Best API Mocking Tools in 2026
Updated
In short: Microcks is ranked #1 of 27 as of 4 October 2026, ahead of Mockzilla and MockServer. The best-ranked option with a free plan is Mockzilla. The lowest first paid tier on this page is Knockout API at $0.02/mo.
When you need to develop against APIs without relying on live responses, mocking tools provide simulated behavior to work with. Compared on supported protocols, request matching, and dynamic responses, the entries offer several angles for assessing mock capabilities. OpenAPI import and mock data generation can matter to your setup, while local deployment, free plans, and paid-from pricing help clarify practical fit. MockServer, Microcks, and WireMock lead the names shown, with another WireMock entry followed by Mockzilla and Mock Service Worker. Consider how you configure mocks and where you want them to run as you compare the listed features.
27 API mocking tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
#1 Microcks Top pick · 7.4 Free plan · Free
#2 Mockzilla Runner-up · 7.4 Free plan · $10/mo
#3 MockServer Also great · 7.1 Free plan · Free
- Free plan apiextensionLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Free plan apiLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
- Paid from
- 10 /mo
- Dynamic responses
- Yes
- OpenAPI import
- Yes
- Mock data generation
- Yes
RecognisedDocumentedFree planPlatforms$10/mofirst paid tier About MockzillaVisit site - Free plan apiLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Free planFree trial apiLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Free plan apiWeb
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms$0.02/mofirst paid tier About Knockout APIVisit site - Free plan apiextensionLinuxself-hostedWeb
- Free plan
- Yes
- Dynamic responses
- Yes
- OpenAPI import
- Yes
- Mock data generation
- Yes
RecognisedDocumentedFree planPlatforms€15/mofirst paid tier About MockflyVisit site - Free plan apiWeb
- Free plan
- Yes
- Paid from
- 29 /mo
- Dynamic responses
- Yes
- OpenAPI import
- Yes
- Mock data generation
- Yes
RecognisedDocumentedFree planPlatforms$29/mofirst paid tier About moqapi.devVisit site - Free planFree trial apiLinuxself-hostedWeb
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Free plan apiWeb
- Free plan
- Yes
- Dynamic responses
- Yes
- OpenAPI import
- Yes
- Mock data generation
- Yes
RecognisedDocumentedFree planPlatforms$2.92/mofirst paid tier About MockAPIVisit site - Free trial AndroidapiiOSLinuxmacOSself-hostedWindows
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Free plan self-hostedWeb
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - LinuxmacOSself-hostedWindows
- Dynamic responses
- Yes
- OpenAPI import
- Yes
- Mock data generation
- Yes
RecognisedDocumentedFree planPlatforms - Linuxself-hostedWindows
- Dynamic responses
- Yes
- OpenAPI import
- Yes
- Mock data generation
- Yes
RecognisedDocumentedFree planPlatforms - Free trial apiLinuxmacOSself-hostedWebWindows
- Free plan
- No
- Paid from
- 10 /mo
RecognisedDocumentedFree planPlatforms$10/mofirst paid tier About HoverflyVisit site - self-hostedWeb
- Free plan
- Yes
- Dynamic responses
- Yes
- OpenAPI import
- Yes
RecognisedDocumentedFree planPlatforms - Free trial apiself-hostedWeb
- Free plan
- No
- Paid from
- 15 /mo
- Dynamic responses
- Yes
- Mock data generation
- Yes
RecognisedDocumentedFree planPlatforms$15/mofirst paid tier About MockiVisit site - Free trial apiLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
- Paid from
- 100 /mo
RecognisedDocumentedFree planPlatforms€10/mofirst paid tier About MockoonVisit site - Web
- Dynamic responses
- Yes
- Mock data generation
- Yes
RecognisedDocumentedFree planPlatforms -
- Dynamic responses
- Yes
- Request matching
- path
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- Yes
- Paid from
- 10 /mo
RecognisedDocumentedFree planPlatforms -
- Dynamic responses
- Yes
- Mock data generation
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Dynamic responses
- Yes
RecognisedDocumentedFree planPlatforms -
- Dynamic responses
- Yes
- Request matching
- path
RecognisedDocumentedFree planPlatforms - self-hosted
- Dynamic responses
- Yes
- OpenAPI import
- Yes
- Request matching
- path
RecognisedDocumentedFree planPlatforms -
- Request matching
- path
RecognisedDocumentedFree planPlatforms
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which API mocking tool is ranked first on Everything Xiaomi?
Microcks is ranked #1 of 27 with a score of 7.4. Mockzilla is second and MockServer third.
How many of these have a free plan?
10 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Knockout API has the lowest first paid tier we found: $0.02/mo.
How is this list ranked?
Ranked on what each maker publishes: documentation depth, a free tier and the platforms it runs on. Paid placements never change a rank.