Menlo Systems GmbH is taking orders for the Tera-Lyzer terahertz (THz) data evaluation software developed by LyTera. It enables advanced data analysis and brings terahertz time-domain spectroscopy (TDS) experiments to the next level. It is for the extraction of sample thickness, enabling investigation of sub-100-µm samples without the need for a differential measuring setup. Simultaneously, complex terahertz material parameters of the sample are determined, allowing for a variety of substances. Another feature enables analysis of multilayer systems in a standard THz-TDS setup, opening the door for new experiments. TeraLyzer incorporates multistep procedures where, in a first step, the experimental THz-TDS data is imported into a time-domain preprocessor, minimizing jitter and amplitude drift-induced errors, removing signal offsets and offering windowing functionality.