List of advertising technology companies

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Advertising technology (ad tech) companies create tools that help run online ads. They help advertisers reach the right people, help publishers sell ad space, and provide ways to measure results. The list covers platforms for buying and selling ads, managing data, delivering ads, and analyzing performance. Common types include:

- Demand-side platforms (DSPs) for advertisers to buy ad space programmatically
- Supply-side platforms (SSPs) for publishers to sell inventory
- Ad exchanges and marketplaces that connect buyers and sellers
- Ad servers that deliver ads to pages
- Data management platforms (DMPs) that organize audience data
- Creative optimization and personalization tools
- Analytics, attribution, and measurement tools
- Fraud detection and brand safety tools

These companies form the core of online advertising today.