Best API Mocking Software

Adam Crivello
AC
Researched and written by Adam Crivello

Application programming interface (API) mocking software simulates the behavior of APIs during software development and testing. These platforms enable developers, QA engineers, and other technical teams to create and deploy mock APIs that mimic the functionality of real APIs without needing a live backend or third-party service.

These products allow teams to define custom API endpoints, set up response scenarios, and simulate various network conditions. By creating virtual API environments, developers can work independently of backend services, test edge cases, and validate client-side code without relying on production systems.

API mocking software typically supports multiple API protocols, such as representational state transfer (REST), Graph query language (GraphQL), and simple object access protocol (SOAP). It can generate realistic mock data based on API specifications like OpenAPI or custom schemas.

API mocking is closely related to service virtualization software, though service virtualization encompasses entire services or systems beyond strictly APIs.

To qualify for inclusion in the API Mocking category, a product must:

Provide a platform for creating and managing mock APIs
Support multiple API protocols, like REST, GraphQL, SOAP
Allow users to define custom API endpoints and response scenarios
Offer the ability to simulate various network conditions and error states
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Best API Mocking Software At A Glance

Leader:
Apidog
Apidog
Easiest to Use:
Apidog
Apidog
Top Trending:
Mockoon
Mockoon
Best Free Software:
Apidog
Apidog
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Top Trending:
Mockoon
Mockoon
Best Free Software:
Apidog
Apidog

G2 takes pride in showing unbiased reviews on user satisfaction in our ratings and reports. We do not allow paid placements in any of our ratings, rankings, or reports. Learn about our scoring methodologies.

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21 Listings in API Mocking Available
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Apidog
(206)4.9 out of 5
Entry Level Price:Free
1st Easiest To Use in API Mocking software
OverviewPros and Cons
Product Description

Apidog Inc. is a US development platform company founded in 2022. The company operates internationally, serving clients ranging from small teams to enterprise-level organizations with flexible pricing

Users: Software Engineer, Senior Software Engineer · Industries: Computer Software, Information Technology and Services · Market Segment: 44% Small-Business, 32% Mid-Market
Pros and ConsSeller Details
ProsEase of Use, API Management, Features, API Integration, User Interface
ConsAPI Limitations, Learning Curve, Learning Difficulty, Poor UI, Limited Customization
Seller Details
Seller
Apidog
Company Website
Year Founded
2023
HQ Location
Middletown, US
LinkedIn® Page
www.linkedin.com
4 employees on LinkedIn®
Beeceptor
(73)4.8 out of 5
Entry Level Price:Free
OverviewPros and Cons
Product Description

Beeceptor is a mock server and service virtualization platform that helps QA teams simulate APIs, increase coverate, remove backend dependencies and shift left, and test integrations earlier in the de

Users: Software Developer · Industries: Computer Software, Information Technology and Services · Market Segment: 52% Small-Business, 25% Mid-Market
Pros and ConsSeller Details
ProsEase of Use, Speed, Easy Setup, API Testing, Integrations
ConsMissing Features, Request Limitations, Limited Features, UX Improvement, Bug Issues
Seller Details
Seller
Beeceptor
Year Founded
2017
HQ Location
Hyderabad, Telangana
Twitter
@beeceptor
173 Twitter followers
LinkedIn® Page
www.linkedin.com
7 employees on LinkedIn®
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WireMock Cloud
(10)5.0 out of 5
OverviewPros and Cons
Product Description

WireMock Cloud is AI-native API simulation platform for simulating APIs and services with speed and precision. It enables teams to accelerate development and testing through robust, stateful API simul

Market Segment: 50% Mid-Market, 30% Enterprise
Pros and ConsSeller Details
ProsEase of Use, Customer Support, API Testing, Integrations, Tools
ConsAPI Limitations, Expensive, Limited Community Support
Seller Details
Seller
WireMock
HQ Location
Menlo Park, California
LinkedIn® Page
www.linkedin.com
13 employees on LinkedIn®
Mockaroo
(12)4.2 out of 5
OverviewPros and Cons
Product Description

Mockaroo is a data generator and API mocking tool helps in creating custom CSV, JSON, SQL, and Excel datasets to test and demo software.

Market Segment: 42% Small-Business, 33% Mid-Market
Pros and ConsSeller Details
ProsEase of Use, User Interface, Easy Setup, Speed, API Testing
ConsData Limitations, Limited Features, Limited Functionality, Data Security, Poor Customer Support
Seller Details
Seller
Mockaroo
Year Founded
2003
HQ Location
San Francisco, CA
LinkedIn® Page
www.linkedin.com
1 employees on LinkedIn®
Mockoon
(17)4.5 out of 5
Entry Level Price:$15.00
OverviewPros and Cons
Product Description

Mockoon is a powerful, open-source platform designed to streamline API mocking processes. It offers a comprehensive suite of tools tailored to meet the needs of developers, QA engineers, and teams wor

Industries: Computer Software · Market Segment: 41% Small-Business, 35% Enterprise
Pros and ConsSeller Details
ProsFree Usage, Open Source, Deployment, Ease of Use
ConsLearning Curve, Poor Documentation
Seller Details
Seller
Mockoon
Year Founded
2017
HQ Location
Luxembourg
LinkedIn® Page
www.linkedin.com
2 employees on LinkedIn®
Mockfly
(6)5.0 out of 5
Entry Level Price:Free
OverviewPros and Cons
Product Description

Mockfly is a cloud-based platform designed to help developers create, manage, and simulate mock APIs for development and testing purposes. It offers a range of features that set it apart from other mo

Market Segment: 83% Small-Business, 17% Mid-Market
Pros and ConsSeller Details
ProsEase of Use, Features, User Interface, API Management, Collaboration
ConsAPI Management, Complex Interface, Data Inaccuracy, Data Limitations
Seller Details
Seller
Mockfly
HQ Location
N/A
Twitter
@getmockfly
48 Twitter followers
LinkedIn® Page
www.linkedin.com
1 employees on LinkedIn®
Mock API
(4)4.5 out of 5
Entry Level Price:Free
OverviewPros and Cons
Product Description

Mock API is an affordable online API mocking server that allows developers to generate a mocked API in less than 30 seconds and it supports a free forever plan for individuals

Market Segment: 50% Mid-Market, 25% Enterprise
Pros and ConsSeller Details
ProsEase of Use, Features, Testing, API Integration, Automation
ConsComplex Implementation, Poor Customer Support, Time Consumption
Seller Details
Seller
Prime Dev
HQ Location
N/A
LinkedIn® Page
www.linkedin.com
1 employees on LinkedIn®
Mockable.io
(3)4.2 out of 5
OverviewPros and Cons
Product Description

Mockable is a simple configurable service to mock out RESTful API or SOAP web-services.

Market Segment: 67% Small-Business, 33% Enterprise
Pros and ConsSeller Details
ProsEase of Use, API Testing, API Management, Automation, Easy Integrations
Seller Details
Seller
mockable.io
HQ Location
N/A
LinkedIn® Page
www.linkedin.com
1 employees on LinkedIn®
MockLab
(3)4.7 out of 5
OverviewPros and Cons
Product Description

MockLab is an API simulator that helps software teams test faster and better.

Market Segment: 67% Mid-Market, 33% Small-Business
Pros and ConsSeller Details
ProsAPI Management, Speed
ConsTesting Issues
Seller Details
Seller
MockLab
Year Founded
2017
HQ Location
Menlo Park, California, United States
Twitter
@mocklab
1 Twitter followers
LinkedIn® Page
www.linkedin.com
13 employees on LinkedIn®
Mocky.io
(2)4.0 out of 5
OverviewSeller Details
Product Description

The world easiest & fastest tool belts to mock your APIs|

Market Segment: 50% Mid-Market, 50% Small-Business
Seller Details
Seller
Mocky.io
HQ Location
N/A
LinkedIn® Page
www.linkedin.com
1 employees on LinkedIn®
Mocklets
(1)4.0 out of 5
OverviewPros and Cons
Product Description

Meet Mocklets, a HTTP-based mock API simulator, which helps simulate APIs for faster parallel development and more comprehensive testing.

Market Segment: 100% Mid-Market, 100% Small-Business
Pros and ConsSeller Details
ProsEase of Use, Flexibility, Helpful, User Interface
ConsMissing Features, Slow Performance
Seller Details
Seller
Mocklets
Year Founded
2019
HQ Location
Bangalore, IN
Twitter
@mocklets
40 Twitter followers
LinkedIn® Page
www.linkedin.com
2 employees on LinkedIn®
Mocko — Mocks made easy, simulate your REST API for free
(1)3.5 out of 5
OverviewPros and Cons
Product Description

Proxy your API, choose which endpoints to mock in the cloud and inspect traffic, for free. Speed up your development and integrations tests.

Market Segment: 100% Enterprise
Pros and ConsSeller Details
ProsEase of Implementation, Ease of Use
ConsPoor UI
Seller Details
Seller
Mocko
HQ Location
N/A
LinkedIn® Page
www.linkedin.com
1 employees on LinkedIn®
Requestly
(5)4.7 out of 5
Entry Level Price:Free
OverviewPros and Cons
Product Description

Requestly is a modern and powerful companion for API Development and Testing. It is an open-source tool purpose-built to speed up and simplify API development workflow for developers and QAs. It is a

Market Segment: 40% Small-Business, 40% Mid-Market
Pros and ConsSeller Details
ProsTime-saving, Cross-Browser Testing, Easy Implementation, Implementation Ease, Setup Ease
ConsComplexity, Difficult Setup, Learning Curve
Seller Details
Seller
Requestly
Year Founded
2021
HQ Location
San Francisco, US
Twitter
@requestlyio
1,568 Twitter followers
LinkedIn® Page
www.linkedin.com
11 employees on LinkedIn®
AutoStub 2.0
0 ratings
OverviewSeller Details
Product Description

AutoStub™ is an essential tool to fasten API development. It can significantly reduce your build time by quickly designing, prototyping, documenting and testing the APIs. AutoStub creates a functiona

Seller Details
Seller
Torry Harris Business Solutions
Year Founded
1998
HQ Location
Perth Amboy, US
Twitter
@torryharris
1,779 Twitter followers
LinkedIn® Page
www.linkedin.com
2,177 employees on LinkedIn®
MockAPI
0 ratings
OverviewSeller Details
Product Description

MockAPI lets users mock up APIs, generate custom data, and perform operations on it using RESTful interface.

Seller Details
Seller
Mockapi
HQ Location
N/A
LinkedIn® Page
www.linkedin.com
1 employees on LinkedIn®
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