concurrency level for a long period of time, written in Go (golang)

slowhttptest

Application Layer DoS attack simulator, written in C++

sniper

powerful & high-performance http load tester, written in Go (golang)

thrash

HTTP Micro Benchmarker, written in Go (golang)

tquic_client

A high-performance HTTP/3 benchmarking tool, written in Rust

tsung

Simulate stress users in order to test the scalability and performance of IP based client/server applications HTTP, WebDAV, SOAP, PostgreSQL, MySQL, LDAP and Jabber/XMPP servers, written in Erlang

vegeta

HTTP load testing tool and library, written in Go (golang)

weighttp

multithreaded, but slower than htstress without keepalive, written in C

welle

ab (Apache Benchmark) like tool, written in Rust

wrk

multithreaded, but doesn't offer concurrent connections and a keepalive switch, written in C/Lua

wrk2

constant throughput, correct latency recording variant of wrk, written in C/Lua Concurrent connections are enabled with: -c, --connections Connections to keep open And keepalive (which is default) can be disabled using: -H "Connection: close"

yandex-tank

Load and performance benchmark tool, written in Python/C|C++|Asm (phantom)

zrk

A constant-throughput load generator in Zig ⚡

seq 0 10000 | xargs -P 100 -I {} curl

- Benchmarking in restricted environments, using GNU toolchain

agent-qa

Self-improving QA agent for natural-language web and mobile regression tests, written in TypeScript

bat

Go implement CLI, cURL-like tool for humans, written in Go (golang)

Bruno

is a Fast and Git-Friendly Opensource API client

curl

Powerful features command-line tool for transferring data specified with URL syntax, written in C

Online curl command line builde

curlconverter

convert curl commands to python, javascript, php

hitt

File based HTTP testing tool focused on speed and simplicity, written in Rust

hoppscotch

API request builder

DeepfakeHTTP

is a web server that uses HTTP dumps as a source for responses, written in Java

httpie

client, user-friendly curl replacement with intuitive UI, JSON support, syntax highlighting, wget-like downloads, extensions, written in Python

HTTPie Desktop

HTTPie Desktop is a cross-platform API testing client for humans. Use it to test REST, GraphQL, and HTTP APIs painlessly.

HttpMaster

Professional desktop tool for HTTP testing and debugging.

curlie

If you like the interface of HTTPie but miss the features of curl, curlie is what you are searching for. Curlie is a drop-in replacement for httpie that use curl to perform operations, written in Go (golang)

xh

Yet another HTTPie clone, written in Rust

httpstat

It's like curl -v, with colours

hurl

Hurl is a command line tool that runs HTTP requests defined in a simple plain text format

redirect-checker

HTTP redirect chain analyzer, detect redirect loops, measure performance, multiple User-Agent presets, written in TypeScript (Cloudflare Workers)

insomnia

simple, beautiful, and free Desktop REST API client (Mac, Windows, and Linux)

jaggr

JSON Aggregation CLI, Jaggr can be used to integrate vegeta with jplot, written in Go (golang)

jq

is a lightweight and flexible command-line JSON processor, written in C

Keploy

Open source ai testing platform that records user traffic as test cases and mocks (infrastructure virtualisation along withDBs) and uses AI to expand the API, schema and code coverage of the backend regression test suite. It also auto-generates tests with assertions and is used for contract…

OrcaReplay

Records the HTTP traffic of an AI coding agent and serves the recording back, so the same run re-executes with no model called, written in TypeScript

Parsistent

Free browser-based toolkit: HTTP request tester with proxy & anti-bot detection, CSS selector, XPath, regex, diff, JSON formatter

Voiden

Offline markdown based API client

Proxyman

Capture HTTP(s) in a few clicks. Best-in-class native macOS app to capture, decrypt, and mock your HTTP(s) requests/ responses with powerful debugging tools.

Webhook Debugger, Logger & API Mocking Suite

Enterprise-grade tool for testing, debugging, and logging incoming webhooks in real-time, written in Node.js.

Yaak

API client for modern developers, Call REST, GraphQL, SSE, and gRPC APIs from a simple and intuitive app.

https://github.com/marmelab/awesome-rest

A collaborative list of great resources about RESTful API architecture, development, test, and performance. Feel free to contribute to this ongoing list.

https://github.com/stepci/awesome-api-clients

https://github.com/mrmykey/awesome-http-clients

BlazeMeter

offers a cross-enterprise test automation framework for the entire technical team (developers, devops, ops and QA) throughout the product development lifecycle. Run continuous or 'on demand' testing for APIs, mobile apps and websites. Run from the cloud, on-premise or as a hybrid solution. Use…

NewRelic

software analytics tool suite used by developers, ops, and software companies to understand how your applications are performing in development and production

GetPageSpeed Amplify

Visually identify performance bottlenecks, overloaded servers, or potential DDoS attacks. Improve and optimize NGINX performance with intelligent advice and recommendations. Get alerts when something is wrong with the delivery of your application. Plan capacity and performance for web…

k6.io

Open source load testing tool and SaaS for engineering teams. Powerful scripting and lots of CI/CD integration.

RedLine13

Cloud Based Load Testing to run JMeter, Gatling, or custom code load test plans at scale using low cost instance pricing.

tracetest

Use OpenTelemetry for testing and synthetic monitoring. Write your tests using YAML

https://github.com/aliesbelik/load-testing-toolkit

A collection of open-source tools for debugging, benchmarking, load and stress testing your code or services.