
Beeceptor
WireMock
MockServer
MockAPI
Postman
WireMock Cloud
Requestly
Mockoon is the easiest and quickest way to design and run mock REST APIs. No remote deployment, no account required, free and open-source.
SellerGrowthTools.
SellerSum
eBay Seller Hub
ProfitCalcu
Calcrux
ProfitsCalc.app
EcomCalcTools
Free tools for eBay sellers. Work out the full fee stack on any sale and see what really lands in your bank account.

Which is more popular?
Based on our record, Mockoon seems to be more popular. It has been mentioned 35 times since March 2021.
Website, pricing, platforms and company facts side by side.
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Listmargin
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| Website | mockoon.com | listmargin.com |
| Pricing | — | |
| Platforms | — | |
| Company | Startup from Luxembourg · 1 - 9 employees · 2017 | — |
| Listed in |
What each product offers, as listed by its team.

An editorial look at what each product does well and who it suits.

Overall verdict
Why this product is good
Recommended for
Mockoon is recommended for developers, QA testers, and software teams who require fast and reliable mock APIs for testing or development, as well as those who prefer a lightweight, standalone solution that can be run locally on their machines.
No analysis of Listmargin yet.
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Mockoon and Listmargin. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Email: guillaume[at]1kb.software While bootstrapping http://mockoon.com I'm freelancing to keep the lights on. - Source: Hacker News / over 1 year ago
Mockoon: This open-source desktop application offers a fast setup with a user-friendly interface. It excels at creating customizable responses and supports multiple environments without requiring complex configuration. Mockoon is... - Source: dev.to / over 1 year ago
Mocking: Help your front-end team discover integration or design issues Early in the API development process by mocking your API endpoints. You can either due this directly from your gateway, or use a service like Mockoon. - Source: dev.to / over 1 year ago
Tracking Listmargin since Jul 2026.
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WireMock - a web service test double for all occasions.
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Free fee & profit calculators for eBay, Etsy, PayPal, Stripe, Square and resale marketplaces — updated whenever fees change
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Easy mocking of any system you integrate with via HTTP or HTTPS.
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Seller Hub gives you an easy way to build and run your eBay business.
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