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