LTspice
LTspice is a free, high-performance SPICE simulator distributed by Analog Devices — the most widely used SPICE tool in industry for power-electronics, switching converters, and analog circuit design.
Full Pricing Breakdown
Key Capabilities
Technical Audit
The Pros
- Completely free — no node-lock, no per-seat
- Famously fast and stable SPICE solver
- Huge community of models and example circuits
The Cons
- Schematic editor UI is utilitarian
- No PCB layout — strictly simulation
- Documentation is sparse; learning is community-driven
CADGuide Verdict
Final Professional Conclusion
"The free SPICE that every analog engineer has installed — the industry's quietest, most-used EDA tool."
Expert Q&A
?What is LTspice used for?
Free SPICE simulator from Analog Devices, the de facto industry standard for analog design. LTspice is an EDA solution widely adopted in Electronics, Power, Education.
?How much does LTspice cost?
LTspice is completely free for both personal and commercial use. Vendor support and commercial services may be offered separately.
?Is LTspice really free?
Yes — LTspice is a free product distributed by the vendor. You can download and use it without paying a license fee. Premium services, training, or vertical add-ons may be sold separately.
?What operating systems does LTspice support?
LTspice runs on Windows and macOS.
?Which file formats does LTspice support?
LTspice works with standard EDA interchange formats including Gerber, IPC-2581, and ODB++. Check the vendor's official documentation for the complete list of supported import and export options.
?What are the best alternatives to LTspice?
The closest alternatives within the EDA space are CircuitMaker, KiCad, Altium Designer. The right fit depends on whether you prioritise file-format compatibility, geometry kernel, ecosystem of plugins, or pricing model — compare them side-by-side using the CADGuide comparison tool.
