Dev tools · alternatives · 2026

24 alternatives to Apicat – A Lightweight Offline Postman Alternative

Apicat is the ultimate offline Postman alternative that stores your .http files locally. It’s Git-friendly, open-source, and highly compatible with Postman. Test APIs offline with this powerful free offline API client designed for developers who need a reliable local API testing tool.

Apicat is an offline API testing tool designed for developers as an alternative to Postman. It stores API requests in .http files locally, works with Git version control, and maintains compatibility with Postman… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1. 1
   Restfox – Open source lightweight alternative to Postman▲758

   Last time I posted this it didn't garner much interest. There have been lots of improvements and fixes since the last release. Quick list of features: - Workspaces - Tabs - Nested Folders - Lots of context menus - Response history - Plugins - Runs fully in the browser and runs offline if necessary - Chrome and Firefox extension to bypass CORS restrictions - Desktop builds for all platforms - GraphQL support - Import collections exported from Postman and Insomnia - Simple user friendly interface I built this because I love Insomnia but wanted a portable version that I could run in the…

   2022 · restfox.dev · its alternatives →

2. 2
   Apidog▲570

   Development teams often struggle with using multiple tools like Postman and Swagger for API design, development, and testing. This fragmented approach leads to outdated API specs and chaotic collaboration. So we built Apidog: a single, unified API platform for team collaboration. It has a beautiful interface that makes it easy to create API spec, generate request data from API spec, validate responses, create mock data, orchestrate test scenarios, and publish API documentation. Apidog = Postman + Swagger + Mock + JMeter.

   2024 · apidog.com · its alternatives →

3. 3
   Postman▲182

   Postman is a powerful HTTP client to test REST API

   2014 · postman.com · its alternatives →

4. 4
   Postcat▲16

   A powerful open source, cross-platform API development tool.

   2024 · github.com · its alternatives →

5. 5
   Postman for Mac (Beta)▲372

   Build, test, and document your APIs faster

   2016 · postman.com · its alternatives →

6. 6
   Bruno ▲457

   Bruno is the Git-native API client for REST, GraphQL, gRPC and Websocket. A local and open-source solution to Postman. Fast, developer-first, and no cloud syncing.

   2025 · usebruno.com · its alternatives →

7. 7
   Apidog Fast Request▲512

   Develop APIs fast + automatically detect endpoints

   2025 · fastrequest.apidog.com · its alternatives →

8. 8
   API Explorer▲7

   Test, document, and optimize apis effortlessly

   2025 · apiexplorer.vercel.app · its alternatives →

9. 9
   APIsList▲293

   The updated list of the public APIs

   2022 · apislist.com · its alternatives →

10. 10
    ApiHome▲73

    Home of API testing

    2022 · apihome.io · its alternatives →

11. 11IC
    I created Postwoman, an online, open-source API request builder▲280

    Postwoman 👽 - API request builder https://liyasthomas.github.io/postwoman Feel free to contribute on GitHub 💚 https://github.com/liyasthomas/postwoman...

    2019 · indiehackers.com · its alternatives →

12. 12
    Library of API collections for Postman▲77

    Accelerate API development with Postman's all-in-one platform. Streamline collaboration and simplify the API lifecycle for faster, better results. Learn more.

    2017 · postmancollections.com · its alternatives →

13. 13
    New way to test APIs with OpenAPI and Postman▲80

    Port OpenAPI Specs to Postman Collections, inject test suite and run via Newman 👨🏽‍🚀 - apideck-libraries/portman

    2021 · github.com · its alternatives →

14. 14
    Testnizer — The offline API client▲3

    Offline, open-source API client. Your data never leaves.

    Jul 2026 · testnizer.com · its alternatives →

15. 15
    Yaak – An open source, Git-friendly desktop API client▲153

    Hi HN! I'm Greg and I've been working on Yaak for just over a year. I usually describe it as a Postman alternative since most developers are familiar with that, but it's targeted more toward users that just want an API client (no mocking, testing, spec design, etc). Having also created Insomnia for a similar purpose, I never thought I'd build another API client again. But, after selling Insomnia in 2019 and watching it expand into the broader feature set of Postman, I was left wanting a simpler tool again. Yaak was my answer to that. It's hard to describe how it's better than the 100 other…

    2025 · yaak.app · its alternatives →

16. 16
    Posting v1 – The modern HTTP client that lives in your terminal▲184

    Hi HN! I just released version 1.0 of Posting, an open source terminal application I've been working on which you might find useful if you work with, test, or develop HTTP APIs! Posting (https://github.com/darrenburns/posting) is an HTTP client, not unlike Postman and Insomnia. However, as a TUI application, it works over SSH and enables efficient keyboard-centric workflows. Your requests are stored locally in simple readable YAML files, meaning they're easy to read and version control. Some other features include: - "Jump mode" navigation - Environments/variables…

    2024 · github.com · its alternatives →

17. 17
    Voiden API Client▲143

    Hey HN! Aldin here, a helping hand to Voiden (https://voiden.md) Voiden is a free, offline, Git-native API client. Your API definitions, docs, and tests all live together. It came out of years of frustration: cloud sync lock-in, paywalled basics, bloated UIs, and lag on even simple requests. So the team built the opposite: an offline tool with no login, no telemetry, no lock-in. Just markdown and hotkeys. It behaves like code: local files, git branches, no cloud nonsense. Terminal is built-in, so you can commit, diff, and push changes right from the app. Docs stay close to your…

    2025 · voiden.md · its alternatives →

18. 18MS
    Mocktastic – Simple, Offline mock REST APIs for your entire team▲43

    2018 · mocktastic.com · its alternatives →

19. 19
    Fetchbook – Run and test your HTTP requests 100% locally▲59

    Run and test your HTTP requests. Git friendly, 100% local. - 4lejandrito/fetchbook

    2023 · github.com · its alternatives →

20. 20
    Run in Postman Button▲106

    Test public APIs with one click

    2016 · postman.com · its alternatives →

21. 21
    Apify SDK – A scalable web crawling and scraping library for JavaScript▲78

    Crawlee—A web scraping and browser automation library for Node.js to build reliable crawlers. In JavaScript and TypeScript. Extract data for AI, LLMs, RAG, or GPTs. Download HTML, PDF, JPG, PNG, and other files from websites. Works with Puppeteer, Playwright, Cheerio, JSDOM, and raw HTTP. Both headf

    2018 · github.com · its alternatives →

22. 22
    API Peek▲1

    postman alternative, API Testing tool, API Platform, apipeek

    May 2026 · apipeek.app · its alternatives →

23. 23
    GetMan▲6

    Api testing dashboard

    2025 · get-man.vercel.app · its alternatives →

24. 24
    Graphweaver – Instant GraphQL API on Postgres, MySQL, SQLite and More▲74

    Graphweaver is an open-source GraphQL API Server that can connect many data sources to create a single API. Create a headless CMS, API Gateway, BaaS or use it as a BFF.

    2023 · github.com · 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 →