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grpcurl vs Buf Studio: catalog facts
grpcurl	Buf Studio
Free The open-source application is available without a license fee.	Free Used on the Buf website; check Buf for current terms of the wider Schema Registry.
Windows, macOS, Linux, Command line	Web
Browse schemas and invoke RPC methods	Sends gRPC and Connect requests from a browser Works with schemas in the Buf Schema Registry
Servers without reflection require proto or protoset files.	Limited to Protobuf-based APIs Few details on features or pricing in the available research
Downloadable app	Web application
Open source	Closed source
License: MIT	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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