Alexa Tonner is the Co-Founder and Chief Operating Officer of Collectively, a global leader in creator marketing that transforms brands into social-first enterprises, part of the Brandtech Group. Since co-founding Collectively in 2013, Alexa has built a strategic, multi-disciplinary team that helps brands navigate and master the evolving creator marketing landscape.

As the first women-founded influencer marketing agency and the category creators of influencer marketing, Collectively quickly rose to prominence as the #1 strategy-led, data-backed creator marketing partner of choice for world leading brands including Unilever, Intuit QuickBooks, Salesforce, and Signet.

Under Alexa's leadership, Collectively became the first influencer marketing agency recognized by Fast Company's Most Innovative Companies in Advertising. Over the years, the agency has earned prestigious industry recognition for driving cultural impact and measurable business results from Cannes Lions, OMMAs, Effies, Webbys, Shortys, Global Influencer Marketing Awards, Glossy, and Digiday. In 2026, Alexa was named an ADWEEK Architects of Culture Honoree and Collectively was named one of ADWEEK's Fastest Growing Agencies and Top 10 women-led agencies.

Prior to co-founding Collectively, Alexa managed influencer communities and brand-influencer partnerships for ad networks, including Mode Media, Federated Media, and Foodbuzz, where she helped shape the discipline of influencer marketing as a powerful new way to market products and ideas.