MicroSIP Open Source Portable Free Voice Over IP

MicroSIP is Free VO IP "Voice Over IP" software. It can be used to send and receive phone calls or video calls (Point to Point) for Free by IP address. The application supports sending to other people who use the software, or to telephones via your favorite non-free SIP provider.

This Open Source tool is also lightweight coming in at less than 19MB extracted. Another perk is that it is portable and can be stored and run entirely from a removable device such as a USB flash drive. The application keeps track of all changes by saving them back to an ini file stored on the external media.

Free VO IP Software (MicroSIP)

MicroSIP - Free VO IP

Authors Website: Project Page

Extracted Size: < 19 MB

License: Open Source

Supported Operating Systems: Windows 11/10/8/7/XP, Linux, Mac OS, BSD, and WINE

How to run this Free VO IP Portably from USB

  1. Download and extract the contents of the "portable" version using 7-Zip
  2. Run microsip.exe from the extracted folder to launch the program

If you like this tool, you might be interested in this name to phone number converter.