NORTHAMPTON, MA (August 21, 2025) — Marketing Doctor, a nationally recognized, woman-owned media agency based in Massachusetts, is proud to announce its acquisition by Gravity Global, one of the world’s most awarded brand-to-demand marketing agencies, working with 3M, Banco Santander, Honda, Embraer, and more.
The acquisition marks a new chapter for Marketing Doctor, which, since its founding in 2003, has grown from a one-woman startup to an Inc. 5000 Fastest Growing Private Companies in America honoree, with five consecutive placements on the list, a feat less than one percent of applying companies achieve. Of that less than 1%, only a small handful are women owned.
“I hope our journey inspires other women entrepreneurs to build boldly and grow with purpose,” says Janet Casey, Founder and CEO of Marketing Doctor.
Under the vision and leadership of Founder and CEO Janet Casey, one of Adweek’s Women Trailblazers, the Marketing Doctor team has specialized in strategic, full-funnel paid media across traditional, digital, and emerging platforms.
Their client roster grew to a national and international scale with campaigns in 50 US states and 16 countries, including cornerstone clients such as Skullcandy, New York Bariatric Group, Papa Gino’s Pizzeria, D’Angelo Grilled Sandwiches, the federal government, and more. In recent years, Marketing Doctor expanded globally, adding top talent in Argentina, Colombia, and the Philippines.
“Marketing Doctor is the kind of partner that transforms outcomes,” said Jose Lozano, North America CEO at Gravity Global. “Their focus on measurable impact and trusted client relationships makes them a perfect addition to our global offering.”
Marketing Doctor’s focus on results has earned it recognition from Inc., Adweek, and Ad Age as one of the fastest-growing and best places to work in the industry.
Marketing Doctor joins Gravity’s growing organization, bringing added strength in regulated sectors and complex markets, alongside deep expertise in data-driven full-funnel paid media.
“I selected Gravity Global because their incredible team is uniquely positioned for the fast-moving future of marketing,” said Janet Casey. “In an era defined by AI and ever-evolving tech stacks, having partners who are not just tech-savvy, but also ‘good eggs’—ethical, creative, and forward-thinking—is essential. Gravity Global embodies these values, and I’m confident this combined force will deliver exceptional value for our clients.”
As Gravity Global, the agency team will proudly continue operating from its Northampton headquarters, now integrated into the global framework of creative, digital, and strategic capabilities.
About Marketing Doctor, Inc.
Marketing Doctor is a woman-owned, full-service paid media agency dedicated to exceeding expectations. Integrating data, AI, and measurement methodologies, Marketing Doctor delivers strategic regional, national, and global paid media campaigns across traditional, digital, paid social, and emerging media channels, including programmatic, connected television (CTV), and streaming platforms. Founded in 2003, Marketing Doctor has grown exponentially since then. The agency has been recognized on the Inc. 5000 Fastest-Growing Private Companies in America list for five consecutive years as well as the Inc. 5000 Regionals: Northeast list in 2024. They have also earned global and national marketing industry awards from Adweek and Ad Age, including Fastest-Growing Agencies Globally and Best Place to Work.
About Gravity Global
Gravity Global is a global brand-to-demand marketing consultancy specializing in clients operating in complex markets. Its focus on a proprietary model, F.A.B. (Fame, Admiration and Belief) has been the cornerstone of clients’ business growth. Founded in 2009 by Mark Lethbridge, Paul Anderson and Sean Feast and now backed by Elysian Capital, Gravity Global has 400 employees across the United States, Europe, and APAC.
NORTHAMPTON, MA (August 21, 2025) — Marketing Doctor, a nationally recognized, woman-owned media agency based in Massachusetts, is proud to announce its acquisition by Gravity Global, one of the world’s most awarded brand-to-demand marketing agencies, working with 3M, Banco Santander, Honda, Embraer, and more.
The acquisition marks a new chapter for Marketing Doctor, which, since its founding in 2003, has grown from a one-woman startup to an Inc. 5000 Fastest Growing Private Companies in America honoree, with five consecutive placements on the list, a feat less than one percent of applying companies achieve. Of that less than 1%, only a small handful are women owned.
“I hope our journey inspires other women entrepreneurs to build boldly and grow with purpose,” says Janet Casey, Founder and CEO of Marketing Doctor.
Under the vision and leadership of Founder and CEO Janet Casey, one of Adweek’s Women Trailblazers, the Marketing Doctor team has specialized in strategic, full-funnel paid media across traditional, digital, and emerging platforms.
Their client roster grew to a national and international scale with campaigns in 50 US states and 16 countries, including cornerstone clients such as Skullcandy, New York Bariatric Group, Papa Gino’s Pizzeria, D’Angelo Grilled Sandwiches, the federal government, and more. In recent years, Marketing Doctor expanded globally, adding top talent in Argentina, Colombia, and the Philippines.
“Marketing Doctor is the kind of partner that transforms outcomes,” said Jose Lozano, North America CEO at Gravity Global. “Their focus on measurable impact and trusted client relationships makes them a perfect addition to our global offering.”
Marketing Doctor’s focus on results has earned it recognition from Inc., Adweek, and Ad Age as one of the fastest-growing and best places to work in the industry.
Marketing Doctor joins Gravity’s growing organization, bringing added strength in regulated sectors and complex markets, alongside deep expertise in data-driven full-funnel paid media.
“I selected Gravity Global because their incredible team is uniquely positioned for the fast-moving future of marketing,” said Janet Casey. “In an era defined by AI and ever-evolving tech stacks, having partners who are not just tech-savvy, but also ‘good eggs’—ethical, creative, and forward-thinking—is essential. Gravity Global embodies these values, and I’m confident this combined force will deliver exceptional value for our clients.”
As Gravity Global, the agency team will proudly continue operating from its Northampton headquarters, now integrated into the global framework of creative, digital, and strategic capabilities.
About Marketing Doctor, Inc.
Marketing Doctor is a woman-owned, full-service paid media agency dedicated to exceeding expectations. Integrating data, AI, and measurement methodologies, Marketing Doctor delivers strategic regional, national, and global paid media campaigns across traditional, digital, paid social, and emerging media channels, including programmatic, connected television (CTV), and streaming platforms. Founded in 2003, Marketing Doctor has grown exponentially since then. The agency has been recognized on the Inc. 5000 Fastest-Growing Private Companies in America list for five consecutive years as well as the Inc. 5000 Regionals: Northeast list in 2024. They have also earned global and national marketing industry awards from Adweek and Ad Age, including Fastest-Growing Agencies Globally and Best Place to Work.
About Gravity Global
Gravity Global is a global brand-to-demand marketing consultancy specializing in clients operating in complex markets. Its focus on a proprietary model, F.A.B. (Fame, Admiration and Belief) has been the cornerstone of clients’ business growth. Founded in 2009 by Mark Lethbridge, Paul Anderson and Sean Feast and now backed by Elysian Capital, Gravity Global has 400 employees across the United States, Europe, and APAC.
