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Understand the differences before you shortlist.

Postman×Insomnia×RapidAPI×
AttributePostmanOther licenseInsomniaOpen sourceRapidAPIOther license
Overview
Primary focusDesign, send, and test API requestsOpen-source API client for REST, GraphQL and gRPCAPI marketplace for discovering, testing and monetizing APIs
DeploymentNot specifiedNot specifiedNot specified
Source modelOther licenseOpen sourceOther license
Pricing modelfreemiumopen sourcefreemium
API availableNot specifiedYesYes
Windows desktopNot specifiedNot specifiedNot specified
Mobile appNot specifiedNot specifiedNot specified
OverviewPostman gives API teams a request client, shared collections, test scripts, documentation workflows, and automated collection runs.Insomnia is a free, open-source desktop API client from Kong for designing, testing and debugging REST, GraphQL, gRPC and WebSocket APIs, with optional paid team collaboration plans.RapidAPI is a marketplace for discovering, testing and consuming third-party APIs from one account and SDK. Nokia acquired the company in 2023; the marketplace still operates under the RapidAPI brand.
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PostmanOther license
Primary focus
Design, send, and test API requests
Deployment
Not specified
Source model
Other license
Pricing model
freemium
API available
Not specified
Windows desktop
Not specified
Mobile app
Not specified
Overview
Postman gives API teams a request client, shared collections, test scripts, documentation workflows, and automated collection runs.
InsomniaOpen source
Primary focus
Open-source API client for REST, GraphQL and gRPC
Deployment
Not specified
Source model
Open source
Pricing model
open source
API available
Yes
Windows desktop
Not specified
Mobile app
Not specified
Overview
Insomnia is a free, open-source desktop API client from Kong for designing, testing and debugging REST, GraphQL, gRPC and WebSocket APIs, with optional paid team collaboration plans.
RapidAPIOther license
Primary focus
API marketplace for discovering, testing and monetizing APIs
Deployment
Not specified
Source model
Other license
Pricing model
freemium
API available
Yes
Windows desktop
Not specified
Mobile app
Not specified
Overview
RapidAPI is a marketplace for discovering, testing and consuming third-party APIs from one account and SDK. Nokia acquired the company in 2023; the marketplace still operates under the RapidAPI brand.

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