India’s digital ad spend is projected to reach $14.56 billion in 2026, and digital advertising now accounts for 68% of all advertising investment in the country. The technology powering every programmatic campaign, every mobile ad, and every CTV placement in this market comes from AdTech companies. This guide covers the 15 most important ones for building and running that infrastructure in India right now. What Is AdTech and Why Does It Matter in 2026? AdTech stands for Advertising Technology. It is the collection of software, data tools, and platforms that help brands reach the right audience at the right time on…