Manage Digital Marketing On Custom CRM

I already run my sales and customer data inside a custom-built CRM and now I want every piece of our digital marketing to live there too. The goal is simple: plan, launch, automate and measure campaigns from one dashboard so I can stop jumping between separate tools... (Budget: ₹1500 - ₹12500 INR, Jobs: API Integration, CRM, Data Analysis, Digital Marketing, Google Analytics, PHP, Software Architecture)