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ghz vs Fortio: catalog facts
ghz	Fortio
Free Free and open source under the Apache 2.0 licence.	Free Free to use, with the source code published on GitHub.
Windows, Command line	Web, Self-hosted, Command line
Works from proto files, protosets or server reflection Covers unary, streaming and duplex calls	Fixed queries-per-second load for repeatable tests Latency histograms and detailed statistics
Only for gRPC, not plain HTTP APIs The web application is still in beta	Aimed at developers and operators rather than casual users Measures servers under load, not page rendering speed
Downloadable app	Downloadable app, Self-hosted
Open source	Closed source
License: Apache-2.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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