Fluency is a Digital Advertising Operating System that centralizes the execution and management of paid media across all major channels into a single platform, enabling agencies and brands to automate campaigns at massive scale. Founded in 2017 and based in Vermont, Fluency powers nearly $3B in annual media spend and over 250,000 monthly campaigns. Its agentic AI features provide autonomous campaign oversight, such as automatically swapping out underperforming creatives, and integrate models from Amazon Bedrock, Anthropic's Claude, and Google's Gemini. The platform spans walled gardens like Google and Meta as well as the open web, helping advertising operations teams remove manual, repetitive work. Fluency raised a $40M Series A led by Integrity Growth Partners in December 2025 to expand its agentic AI capabilities, grow publisher integrations, and scale its team from under 120 to around 200 employees.