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Insomnia vs grpcurl: catalog facts
Insomnia	grpcurl
Freemium Free to use, with a free account unlocking most features. Kong sells paid plans for teams…	Free The open-source application is available without a license fee.
Windows, macOS, Linux	Windows, macOS, Linux, Command line
REST, GraphQL, gRPC, WebSockets and Server-Sent Events in one client Local Vault and Git Sync mean the cloud is optional	Browse schemas and invoke RPC methods
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	Servers without reflection require proto or protoset files.
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: MIT
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 22, 2026

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