Best Smokex Alternatives & Competitors in 2025

A Powerful API Mocking and Testing Tool

Open Source freemium

A simple, beautiful Webhook debugging tool.

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Try for free Open Source freemium

View and respond to requests on an HTTP endpoint

HTTP request and response service

Open Source

RequestBin.com gives you a URL that collects requests you send to it so you can inspect them in a...

Operational insights for your Open Source applications

The easiest way to run remote user research. Test your product with users worldwide & create experiences they'll love.

The simplest way of scheduling HTTP requests.

freemium

The Collaboration Platform for API Development

Open Source

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Try for free Open Source freemium

Piwik PRO is a marketing suite dedicated to enterprise clients.

Instantly generate a free, unique URL and email address to test, inspect, and automate (with a visual workflow editor and scripts) incoming HTTP requests and emails.

Open Source freemium $14.0 / Monthly

Online API Mocking Tool: API simulation, Mock API, API stubbing, fake API or fake web services, API for tests, forward server callbacks or webhook notifications to the localhost, proxy requests, requests restrictions, response templating etc.

freemium $2.99 / Monthly (10 projects,2000 requests/day,custom subdomain)