custom SERS substrates designed according to specific experimental requirements. These substrates are used by academic and industrial laboratories for trace detection of biomolecules, pharmaceuticals, environmental contaminants, dyes, and viral and bacterial markers. SERSitive supports users with technical guidance on substrate selection, sample preparation, and measurement conditions. Its products are referenced in scientific publications covering biomedical sensing, food safety, photonics, and materials research that rely on surface-enhanced Raman spectroscopy.