Best API Mocking Tools in 2026
Updated
In short: WireMock is ranked #1 of 25 as of 4 October 2026, ahead of MockServer and Microcks. The best-ranked option with a free plan is MockServer. The lowest first paid tier on this page is Knockout API at $0.02/mo.
Mocking tools let developers work with simulated API behavior while building or checking integrations. Compare supported protocols and request matching, then consider dynamic responses, OpenAPI import and mock data generation. Local deployment may shape how you prefer to work; free-plan availability and paid-from pricing add cost context. Parasoft SOAtest, Knockout API and Microcks are among the entries to examine. The listed criteria can help you compare how each option supports configuring mocks and fitting them into your development workflow.
25 API mocking tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Recognised 40% · Phone app 26% · Documented 20% · Free plan 14% of the score
- 1 WireMock No phone app RecognisedPhone appDocumentedFree plan 8.0Free
- 2 MockServer No phone app RecognisedPhone appDocumentedFree plan 7.9Free
- 3 Microcks No phone app RecognisedPhone appDocumentedFree plan 7.9Free
- 4 WireMock No phone app RecognisedPhone appDocumentedFree plan 7.8Free
- 5 Mockzilla No phone app RecognisedPhone appDocumentedFree plan 7.3$10/mo Dynamic responses: YesOpenAPI import: Yes
- 6 Mockfly No phone app RecognisedPhone appDocumentedFree plan 7.2€15/mo Dynamic responses: YesOpenAPI import: Yes
- 7 Mockoon No phone app RecognisedPhone appDocumentedFree plan 7.1€10/mo
- 8 Mock Service Worker No phone app RecognisedPhone appDocumentedFree plan 7.1 Dynamic responses: YesOpenAPI import: Yes
- 9 moqapi.dev No phone app RecognisedPhone appDocumentedFree plan 7.1$29/mo Dynamic responses: YesOpenAPI import: Yes
- 10 Beeceptor No phone app RecognisedPhone appDocumentedFree plan 7.0
- 11 MockAPI No phone app RecognisedPhone appDocumentedFree plan 7.0$2.92/mo Dynamic responses: YesOpenAPI import: Yes
- 12 Imposter No phone app RecognisedPhone appDocumentedFree plan 6.8 Dynamic responses: YesOpenAPI import: Yes
- 13 Hoverfly No phone app RecognisedPhone appDocumentedFree plan 6.7$10/mo
- 14 json-server No phone app RecognisedPhone appDocumentedFree plan 6.4Free Dynamic responses: Yes
- 15 OpenAPI Mock No phone app RecognisedPhone appDocumentedFree plan 6.2 Dynamic responses: YesOpenAPI import: Yes
- 16 OpenAPI Server No phone app RecognisedPhone appDocumentedFree plan 6.1 Dynamic responses: YesOpenAPI import: YesRequest matching: path
- 17 Knockout API No phone app RecognisedPhone appDocumentedFree plan 6.1$0.02/mo
- 18 Stoplight Prism No phone app RecognisedPhone appDocumentedFree plan 6.0
- 19 Mocki No phone app RecognisedPhone appDocumentedFree plan 5.8$15/mo Dynamic responses: Yes
- 20 Mockttp No phone app RecognisedPhone appDocumentedFree plan 5.7Free Dynamic responses: Yes
- 21 Mirage JS No phone app RecognisedPhone appDocumentedFree plan 5.5 Dynamic responses: Yes
- 22 API-Mocked No phone app RecognisedPhone appDocumentedFree plan 5.5 Dynamic responses: YesRequest matching: path
- 23 MockWebServer No phone app RecognisedPhone appDocumentedFree plan 5.0Free Dynamic responses: YesRequest matching: path
- 24 Pretender.js No phone app RecognisedPhone appDocumentedFree plan 4.9 Dynamic responses: Yes
- 25 MockPilot No phone app RecognisedPhone appDocumentedFree plan 4.9 Request matching: path
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 Samsung Mobile US Press?
WireMock is ranked #1 of 25 with a score of 8.0. MockServer is second and Microcks third.
How many of these have a free plan?
12 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 mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.