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OpenAPI
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Postman vs OpenAPI: What are the differences?

What is Postman? Only complete API development environment. It is the only complete API development environment, used by nearly five million developers and more than 100,000 companies worldwide.

What is OpenAPI? Allows the owner of a network-accessible service to give universal access. It is a publicly available application programming interface that provides developers with programmatic access to a proprietary software application or web service.

Postman and OpenAPI belong to "API Tools" category of the tech stack.

OpenAPI is an open source tool with 15.4K GitHub stars and 5.46K GitHub forks. Here's a link to OpenAPI's open source repository on GitHub.

According to the StackShare community, Postman has a broader approval, being mentioned in 2497 company stacks & 12250 developers stacks; compared to OpenAPI, which is listed in 3 company stacks and 4 developer stacks.

- No public GitHub repository available -

What is OpenAPI?

It is a publicly available application programming interface that provides developers with programmatic access to a proprietary software application or web service.

What is Postman?

It is the only complete API development environment, used by nearly five million developers and more than 100,000 companies worldwide.
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Why do developers choose OpenAPI?
Why do developers choose Postman?
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      What companies use OpenAPI?
      What companies use Postman?

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      What tools integrate with OpenAPI?
      What tools integrate with Postman?

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      What are some alternatives to OpenAPI and Postman?
      JsonAPI
      t is a format that works with HTTP. A main goal of the specification is to optimize HTTP requests both in terms of the number of requests and the size of data packages exchanged between clients and servers.
      GraphQL
      GraphQL is a data query language and runtime designed and used at Facebook to request and deliver data to mobile and web apps since 2012.
      OData
      It is an ISO/IEC approved, OASIS standard that defines a set of best practices for building and consuming RESTful APIs. It helps you focus on your business logic while building RESTful APIs without having to worry about the various approaches to define request and response headers, status codes, HTTP methods, URL conventions, media types, payload formats, query options, etc.
      Amazon API Gateway
      Amazon API Gateway handles all the tasks involved in accepting and processing up to hundreds of thousands of concurrent API calls, including traffic management, authorization and access control, monitoring, and API version management.
      Insomnia REST Client
      Insomnia is a powerful REST API Client with cookie management, environment variables, code generation, and authentication for Mac, Window, and Linux.
      See all alternatives
      Decisions about OpenAPI and Postman
      Noah Zoschke
      Noah Zoschke
      Engineering Manager at Segment · | 28 upvotes · 169K views
      atSegmentSegment
      Swagger UI
      Swagger UI
      ReadMe.io
      ReadMe.io
      Markdown
      Markdown
      Postman
      Postman
      #QA
      #Api
      #Documentation

      We just launched the Segment Config API (try it out for yourself here) — a set of public REST APIs that enable you to manage your Segment configuration. A public API is only as good as its #documentation. For the API reference doc we are using Postman.

      Postman is an “API development environment”. You download the desktop app, and build API requests by URL and payload. Over time you can build up a set of requests and organize them into a “Postman Collection”. You can generalize a collection with “collection variables”. This allows you to parameterize things like username, password and workspace_name so a user can fill their own values in before making an API call. This makes it possible to use Postman for one-off API tasks instead of writing code.

      Then you can add Markdown content to the entire collection, a folder of related methods, and/or every API method to explain how the APIs work. You can publish a collection and easily share it with a URL.

      This turns Postman from a personal #API utility to full-blown public interactive API documentation. The result is a great looking web page with all the API calls, docs and sample requests and responses in one place. Check out the results here.

      Postman’s powers don’t end here. You can automate Postman with “test scripts” and have it periodically run a collection scripts as “monitors”. We now have #QA around all the APIs in public docs to make sure they are always correct

      Along the way we tried other techniques for documenting APIs like ReadMe.io or Swagger UI. These required a lot of effort to customize.

      Writing and maintaining a Postman collection takes some work, but the resulting documentation site, interactivity and API testing tools are well worth it.

      See more
      Jagdeep Singh
      Jagdeep Singh
      Tech Lead at ucreate.it · | 7 upvotes · 17.1K views
      atucreateucreate
      Postman
      Postman

      I use Postman because of the ease of team-management, using workspaces and teams, runner, collections, environment variables, test-scripts (post execution), variable management (pre and post execution), folders (inside collections, for better management of APIs), newman, easy-ci-integration (and probably a few more things that I am not able to recall right now).

      See more
      Nicholas Rogoff
      Nicholas Rogoff
      at Avanade UK Ltd. · | 7 upvotes · 73K views
      atNHS Digital (NHS.UK)NHS Digital (NHS.UK)
      Visual Studio
      Visual Studio
      Visual Studio Code
      Visual Studio Code
      Newman
      Newman
      Postman
      Postman
      Azure DevOps
      Azure DevOps
      Git
      Git
      jQuery
      jQuery
      JavaScript
      JavaScript
      Microsoft SQL Server
      Microsoft SQL Server
      C#
      C#
      .NET Core
      .NET Core

      Secure Membership Web API backed by SQL Server. This is the backing API to store additional profile and complex membership metadata outside of an Azure AD B2C provider. The front-end using the Azure AD B2C to allow 3rd party trusted identity providers to authenticate. This API provides a way to add and manage more complex permission structures than can easily be maintained in Azure AD.

      We have .Net developers and an Azure infrastructure environment using server-less functions, logic apps and SaaS where ever possible. For this service I opted to keep it as a classic WebAPI project and deployed to AppService.

      • Trusted Authentication Provider: @AzureActiveDirectoryB2C
      • Frameworks: .NET Core
      • Language: C# , Microsoft SQL Server , JavaScript
      • IDEs: Visual Studio Code , Visual Studio
      • Libraries: jQuery @EntityFramework, @AutoMapper, @FeatureToggle , @Swashbuckle
      • Database: @SqlAzure
      • Source Control: Git
      • Build and Release Pipelines: Azure DevOps
      • Test tools: Postman , Newman
      • Test framework: @nUnit, @moq
      • Infrastructure: @AzureAppService, @AzureAPIManagement
      See more
      Jason Barry
      Jason Barry
      Cofounder at FeaturePeek · | 4 upvotes · 39.4K views
      atFeaturePeekFeaturePeek
      Dropbox
      Dropbox
      Paw
      Paw
      Postman
      Postman
      Insomnia REST Client
      Insomnia REST Client

      We've tried a couple REST clients over the years, and Insomnia REST Client has won us over the most. Here's what we like about it compared to other contenders in this category:

      • Uncluttered UI. Things are only in your face when you need them, and the app is visually organized in an intuitive manner.
      • Native Mac app. We wanted the look and feel to be on par with other apps in our OS rather than a web app / Electron app (cough Postman).
      • Easy team sync. Other apps have this too, but Insomnia's model best sets the "set and forget" mentality. Syncs are near instant and I'm always assured that I'm working on the latest version of API endpoints. Apps like Paw use a git-based approach to revision history, but I think this actually over-complicates the sync feature. For ensuring I'm always working on the latest version of something, I'd rather have the sync model be closer to Dropbox's than git's, and Insomnia is closer to Dropbox in that regard.

      Some features like automatic public-facing documentation aren't supported, but we currently don't have any public APIs, so this didn't matter to us.

      See more
      Interest over time
      Reviews of OpenAPI and Postman
      Avatar of sergiotapia
      Senior Software Engineer
      Review ofPostmanPostman

      If you're building an API service, this Chrome extension is a must-have. It'll let you ping your endpoints using a nice clean UI that's built right into Chrome. You can also share your previous requests - a simple way to 'document' your API if you're short on time.

      Avatar of DaneLyons
      Cofounder
      Review ofPostmanPostman

      If someone is having trouble shipping data to the Knowtify API, I almost always share my postman collection. Working through the issue from there is typically pretty easy.

      Avatar of jgentes
      Founder of StartupCommunity.org at The Social Business
      Review ofPostmanPostman

      Not much to say, it's the best free tool out there for testing APIs. Get it.

      How developers use OpenAPI and Postman
      Avatar of shridhardalavi
      shridhardalavi uses PostmanPostman

      Postman is a powerful tool for performing integration testing with your API. It allows for repeatable, reliable tests that can be automated and used in a variety of environments and includes useful tools for persisting data and simulating how a user might actually be interacting with the system

      Avatar of Scrayos UG (haftungsbeschränkt)
      Scrayos UG (haftungsbeschränkt) uses PostmanPostman

      We use Postman in conjunction with our universal REST-API "JCVortex". Postman makes testing edge-cases hassle-free and lets testing look easy. Postman was also a great help to explore the Mojang-API, that we are dependent on, because it is the central repository for minecraft-account-data.

      Avatar of Rashid Muhammad
      Rashid Muhammad uses PostmanPostman

      I use it for testing my Web Api. It's a easy tool for interacting with a RESTFul API and provides great tools for organizing requests. The Newman tool is great for allowing your tests to run in a CI/CD pipeline.

      Avatar of Xpertz
      Xpertz uses PostmanPostman

      Used to test API endpoints and monitor API which also acts as an API heartbeat to keep functions alive in Google Cloud in order to avoid timeout responses to Slack.

      Avatar of David Flynn
      David Flynn uses PostmanPostman

      We use Postman for all our API testing. Postman is invaluable. We would like to have a team licence so that we can use shared work spaces and test collections.

      How much does OpenAPI cost?
      How much does Postman cost?
      Pricing unavailable
      News about OpenAPI
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