AI agents for end-to-end ad campaign management in 2026 are software systems from OpenAI, Google, Microsoft, Salesforce, Adobe, HubSpot, Jasper, and specialist marketing vendors that help plan, create, target, optimize, analyze, and report on digital campaigns across advertising and customer-data platforms. The useful answer is not that one of them “wins.” The useful answer is that the market has split into two camps: agents that live inside ad platforms, and agents that sit above them...