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Assertible vs Step CI: catalog facts
Assertible	Step CI
Freemium Hosted service that requires sign-up; see the site for plans.	Freemium The open-source runner is free; the site also lists paid options and demos.
Web	Command line
Continuous monitoring as well as one-off tests Syncs tests with an imported API specification	Tests REST, GraphQL, gRPC and SOAP in one format Imports from OpenAPI, Postman and Insomnia
Requires an account Hosted only, with no self-hosted option mentioned	No graphical interface for manual requests Requires Node.js or Docker to run
Hosted service	Downloadable app
Closed source	Open source
License not stated	License not stated
Account needed	Not stated if an account is needed
Needs internet	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.