vTiger
vTiger CRM consolidates lead capture, sales automation, and helpdesk capabilities into one open-source or cloud-based platform. The lead management module lets teams import leads, assign them, and build nurturing sequences with email or SMS. In-depth contact records show historical interactions, social media links, and upcoming events. A forecasting module predicts revenue based on pipeline progression. Users can add quotes or invoices within the same interface. vTiger’s open-source option appeals to developers wanting heavy customization, while its cloud version offers quick deployment and simpler updates.