Dev tools · alternatives · 2026

24 alternatives to GraphQL Zero – AIs Mocking APIs

I made an API mocking tool that imports a schema, populates fake data, then runs a local server. This is helpful for testing APIs or advanced prototyping. A demo video is here: https://www.loom.com/share/abad2cdf325e4e0b9addea1e14406166?... There’s two fun things about this tool 1. the complete lack of configs and schema annotations. i.e. you don’t need to learn faker-js. You just need your existing GraphQL schema and to to swap out the server URL in your frontend code. 2. the depth. Your fake objects have relationships to other fake objects. And in proxy mode, real…

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. GraphQL Zero – AIs Mocking APIs launched in 2023; newer entries below may have overtaken it.

1. 1
   Mockaroo▲354

   A realistic data generator to test your app

   2015 · mockaroo.com · its alternatives →

2. 2
   HTTP Mock – Intercept, debug and mock HTTP(S) with zero setup▲341

   Beautiful, cross-platform & open-source tools for debugging, testing and building with HTTP(S), on Windows, Linux & Mac.

   2019 · httptoolkit.tech · its alternatives →

3. 3
   Mock API Generator▲555

   Generate custom data & API to build apps in less than 30s

   2021 · retool.com · its alternatives →

4. 4
   GraphQL Faker – Mock or extend your GraphQL API with faked data▲7

   🎲 Mock or extend your GraphQL API with faked data. No coding required. - APIs-guru/graphql-faker

   2017 · github.com · its alternatives →

5. 5
   Mockend▲6

   Effortless hosted fake REST and GraphQL API for teams/makers

   2023 · mockend.com · its alternatives →

6. 6
   GraphQL Faker▲7

   Mock or extend existing GraphQL API with faked data.

   2017 · github.com · its alternatives →

7. 7
   Mockoon – mock REST APIs in seconds▲68

   Mockoon is the easiest and quickest way to run mock REST API servers. No remote deployment, no account required, free, open source and cross-platform.

   2017 · mockoon.com · its alternatives →

8. 8
   Pollux▲82

   Fake json data & json server mock API generator with JWT

   2021 · mohammedal-rowad.github.io · its alternatives →

9. 9
   GraphQL Playground▲195

   GraphQL IDE for better development workflows

   2017 · github.com · its alternatives →

10. 10
    GraphQL Inspector▲107

    Bulletproof your GraphQL API

    2019 · the-guild.dev · its alternatives →

11. 11
    The all-in-one fake API▲12

    The All in one Fake API - Dummy data for your projects, fast and simple. Users, products, posts, comments and more

    2024 · fooapi.com · its alternatives →

12. 12
    APIEval-20▲121

    An open benchmark for AI agents that test APIs

    May 2026 · resources.kusho.ai · its alternatives →

13. 13
    Akto's Test Editor▲143

    Your playground for writing custom API security tests

    2023 · akto.io · its alternatives →

14. 14
    Mocktail – Free, open-source mock API server with a built-in dashboard▲25

    Hi HN, I built the first version of Mocktail years ago. I recently came back to the project, and after a pretty substantial rebuild, v4 is now out. Mocktail is a free and open-source, self-hosted mock API server with a built-in dashboard and database, packaged as a single ~25 MB binary. You can run it locally or on your own infrastructure — no account or hosted service required. You can define endpoints and responses, generate realistic data per request, customize headers, status codes and latency, and inspect incoming requests in real time. With v4, I also added MCP support, so coding…

    Aug 2026 · getmocktail.com · its alternatives →

15. 15
    Fake API for Devs▲8

    Free mock api generator for developers | instant test data

    Nov 2025 · fakeapifordevs.vercel.app · its alternatives →

16. 16
    MockThis▲80

    Generate mock data using AI

    2023 · its alternatives →

17. 17
    Mocklets▲82

    A HTTP-based API simulator to assist parallel development 🛠️

    2018 · mocklets.com · its alternatives →

18. 18
    GraphQL Fake▲8

    Generate fake data fast

    2017 · 159.203.96.223 · its alternatives →

19. 19
    Mockingjay – Fake servers and consumer-driven contracts▲39

    Fake server, Consumer Driven Contracts and help with testing performance from one configuration file with zero system dependencies and no coding whatsoever - quii/mockingjay-server

    2015 · github.com · its alternatives →

20. 20
    Testing REST, GraphQL APIs▲14

    :boom: Test REST, GraphQL APIs. Contribute to kiranz/just-api development by creating an account on GitHub.

    2018 · github.com · its alternatives →

21. 21
    FakeURL▲6

    Free online api mocking tool | mock api generator

    2025 · fakeurl.dev · its alternatives →

22. 22MS
    Mocktastic – Simple, Offline mock REST APIs for your entire team▲43

    2018 · mocktastic.com · its alternatives →

23. 23
    Declarative Testing Framework for REST, GraphQL APIs▲45

    :boom: Test REST, GraphQL APIs. Contribute to kiranz/just-api development by creating an account on GitHub.

    2018 · github.com · its alternatives →

24. 24
    Mock Studio▲3

    Hi HN, I built this after using Requestly, Mokku, Mockiato, Tweak, and Mockoon. Each one either paywalled the features I actually needed, required a separate server running on my machine, or just didn't fit the way I work. The browser is already open. DevTools is already open. I wanted the mocking to live there too, not in a separate app I have to remember to start. So roughly a month ago, I started building my own tools. It intercepts network requests at the browser level and lets you swap the response, status code, headers, body without touching your code or spinning up anything.…

    Feb 2026 · mockstudio.app · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →