
Postman
Hoppscotch
RapidAPI for Mac
HTTPie
soapUI
Bruno
Thunder Client
Design, debug, test, and mock APIs locally, on Git, or cloud. Build better APIs collaboratively for the most popular protocols with a dev‑friendly UI, built-in automation, and an extensible plugin ecosystem.

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Which is more popular?
Based on our record, Insomnia REST seems to be more popular. It has been mentioned 134 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | insomnia.rest | opalstack.com |
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| Company | Startup from the United States | — |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
3 Reasons to use Insomnia REST Client in your Exploratory API Testing
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Insomnia REST and Opalstack. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Product Introduction: Insomnia is a powerful open-source API client designed for simplicity and efficiency and works great as a postman alternative. It supports REST, GraphQL, and gRPC, making it versatile for various...
It is a free, open-source platform that boasts a user-friendly interface and robust features like environment and collection management, code snippets, and test automation. Compared to Postman, Insomnia offers a...
Insomnia is a user-friendly tool for API development and testing. Insomnia allows creating and sending HTTP and REST requests, like GET, POST, PUT, DELETE, and more. Users can view API responses, including status...
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Recommendations tracked on public social media and blogs since March 2021.


Apidog offers 4 users free with unlimited everything. Bruno has built a passionate community around privacy-first API testing. Insomnia continues to improve with strong multi-protocol support. - Source: dev.to / 6 months ago
Insomnia balances professional-grade features with strong offline capabilities. Its Scratch Pad and Local Vault features ensure sensitive data remains on your local machine while providing comprehensive protocol support. - Source: dev.to / 11 months ago
I ditched Postman for Insomnia (Open source) after Postman refused to adhere to customers to disable auto-updates for 6 years+. I checked on their GitHub issue tracker and it turns out, the solution was to upgrade to their "Enterprise... - Source: Hacker News / 11 months ago
Tracking Opalstack since Sep 2023.
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CLI HTTP that will make you smile. JSON support, syntax highlighting, wget-like downloads, extensions, and more.
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SoapUI Pro is one of the most prominent API testing platforms around, allowing developers to quickly prototype the functions of their apps and get them to market with little hassle.
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Bruno is a Git-integrated, fully offline, and open-source API client
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