With the increasing pervasiveness of ICTs in the fabric of economic activities, the corporate digital divide has emerged as a new crucial topic to evaluate the IT competencies and the digital gap between firms and territories. Given the scarcity of available granular data to measure the phenomenon, most studies have used survey data. To bridge the empirical gap, we scrape the website homepage of 182 705 Italian firms, extracting ten features related to their digital footprint characteristics to develop a new corporate digital assessment index. Our results highlight a significant digital divide across dimensions, sectors and geographical locations of Italian firms, opening up new perspectives on monitoring and near-real-time data-driven analysis.