Dev tools · alternatives · 2026

24 alternatives to test.io

Online socket.io testing tool

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. test.io launched in 2020; newer entries below may have overtaken it.

1
API Tester▲209
The easiest way to test APIs
2017 · its alternatives →
2
Load-test.io▲99
Website load testing made easy
2021 · its alternatives →
3
HTTP Mock – Intercept, debug and mock HTTP(S) with zero setup▲341
Beautiful, cross-platform & open-source tools for debugging, testing and building with HTTP(S), on Windows, Linux & Mac.
2019 · httptoolkit.tech · its alternatives →
4LI
Log.io (Realtime log monitoring, powered by node.js + socket.io)▲205
Mengutamakan tampilan modern dan kemudahan navigasi, BUSUR4D menghadirkan pengalaman gaming yang terasa lebih sederhana namun tetap menarik. Beragam pilihan permainan dapat dijelajahi dalam satu platform dengan interface responsif dan desain visual yang nyaman, sehingga aktivitas gaming menjadi lebi
2011 · logio.org · its alternatives →
5
UserTest.io▲151
Affordable remote user testing built for rapid user feedback
2017 · its alternatives →
6MN
My new project - ask.io▲206
2013 · ask.io · its alternatives →
7
UserTesters.io▲322
Earn money for testing websites, right from your couch.
2018 · 123b.global · its alternatives →
8
Monitor.io – remote monitoring and debugging for socket.io▲51
2014 · drewblaisdell.github.io · its alternatives →
9SW
Socket Wrench – Insomnia/Postman for Websocket Testing▲23
2019 · asleepysamurai.com · its alternatives →
10
ApiHome▲73
Home of API testing
2022 · apihome.io · its alternatives →
11
req▲71
A lightweight, minimal yet powerful API testing tool
2022 · npmjs.com · its alternatives →
12
AbTest.io▲122
A free url shortener with A/B testing features
2017 · cbsplit.com · its alternatives →
13
Test Cafe▲92
Automated browser testing
2016 · devexpress.github.io · its alternatives →
14
Count.io▲73
A simple counting and A/B testing API.
2017 · count.io · its alternatives →
15
WebsocketD▲82
WebSockets are easy now
2015 · websocketd.com · its alternatives →
16
Websocket Explorer▲14
Test, debug and explore Websocket APIs
2025 · metorial.com · its alternatives →
17
API Flow Integration Tool▲73
Powerful tool for API flow integration, testing, prototyping
2020 · its alternatives →
18
SimpleApiTest▲1
API testing simplified: offline-ready, user-friendly
2023 · simpleapitest.com · its alternatives →
19
HTTP Request Online▲5
HTTP Request Online - Free API Testing Tool
Dec 2025 · httprequest.net · its alternatives →
20
API Test Online▲3
test your api online
2018 · its alternatives →
21
Toolaska▲7
Free online developer tools | json, encoding, code compare
2025 · toolaska.com · its alternatives →
22
DevTool.io▲38
I built devtool.io over a weekend to solve a recurring pain point: discovering and keeping track of high-quality developer tools. I've lost count of how many times I've bookmarked a great CLI, API tester, or AI tool—only to forget where I saw it. DevTool.io is a minimal, searchable directory where developers can find and compare tools by category (CI/CD, Frontend, AI/ML, Databases, etc.), see what's trending, and browse curated picks. Each tool includes metadata like website, GitHub, category, and tags (open-source, freemium, etc.). Feedback, ideas, or tool suggestions are all…
2025 · devtool.io · its alternatives →
23
Boltly▲11
Postman for Socket.io
2016 · its alternatives →
24
IO Tools▲21
Online web tools to support your daily work
2021 · iotools.cloud · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →