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grpcurl vs grpcui: catalog facts
grpcurl	grpcui
Free The open-source application is available without a license fee.	Free Free and open source under the MIT licence.
Windows, macOS, Linux, Command line	Web, Command line
Browse schemas and invoke RPC methods	Browser forms for calling gRPC methods Postman-style workflow for gRPC rather than REST
Servers without reflection require proto or protoset files.	Covers gRPC only, not REST or GraphQL Launched from the command line rather than as a desktop app
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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