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Publisher · Open source

oberhumer.com

oberhumer.com GmbH is an Austrian company specializing in data compression and cryptography, known for the LZO, lzop and UCL libraries and the UPX executable packer. Its open-source packages are GPL licensed, and LZO is also available under a commercial licence.

Licensing at a Glance

  • Open source
  • OEM / bundled

  1. oberhumer.com states that its open-source packages, including LZO, lzop and UCL, are distributed under the GNU General Public License.[1]

  2. LZO is distributed under the GNU GPL version 2 or later, with commercial licences available through the LZO Professional program.[2]

  3. LZO Professional is a commercial licence for those who do not want to comply with the GPL and grants the right to use and distribute LZO commercially; LZO Professional Plus is an optimized version licensed at an extra fee.[3]

  4. UPX is GPL-licensed with a special exception that allows free use of UPX for all executables, including commercial programs, subject to the restrictions in the UPX licence.[4]

Products

References

  1. oberhumer.com: Open Source · oberhumer.com · retrieved 2026-09-27
  2. oberhumer.com: LZO real-time data compression library · oberhumer.com · retrieved 2026-09-27
  3. oberhumer.com: LZO Professional real-time data compression library · oberhumer.com · retrieved 2026-09-27
  4. UPX LICENSE · raw.githubusercontent.com · retrieved 2026-09-27
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