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Venom vs Assertible: catalog facts
Venom	Assertible
Free Free and open source, maintained by OVHcloud.	Freemium Hosted service that requires sign-up; see the site for plans.
Windows, macOS, Linux, Command line	Web
Tests are written as declarative files that are easy to review Several executors including HTTP, scripts, web and IMAP	Continuous monitoring as well as one-off tests Syncs tests with an imported API specification
No graphical interface for building requests Test file format takes some learning	Requires an account Hosted only, with no self-hosted option mentioned
Downloadable app	Hosted service
Open source	Closed source
License: Apache-2.0	License not stated
No account needed	Account needed
Not stated if it works offline	Needs internet
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.