Top California AdTech Startups (511)

Attain is the most trusted and comprehensive source for permissioned, real-time purchase data in the United States. By connecting directly with over 10 million consumers, Attain delivers unmatched accuracy and scale across audience activation, insights, and in-flight optimization, and measurement, helping marketers tie every dollar of media to real-world sales outcomes. Attain’s portfolio of owned and operated apps, spanning financial...

ClickMint pairs proprietary generative-AI diagnostics with senior CRO operators to uncover friction, launch precision tests, and unlock compounding gains—helping high-growth e-commerce brands scale faster without buying more traffic. Founded by the creator of one of the nation’s top-performing digital marketing firms—honored by Inc. as a Fastest-Growing Company for seven consecutive years and ranked among the Top 50 U.S. marketing agencies...

Lemonlight launched in 2014 with a mission to make marketing videos accessible to small/midsize businesses in a market that catered to large brands. Since then, we’ve become one the largest branded content providers in the world! We’ve worked with over 3,500 brands and are now serving a range of clientele from small businesses to the world’s biggest brands like Amazon,...

New Honor Society (San Francisco | Chicago | Saint Louis) is an award-winning creative boutique that has helped clients like Microsoft, Logitech, Heluva Good and Nestlé Dreyer's/Edy's create greater engagement and advocacy by behaving more like "people."​ As an FCB Company, New Honor Society has the creative fire of a start-up, with the resource depth of a global network. Join...

MAI was founded by technologists and operators who spent over a decade building ad platforms and e-commerce engines. They saw that growth-stage businesses often lacked access to the advanced growth technology powering the largest platforms, and set out to change that. Today, a rapidly growing network of D2C brands and apps rely on MAI’s intelligent agents to simplify marketing complexity, uncover...

Maricich Health is a branding, advertising and marketing communications agency. We help integrated healthcare organizations and others build market share by developing inspired campaigns that positively influence the way consumers and stakeholders make decisions about healthcare. By transforming strategies into creative ideas that further organizational and population health goals, we deliver healthy marketing outcomes for leading hospitals, health systems, payers,...

Exverus Media is Adweek's Breakthrough Media Agency of the Year & 3x AdAge Small Media Agency of the Year. We empower global, growth-stage brands with cutting-edge data, creativity, and insight-driven media planning from our headquarters in Los Angeles and team based throughout the U.S. Named for the Latin phrase "from the truth", Exverus distinguishes itself through dedication to transparency and...

NeoReach’s mission is to empower Creators by transforming their influence into sustainable income streams. We are committed to elevating their passion into a thriving profession, leveraging their unique storytelling abilities and diverse audiences to craft engaging and authentic brand narratives that resonate on a global scale. Our approach is both tech-enabled and human-focused, seamlessly integrating cutting-edge technology with a deep understanding...

Human Agency is building a world where the most powerful tools of media and technology can and should be used to advance the values and goals of people. Digital advertising today is profit-centered, more complex than it needs to be, and is currently monopolised by those who have existing knowledge, tools and resources. We are changing this by building a...

Founded in 2007, Wild Card is an independent agency created with the goal of building a community of highly-talented, creative people who are passionate about film, TV, music, gaming and advertising. We bring a myriad of talents and passions together to create meaningful, groundbreaking campaigns for our clients and audiences everywhere. Worldbuilding is the driving force behind everything we do. We...

LA is a full-service creative advertising agency that combines 360º brand-building expertise with a nuanced understanding of regional and global perspectives. We create advertising in every discipline — print, A/V, social, motion graphics and content production — for all media, including theatrical, streaming, television, games, stage and music. Since opening in 2015, we have established ourselves as an industry leader,...

Brilliant brings brands to life with impactful, creative branded merchandise and an industry-leading suite of tech-based tools and services. With a focus on creativity and technology, Brilliant curates, produces, and helps companies distribute memorable branded merchandise and custom products. We create newsworthy press kits, welcome gifts for new hires, merch sets to promote a product launch, giveaways people love and...

Seismic delivers the best campaigns. Influencer marketing provides huge potential, but can have lots of friction and failure points. By combining institutional knowledge with data science and proprietary technology Seismic delivers performance-driven influencer marketing campaigns that work seamlessly for brands, creators, and audiences alike.

Today, every little thing a brand does matters. How they look, things they say, and mostly, what they do. There’s no hiding. No faking. Just reality. So why not keep it real with what really matters? We help brands look inward to find their truth, live it with their every move, and share it with employees and fans. The result?...

At PeopleFinders, we turn information into actionable insights, empowering trust and safety in today’s digital world. PeopleFinders and our affiliated brands are trusted providers of public records searches and analytical data, offering unparalleled insights. At our core, we’re committed to finding, organizing, and making the right information accessible. Founded in 1999, the PeopleFinders team of innovators is dedicated to helping...

Koneo Mobile: Trusted. Unique. Innovative. Enhancing mobile advertising with better technology, transparent results and innovative approaches. Koneo Mobile is a mobile user acquisition technology company. We are a passionate, innovative and trusted group of mobile marketers working to build a better, more transparent and more streamlined performance-based marketing experience. Koneo’s unique insights and methods along with its proprietary performance distribution platform enables...

Iron Horse specializes in creating demand for the technologies that are transforming the world. We're dataheads, creative thinkers, and demand gen experts with a collective passion for connecting the dots between marketing efforts and results. We work together in cross-functional teams to develop unique, data-driven programs that cultivate long-lasting relationships and drive growth. Based in San Ramon, CA and Portland, OR,...

Genex is a full-service interactive agency offering web, mobile and social strategy, creative, design and development. Genex is ranked as one of the top 50 interactive agencies by AdWeek and Ad Age magazines. Clients include: Acura, Nestle, ING, Cessna, Ford, KB Home, Allergan, Lowes. Genex is a wholly owned subsidiary of Meredith Corporation

Fueled by Creativity, Driven by Results. For more than 17 years, PETROL has been creating rocket fuel for brands on a global scale. PETROL specializes in the youth-driven, 18-45 demographic, and has pioneered the iconic visuals & marketing strategies that make the target market want for more. PETROL is constantly developing fully integrated global marketing campaigns for major brands across...

Wonderist Agency is a full-service marketing agency for dental practices to help them grow their new patient base through a personalized, results-focused marketing plan. We pride ourselves on our personalized approach to each of our client's needs and are committed to working as part of your existing team. Our Services Account Management: Are you tired of managing lots of marketing partners and...