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rapidgzip vs pigz: catalog facts
rapidgzip	pigz
Free Free and open source, dual-licensed under MIT and Apache 2.0.	Free Free and open source with no paid tier.
Command line	Linux, Command line
Parallel decompression of ordinary gzip files Fast random access into compressed files	Uses all CPU cores when compressing Output is standard gzip format
Focused on decompression of gzip only Benefits depend on having many CPU cores	Decompression gains little from multiple cores Distributed as source code; you may need to compile it
Downloadable app	Downloadable app
Open source	Open source
License: MIT OR Apache-2.0	License: Zlib
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 September 23, 2026

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