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Tags / Testing /

Mocking

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

The 114repositories with this Tag gained +5,354 net stars in the last 30 days, 11% more than the 30 days before.

0 created in the last 90 days · 24 published a release in the last 30 days · 557K stars in total

All in the Repository Index On Trending

Net stars each day, last 30 days+3,037 last 7 days

Oct 6, 2026Nov 4, 2026

Most net stars, last 30 days

floci-io/floci

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

+3,211

60% 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.

4.7×

+926 net stars, against +197 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 66% of the net stars of this Tag in the last 13 weeks.

floci-io/floci, week to Aug 12: +1,528 net starskeploy/keploy, week to Aug 12: +41 net starsgoogle/googletest, week to Aug 12: +28 net starsaxllent/mailpit, week to Aug 12: +52 net starsfaiscadev/fakecloud, week to Aug 12: +9 net starsAll other repositories, week to Aug 12: +190 net starsfloci-io/floci, week to Aug 19: +823 net starskeploy/keploy, week to Aug 19: +47 net starsgoogle/googletest, week to Aug 19: +29 net starsaxllent/mailpit, week to Aug 19: +63 net starsfaiscadev/fakecloud, week to Aug 19: +6 net starsAll other repositories, week to Aug 19: +214 net starsfloci-io/floci, week to Aug 26: +1,827 net starskeploy/keploy, week to Aug 26: +47 net starsgoogle/googletest, week to Aug 26: +35 net starsaxllent/mailpit, week to Aug 26: +51 net starsfaiscadev/fakecloud, week to Aug 26: +11 net starsAll other repositories, week to Aug 26: +217 net starsfloci-io/floci, week to Sep 2: +650 net starskeploy/keploy, week to Sep 2: +41 net starsgoogle/googletest, week to Sep 2: +514 net starsaxllent/mailpit, week to Sep 2: +58 net starsfaiscadev/fakecloud, week to Sep 2: +5 net starsAll other repositories, week to Sep 2: +224 net starsfloci-io/floci, week to Sep 9: +819 net starskeploy/keploy, week to Sep 9: +42 net starsgoogle/googletest, week to Sep 9: +46 net starsaxllent/mailpit, week to Sep 9: +79 net starsfaiscadev/fakecloud, week to Sep 9: +5 net starsAll other repositories, week to Sep 9: +229 net starsfloci-io/floci, week to Sep 16: +542 net starskeploy/keploy, week to Sep 16: +39 net starsgoogle/googletest, week to Sep 16: +49 net starsaxllent/mailpit, week to Sep 16: +42 net starsfaiscadev/fakecloud, week to Sep 16: +7 net starsAll other repositories, week to Sep 16: +194 net starsfloci-io/floci, week to Sep 23: +1,036 net starskeploy/keploy, week to Sep 23: +33 net starsgoogle/googletest, week to Sep 23: +38 net starsaxllent/mailpit, week to Sep 23: +57 net starsfaiscadev/fakecloud, week to Sep 23: +6 net starsAll other repositories, week to Sep 23: +210 net starsfloci-io/floci, week to Sep 30: +752 net starskeploy/keploy, week to Sep 30: +64 net starsgoogle/googletest, week to Sep 30: +34 net starsaxllent/mailpit, week to Sep 30: +71 net starsfaiscadev/fakecloud, week to Sep 30: +171 net starsAll other repositories, week to Sep 30: +180 net starsfloci-io/floci, week to Oct 7: +421 net starskeploy/keploy, week to Oct 7: +54 net starsgoogle/googletest, week to Oct 7: +40 net starsaxllent/mailpit, week to Oct 7: +70 net starsfaiscadev/fakecloud, week to Oct 7: +17 net starsAll other repositories, week to Oct 7: +195 net starsfloci-io/floci, week to Oct 14: +272 net starskeploy/keploy, week to Oct 14: +61 net starsgoogle/googletest, week to Oct 14: +33 net starsaxllent/mailpit, week to Oct 14: +94 net starsfaiscadev/fakecloud, week to Oct 14: +11 net starsAll other repositories, week to Oct 14: +255 net starsfloci-io/floci, week to Oct 21: +201 net starskeploy/keploy, week to Oct 21: +124 net starsgoogle/googletest, week to Oct 21: +33 net starsaxllent/mailpit, week to Oct 21: +62 net starsfaiscadev/fakecloud, week to Oct 21: +9 net starsAll other repositories, week to Oct 21: +170 net starsfloci-io/floci, week to Oct 28: +252 net starskeploy/keploy, week to Oct 28: +202 net starsgoogle/googletest, week to Oct 28: +28 net starsaxllent/mailpit, week to Oct 28: +70 net starsfaiscadev/fakecloud, week to Oct 28: +13 net starsAll other repositories, week to Oct 28: +163 net starsfloci-io/floci, week to Nov 4: +2,344 net starskeploy/keploy, week to Nov 4: +525 net starsgoogle/googletest, week to Nov 4: +30 net starsaxllent/mailpit, week to Nov 4: +59 net starsfaiscadev/fakecloud, week to Nov 4: +5 net starsAll other repositories, week to Nov 4: +74 net stars

Compare growth

17 of 114 repositories: Created more than 2 years ago, with a push in the last 7 days and a GitHub release in the last 30 days. Select a column name to change the order.

#RepositoryStarsGained, 7 daysPace
1keploy/keploy

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

19K+5252.6×
2nock/nock

HTTP server mocking and expectations library for Node.js

13K-2–
3axllent/mailpit

An email and SMTP testing tool with API for developers

11K+590.8×
4karatelabs/karate

Test Automation Made Simple

9K+4–
5getmoto/moto

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

8.7K+6–
6mockoon/mockoon

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

8.5K+5–
7wiremock/wiremock

A tool for mocking HTTP services

7.4K+5–
8vektra/mockery

A mock code autogenerator for Go

7.2K+5–
9vcr/vcr

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

6.1K+3–
10ardatan/graphql-tools

:wrench: Utility library for GraphQL to build, stitch and mock GraphQL schemas in the SDL-first approach

5.4K+1–
11mock-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+2–
12kevin1024/vcrpy

Automatically mock your HTTP interactions to simplify and speed up testing

3K0–
13SpectoLabs/hoverfly

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

2.5K+1–
14microcks/microcks

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

2.1K+6–
15godot-gdunit-labs/gdUnit4

Embedded unit testing framework for Godot 4 supporting GDScript and C#. Features test-driven development, embedded test inspector, extensive assertions, mocking, scene testing.

1.3K+6–
16pact-foundation/pact-jvm

JVM version of Pact. Enables consumer driven contract testing, providing a mock service and DSL for the consumer project, and interaction playback and verification for the service provider project.

1.1K0–
17mindflayer/python-mocket

a socket mock framework - for all kinds of socket animals, web-clients included

3130–

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/keploy4.7× · +926

Slower than the 30 days before

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

  1. faiscadev/fakecloud0.2× · +44

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 yesterday
  2. nock/nock13K · release 15 days ago
  3. axllent/mailpit11K · release 5 days ago
  4. karatelabs/karate9K · release 13 days ago
  5. getmoto/moto8.7K · release 8 days ago
All 17 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 52 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. 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 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.