Tunnl said it was named to the 2026 Inc. 5000, Inc. magazine's annual ranking of the fastest-growing private companies in the United States, as demand grows for AI-driven audience intelligence tools that connect research and marketing execution. The company said it was one of 126 Artificial Intelligence and Data companies on this year's list and that its platform combines survey research, audience targeting, activation and campaign measurement in a closed-loop system. Tunnl said it has expanded over the past 12 months by adding Fortune 500 clients across healthcare, financial services and consumer technology, while its Q1 2026 activity showed four times more custom research projects than a year earlier. It also said the number of custom surveys launched in the first quarter alone matched the total fielded in all of 2025. Founded in 2021 by Sara Fagen and Brent Seaborn, Tunnl said it serves pharmaceutical manufacturers, trade associations, Fortune 500 brands, media agencies and advocacy organizations operating in high-stakes communications environments where audience precision can shape business and reputational outcomes.