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Tags / Testing /

Mocking

Library or server that creates mocks, stubs, fakes, or mock HTTP APIs for tests.

The 62repositories with this Tag gained +4,337 net stars in the last 30 days, 6% less than the 30 days before.

0 created in the last 90 days · 18 published a release in the last 30 days · 521K stars in total

All in the Repository Index On Trending

Net stars each day, last 30 days+2,194 last 7 days

Oct 5, 2026Nov 3, 2026

  • Seed Dataset
  • Rising Admissions

Most net stars, last 30 days

floci-io/floci

Light, fluffy, and always free - The AWS Local Emulator alternative

+2,440

56% of the net stars of this Tag

Largest Pace, last 30 days

keploy/keploy

Open-source platform for creating safe, isolated production sandboxes for API, integration, and E2E testing.

4.2×

+806 net stars, against +193 in the 30 days before

Most stars, created in the last 90 days

No other repository with this Tag was created in the last 90 days.

Where the stars went, last 13 weeks

Net stars gained each week. The repositories that gained the most have their own color.

floci-io/floci gained 67% of the net stars of this Tag in the last 13 weeks.

floci-io/floci, week to Aug 11: +1,387 net starskeploy/keploy, week to Aug 11: +48 net starsgoogle/googletest, week to Aug 11: +33 net starsaxllent/mailpit, week to Aug 11: +64 net starsmswjs/msw, week to Aug 11: +34 net starsAll other repositories, week to Aug 11: +156 net starsfloci-io/floci, week to Aug 18: +897 net starskeploy/keploy, week to Aug 18: +42 net starsgoogle/googletest, week to Aug 18: +27 net starsaxllent/mailpit, week to Aug 18: +63 net starsmswjs/msw, week to Aug 18: +12 net starsAll other repositories, week to Aug 18: +164 net starsfloci-io/floci, week to Aug 25: +1,774 net starskeploy/keploy, week to Aug 25: +47 net starsgoogle/googletest, week to Aug 25: +36 net starsaxllent/mailpit, week to Aug 25: +53 net starsmswjs/msw, week to Aug 25: +18 net starsAll other repositories, week to Aug 25: +170 net starsfloci-io/floci, week to Sep 1: +743 net starskeploy/keploy, week to Sep 1: +50 net starsgoogle/googletest, week to Sep 1: +487 net starsaxllent/mailpit, week to Sep 1: +47 net starsmswjs/msw, week to Sep 1: +17 net starsAll other repositories, week to Sep 1: +182 net starsfloci-io/floci, week to Sep 8: +770 net starskeploy/keploy, week to Sep 8: +39 net starsgoogle/googletest, week to Sep 8: +74 net starsaxllent/mailpit, week to Sep 8: +79 net starsmswjs/msw, week to Sep 8: +21 net starsAll other repositories, week to Sep 8: +181 net starsfloci-io/floci, week to Sep 15: +571 net starskeploy/keploy, week to Sep 15: +37 net starsgoogle/googletest, week to Sep 15: +48 net starsaxllent/mailpit, week to Sep 15: +46 net starsmswjs/msw, week to Sep 15: +10 net starsAll other repositories, week to Sep 15: +173 net starsfloci-io/floci, week to Sep 22: +930 net starskeploy/keploy, week to Sep 22: +37 net starsgoogle/googletest, week to Sep 22: +42 net starsaxllent/mailpit, week to Sep 22: +54 net starsmswjs/msw, week to Sep 22: +17 net starsAll other repositories, week to Sep 22: +163 net starsfloci-io/floci, week to Sep 29: +881 net starskeploy/keploy, week to Sep 29: +55 net starsgoogle/googletest, week to Sep 29: +30 net starsaxllent/mailpit, week to Sep 29: +78 net starsmswjs/msw, week to Sep 29: +22 net starsAll other repositories, week to Sep 29: +148 net starsfloci-io/floci, week to Oct 6: +427 net starskeploy/keploy, week to Oct 6: +59 net starsgoogle/googletest, week to Oct 6: +41 net starsaxllent/mailpit, week to Oct 6: +69 net starsmswjs/msw, week to Oct 6: +35 net starsAll other repositories, week to Oct 6: +131 net starsfloci-io/floci, week to Oct 13: +286 net starskeploy/keploy, week to Oct 13: +56 net starsgoogle/googletest, week to Oct 13: +30 net starsaxllent/mailpit, week to Oct 13: +82 net starsmswjs/msw, week to Oct 13: +27 net starsAll other repositories, week to Oct 13: +194 net starsfloci-io/floci, week to Oct 20: +205 net starskeploy/keploy, week to Oct 20: +113 net starsgoogle/googletest, week to Oct 20: +38 net starsaxllent/mailpit, week to Oct 20: +73 net starsmswjs/msw, week to Oct 20: +18 net starsAll other repositories, week to Oct 20: +152 net starsfloci-io/floci, week to Oct 27: +232 net starskeploy/keploy, week to Oct 27: +141 net starsgoogle/googletest, week to Oct 27: +24 net starsaxllent/mailpit, week to Oct 27: +67 net starsmswjs/msw, week to Oct 27: +15 net starsAll other repositories, week to Oct 27: +132 net starsfloci-io/floci, week to Nov 3: +1,558 net starskeploy/keploy, week to Nov 3: +483 net starsgoogle/googletest, week to Nov 3: +30 net starsaxllent/mailpit, week to Nov 3: +52 net starsmswjs/msw, week to Nov 3: +15 net starsAll other repositories, week to Nov 3: +57 net stars

Compare growth

62 repositories with this Tag. Select a column name to change the order.

#RepositoryStarsGained, 7 daysPace
1floci-io/floci

Light, fluffy, and always free - The AWS Local Emulator alternative

29K+1,5586.7×
2keploy/keploy

Open-source platform for creating safe, isolated production sandboxes for API, integration, and E2E testing.

19K+4833.4×
3axllent/mailpit

An email and SMTP testing tool with API for developers

11K+520.8×
4google/googletest

GoogleTest - Google Testing and Mocking Framework

40K+301.3×
5mswjs/msw

The industry standard for API mocking in JavaScript.

18K+15–
6pester/Pester

Pester is the ubiquitous test and mock framework for PowerShell.

3.4K+8–
7getmoto/moto

A library that allows you to easily mock out tests based on AWS infrastructure.

8.7K+7–
8wiremock/wiremock

A tool for mocking HTTP services

7.4K+7–
9stretchr/testify

A toolkit with common assertions and mocks that plays nicely with the standard library

26K+6–
10mockoon/mockoon

Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.

8.5K+6–
11vektra/mockery

A mock code autogenerator for Go

7.2K+6–
12stoplightio/prism

Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.

5.1K+6–
13microcks/microcks

The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀

2.1K+5–
14karatelabs/karate

Test Automation Made Simple

9K+4–
15mock-server/mockserver-monorepo

MockServer is an HTTP(S) mock server and proxy for testing that lets you mock APIs, inspect and modify live traffic, and inject failures. It supports HTTP/1.1, HTTP/2, gRPC, WebSockets, TCP and more on a single port, with additional support for HTTP/3, message brokers, and AI/LLM APIs.

5K+4–
16mailhog/MailHog

Web and API based SMTP testing

16K+3–
17SpectoLabs/hoverfly

Lightweight service virtualization/ API simulation / API mocking tool for developers and testers

2.5K+3–
18Netflix/pollyjs

Record, Replay, and Stub HTTP Interactions.

10K+2–
19devlooped/moq

The most popular and friendly mocking framework for .NET

6.4K+2–
20vcr/vcr

Record your test suite's HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests.

6.1K+2–

Faster than the 30 days before

Net stars of the last 30 days are 2 or more times those of the 30 days before.

  1. keploy/keploy4.2× · +806

Slower than the 30 days before

Net stars of the last 30 days are 50% or less of those of the 30 days before.

No repository with this Tag meets this rule now.

New in the last 90 days

Created on GitHub in the last 90 days.

No repository with this Tag meets this rule now.

Older than 2 years, still releasing

Created more than 2 years ago, with a push in the last 7 days and a GitHub release in the last 30 days.

  1. keploy/keploy19K · release today
  2. nock/nock13K · release 14 days ago
  3. axllent/mailpit11K · release 4 days ago
  4. karatelabs/karate9K · release 13 days ago
  5. getmoto/moto8.7K · release 7 days ago
All 14 in the table

Last release more than 180 days ago

The newest GitHub release is more than 180 days old. A repository that never published a release is not in this list.

  1. typicode/json-server76K · release 7 months ago
  2. YMFE/yapi28K · release 5 years ago
  3. nuysoft/Mock20K · release 10 years ago
  4. mailhog/MailHog16K · release 6 years ago
  5. sinonjs/sinon9.8K · release 8 years ago
All 23 in the table

Top GitHub topics with this Tag

Primary languages

How a repository gets this Tag

An agent reads the description, the GitHub topics, and the start of the README of each repository. It chooses Tags only from the Tag list in the AwesomeRepos source code. For each Tag, it quotes the text. A code check keeps the Tag only when the quote is in that text. The page of each repository shows the quote of each of its Tags. A Tag does not rank repositories. It does not say that one repository can replace another. To report a wrong Tag, use "Report a problem with this page" on the page of the repository.

How the numbers are counted

All numbers come from the Star History of the repositories that have the Tag now. A period is a run of complete UTC days. All numbers on this page count only the repositories that AwesomeRepos shows in lists. A machine computes them each hour.

For each repository, a period counts only when Star History has each of its days, or when the repository was created in the period. Otherwise the table shows "–". The bars of a week with no complete data are grey.

The Pace is the net stars of a period divided by the net stars of the period before. It shows only when Star History covers each day of the period before, with at least 3 net stars a day on average.

The chart at the top adds up the net stars of all the repositories with the Tag. The darker area is the part from the Seed Dataset; the rest is from rising Admissions. A rising Admission comes into the Repository Index because it gained stars quickly. Its Star History before its Admission comes from the Repository Host. Thus the days before many rising Admissions are higher than they were for the repositories in the index at that time. The repositories of the Seed Dataset are a set that does not change.

The releases are the GitHub releases of each repository. The lists and the table do not rank repositories, and they do not say that one repository can replace another.