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Step CI vs Schemathesis: catalog facts
Step CI	Schemathesis
Freemium The open-source runner is free; the site also lists paid options and demos.	Free The command-line tool is free and open source.
Command line	Command line
Tests REST, GraphQL, gRPC and SOAP in one format Imports from OpenAPI, Postman and Insomnia	Generates edge-case requests automatically from an existing schema Validates responses against the OpenAPI specification
No graphical interface for manual requests Requires Node.js or Docker to run	Needs an OpenAPI or GraphQL schema to work from Command-line only, with no graphical client for manual requests
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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