Insomnia vs Scalar

Comparing two open source alternatives to Postman . Use the comparison below to decide which one fits your needs.

Insomnia

Apache-2.0

The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.

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Scalar

MIT

Scalar is an open-source API platform:　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　🌐 Modern Rest API Client　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　📖 Beautiful API References　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　✨ 1st-Class OpenAPI/Swagger Support

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Side-by-side comparison

	Insomnia	Scalar
License	Apache-2.0	MIT
Self-hostable	No	No
GitHub Stars	38,224	14,431
Forks	2,257	790
Open Issues	819	132
Last Commit	Mar 27, 2026	Mar 28, 2026
First Released	Apr 23, 2016	Aug 16, 2023
Categories	API Development & Testing Tools	API Development & Testing Tools
Tags	#API #rest #http client #api client	#API #api client #rest #http client

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