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socatstunnel
Free

Free and open source under the GPL.

 Free

Free under the GPL 2.0 or later, with paid commercial support and non-GPL licences…

macOS, Linux, Command line Windows, Linux, Command line
  • Connects almost any pair of endpoints, including TLS and serial devices
  • Handles forking servers and complex options netcat cannot
  • Adds TLS to existing programs without code changes
  • Supports load balancing for larger deployments
  • The address syntax is dense and unforgiving
  • The project site is served over plain HTTP only, so the repository is linked here instead
  • Configured through text files, with no graphical setup
  • Not a community project; development is controlled by the author
Downloadable app Downloadable app
Open source Open source
License: GPL-2.0 License: GPL-2.0-or-later
Not stated if an account is needed No account needed
Not stated if it works offline Not stated if it works offline

Checked September 22, 2026

Checked October 2, 2026

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