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b3sum vs RHash: catalog facts
b3sum	RHash
Free Free and open source, dual-licensed under CC0 and Apache 2.0.	Free Free and open source under the 0BSD licence.
Windows, Command line	Windows, Linux, Command line
Familiar sha256sum-style interface BLAKE3 hashing is fast on large files	Supports a wide range of hash algorithms Calculates several hash sums in one pass
BLAKE3 checksums are less widely published than SHA-256 ones No prebuilt releases on the GitHub repository	Command line only, no graphical interface Many listed algorithms are legacy or niche
Downloadable app	Downloadable app
Open source	Open source
License: CC0-1.0 OR Apache-2.0	License: 0BSD
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.