NI Multisim does not have a permanently free full version for desktop, but you can access its features through the following official channels:
: High-performance SPICE simulation, widely used in industry. Multisim Free Download
: If you are a student, check your University's software portal or the NI Education page for discounted or institutionally-provided access. NI Multisim does not have a permanently free
Note: NI has announced that support for this platform will end on . Multisim Free Download
: A complete open-source suite for schematic capture and PCB design.