Desktop CRM with WhatsApp Integration

I need a desktop-based CRM that keeps my entire customer journey in one place. The core of the app is straightforward contact management: add, edit, tag and search records quickly, with bulk import/export so my existing CSV files drop straight in... (Budget: ₹600 - ₹1500 INR, Jobs: API Integration, C# Programming, Database Management, Desktop Application, Java, Python, Software Development, Software Engineering)