Top Series B Marketing tech companies

XR Extreme Reach is the leading platform for managing advertising operations. We help brands manage all aspects of their ad creative, from talent payments and rights to ad delivery, so every ad lands how and where it should.

• Series B
• 988 employees
• Founded 2008

21GRAMS is the advertising and education arm of Real Chemistry. Ranked the #2 health agency in the world by Cannes Lions. More than a name, 21GRAMS is the philosophy that guides everything we do. Inspired by the “21 Grams Experiment” of 1907, which tried to prove the existence of a soul – we believe great work connects with the human spirit. So we get to know our audiences better than anyone (through the ancient art of human interaction and Real Chemistry’s industry-leading data and analytics) and find the 21 grams that makes people tick. Our goal? Make advertising less of an interruption – and more worth people’s time, attention, and action – because it actually “gets” them. Creatively, our mantra is “medicine should be more inspiring than sneakers”. We aren’t here just to do the best work in our industry, but the most inventive work period. That ability is heightened, as part of Real Chemistry. Interacting and combining unalike disciplines, talents, and technologies (across Clinical, Commercial, and Corporate) to create new answers to modern health’s biggest challenges.

• Series B
• 506 employees
• Founded 2017

As Canada's most recognized loyalty program, the AIR MILES coalition has more than 200 retailer brands, 100s of online retailers, and two AIR MILES credit card partners. AIR MILES Cards are swiped a thousand times a minute, every minute of every day, 7 days a week, from grocery stores to gas stations to home improvement centers, leading to a reward being redeemed every 3.3 seconds. What that means for our clients is deep, valuable insights that let them connect with their shoppers like never before.There’s a reason we’re recognized as one of the best places to work year after year: We have an amazing culture thanks to the collaboration, dedication, and fun that our teams bring to work every day. Discover our core values, stay up to date with the latest events at AIR MILES, get to know our people, and find out firsthand what makes AIR MILES such a great place to work.For more information, visit www.loyalty.com

• Series B
• 476 employees
• Founded 2014

TripleLift is the Creative SSP that transforms digital advertising through creative technology and innovative ad formats. We help publishers, advertisers, and agencies achieve measurable outcomes while enhancing user experiences.Discover how we bring creativity and results together.

• Series B
• 366 employees
• Founded 2012

Founded in 2017 in Silicon Valley, Firefly pioneered car-top advertising, transforming urban landscapes with the world’s most advanced moving digital screens. Recognized as one of Time Magazine’s Best Inventions of 2019, we have been at the forefront of the OOH industry since our launch, integrating data-driven targeting and smart city partnerships to deliver measurable high-impact campaigns.With a strong presence in all major U.S. markets, Firefly continues to expand its global footprint, operating in the UK, Canada, Spain, and the UAE. Beyond our high-impact digital tops, which deliver dynamic messaging with eye-level visibility, our static car tops, car wraps, in-car & golf screens, and experiential offerings further enhance brand reach, ensuring precision and impact in every campaign. At Firefly, we believe in empowering people—from the drivers who earn extra income through our platform to the talented team members shaping the future of OOH advertising. We foster an environment where collaboration, creativity, and growth drive everything we do.As one of the fastest-growing OOH companies in the US, Firefly is redefining out-of-home advertising at scale, delivering high-performance solutions for brands, cities, and businesses worldwide.

• Series B
• 353 employees
• Founded 2017