
Beeceptor
Request inspector
Mockoon
HttpMaster
Webhook.site
Hoppscotch
API Fortress
Easy mocking of any system you integrate with via HTTP or HTTPS.

Postman
Bruno
Insomnia REST
Apidog
Hoppscotch
RapidAPI for Mac
Visual API testing that makes multi-step workflows flow — capture values, chain requests, add assertions, schedule runs, and get alerts.

Which is more popular?
Based on our record, MockServer seems to be more popular. It has been mentioned 4 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | mock-server.com | flowtest.io |
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| Listed in |
What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
Recommended for
No analysis of FlowTest yet.
How often each product is chosen within a category, 0–100% relative to the other.


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


There are several strategies to solve this kind of challenge, but today we will see MockServer as a tool to resolve it. - Source: dev.to / about 2 years ago
The open-source examples are mockoon, mock-server.com, etc. Source: over 3 years ago
I've just found out MockServer and it looks awesome 🤩 so I wanted to check it out repeating the steps of my previous demo WireMock Testing which (as you can expect) uses WireMock, another fantastic tool to mock APIs. - Source: dev.to / over 4 years ago
Tracking FlowTest since Aug 2026.
When comparing MockServer and FlowTest, you can also consider the following products.

Unblock yourself from API dependencies, and build & integrate with APIs fast. Beeceptor helps you build a mock Rest API in a few seconds.
Compare Beeceptor to MockServer or FlowTest:


Debug web hooks, http clients
Compare Request inspector to MockServer or FlowTest:

Bruno is a Git-integrated, fully offline, and open-source API client
Compare Bruno to MockServer or FlowTest:

Mockoon is the easiest and quickest way to design and run mock REST APIs. No remote deployment, no account required, free and open-source.
Compare Mockoon to MockServer or FlowTest:

Design, debug, test, and mock APIs locally, on Git, or cloud. Build better APIs collaboratively for the most popular protocols with a dev‑friendly UI, built-in automation, and an extensible plugin ecosystem.
Compare Insomnia REST to MockServer or FlowTest: