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Insomnia vs Stoplight: catalog facts
Insomnia	Stoplight
Freemium Free to use, with a free account unlocking most features. Kong sells paid plans for teams…	Freemium A free plan is available to get started, with paid plans for larger teams.
Windows, macOS, Linux	Web
REST, GraphQL, gRPC, WebSockets and Server-Sent Events in one client Local Vault and Git Sync mean the cloud is optional	Visual OpenAPI editor that needs little specialised knowledge Mock servers from the API description
Most features expect an account, even though a Scratch Pad works without one The 2023 move to account-first storage cost it a lot of goodwill	Hosted service that requires an account Focused on teams and organisations rather than individual use
Downloadable app	Web application, Hosted service
Open source	Closed source
License: Apache-2.0	License not stated
No account needed	Account needed
Works offline	Needs internet
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

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