Dev tools · alternatives · 2026
24 alternatives to Atmo
Server Side Api Mocking made easy with UI
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Atmo launched in 2016; newer entries below may have overtaken it.
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API_TESTER▲249Test your APIs right from the macOS menu bar
2025 · apps.apple.com · its alternatives →
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Java HTTP Client in OOP style. Contribute to Vatavuk/verano-http development by creating an account on GitHub.
2019 · github.com · its alternatives →
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Atomus▲68A utility library for testing client-side code in Node.js
2014 · github.com · its alternatives →
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Fake server, Consumer Driven Contracts and help with testing performance from one configuration file with zero system dependencies and no coding whatsoever - quii/mockingjay-server
2015 · github.com · its alternatives →
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Assertible▲50The easiest way to test and monitor your APIs
2016 · assertible.com · its alternatives →
- 12AF
2021 · mockachino.com · its alternatives →
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Mockoon is the easiest and quickest way to run mock REST API servers. No remote deployment, no account required, free, open source and cross-platform.
2017 · mockoon.com · its alternatives →
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Hi HN, I built the first version of Mocktail years ago. I recently came back to the project, and after a pretty substantial rebuild, v4 is now out. Mocktail is a free and open-source, self-hosted mock API server with a built-in dashboard and database, packaged as a single ~25 MB binary. You can run it locally or on your own infrastructure — no account or hosted service required. You can define endpoints and responses, generate realistic data per request, customize headers, status codes and latency, and inspect incoming requests in real time. With v4, I also added MCP support, so coding…
Aug 2026 · getmocktail.com · its alternatives →
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MockAnAPI▲21Your gateway to seamless API mocking and robust development
2023 · angkajuditogelresmi.com · its alternatives →
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Hi HN! I'm Ankit, the founder of Beeceptor, a request mocking and intercepting tool. This time, I built something new to address a pain I’ve personally felt (and heard from dozens of QA, frontend, and platform teams): making OpenAPI specs actually useful during development. API contracts just sit around as docs often. What if you could 'activate' them, instantly have a realistic, hosted mock server-with contract validation, smart test data, and early usage? So I made _Mockaroo for OpenAPI_, but with brains. It spins up a hosted mock server from your spec in one click. It: - Generates…
2025 · beeceptor.com · its alternatives →
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Lightweight and scalable server for mocking http requests
2022 · github.com · its alternatives →
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Hi HN, I built this after using Requestly, Mokku, Mockiato, Tweak, and Mockoon. Each one either paywalled the features I actually needed, required a separate server running on my machine, or just didn't fit the way I work. The browser is already open. DevTools is already open. I wanted the mocking to live there too, not in a separate app I have to remember to start. So roughly a month ago, I started building my own tools. It intercepts network requests at the browser level and lets you swap the response, status code, headers, body without touching your code or spinning up anything.…
Feb 2026 · mockstudio.app · its alternatives →
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2021 · httpiper.com · its alternatives →
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2014 · jsonator.herokuapp.com · its alternatives →
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Create mock APIs in seconds with AI. Ship prototypes faster.
Dec 2025 · mocknica.dev · 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 →