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Inso vs Venom: catalog facts
Inso	Venom
Free Free to download and use as part of Kong's Insomnia platform.	Free Free and open source, maintained by OVHcloud.
macOS, Command line	Windows, macOS, Linux, Command line
Runs Insomnia tests and collection runs in CI/CD Lints API specifications with support for custom rules	Tests are written as declarative files that are easy to review Several executors including HTTP, scripts, web and IMAP
Most useful alongside the Insomnia desktop app Command line only, no graphical interface	No graphical interface for building requests Test file format takes some learning
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: Apache-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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