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Inso vs Step CI: catalog facts
Inso	Step CI
Free Free to download and use as part of Kong's Insomnia platform.	Freemium The open-source runner is free; the site also lists paid options and demos.
macOS, Command line	Command line
Runs Insomnia tests and collection runs in CI/CD Lints API specifications with support for custom rules	Tests REST, GraphQL, gRPC and SOAP in one format Imports from OpenAPI, Postman and Insomnia
Most useful alongside the Insomnia desktop app Command line only, no graphical interface	No graphical interface for manual requests Requires Node.js or Docker to run
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.