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Collision vs CalHash: catalog facts
Collision	CalHash
Free Free and open source under the BSD 2-Clause licence.	Free Free to use; the developer accepts donations.
Linux	macOS
Simple graphical way to verify downloads No need for terminal checksum commands	Calculates and compares checksums in a simple Mac interface Builds matched to each macOS release
Linux only Focused on hashing, with no other file tools	macOS only Each build works only on its matching macOS version
Downloadable app	Downloadable app
Open source	Closed source
License: BSD-2-Clause	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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