Multisim Portable (2024)
On some Chinese forums like bbs.elecfans.com, you can find a "Multisim 14.3 绿色版". This is about as close as you can get to a portable version. However, this "green version" is not a true portable app in the strictest sense.
Multisim Portable is an unofficial, "unauthorized" version of the industry-standard NI Multisim circuit simulation software. While the official Multisim requires a hefty installation, license activation, and ties to National Instruments hardware, the "Portable" version promises the full power of SPICE simulation in a standalone executable. multisim portable