AEHR vs CSTL Comparison

Aehr Test Systems is engaged in test systems for burning-in and testing logic, optical, and memory integrated circuits. Increased quality and reliability needs of the Automotive and Mobility integrated circuit markets. The Company operates in one business segment, the designing, manufacturing, marketing and selling of advanced test and burn-in products to the semiconductor manufacturing industry in several geographic areas. The company provides production solutions across the product manufacturing flow to improve yield and reliability and has developed and introduced several inventive products, including the ABTSTM and FOX-PTM families of test and burn-in systems and FOX WaferPakTM Aligner, FOX-XP WaferPak Contactor, FOX DiePak Carrier and FOX DiePak Loader.

Castle Biosciences Inc is a molecular diagnostics company. The group provides test solutions for the diagnosis and treatment of dermatologic cancers, Barrett's esophagus (BE), and uveal melanoma. The product portfolio of the company includes DecisionDx-Melanoma, a risk stratification gene expression profile (GEP) test; DecisionDx-SCC, a risk stratification test for cutaneous squamous cell carcinoma; MyPath Melanoma, a diagnostic GEP test for use in patients with difficult-to-diagnose melanocytic lesions; and TissueCypher, a test to predict future development of progression of high-grade dysplasia and/or esophageal cancer. The company derives revenues through the delivery of test reports for its molecular diagnostic tests.