December 26, 2025

15 Fastest Growing AdTech Companies and Startups

Discover the 15 fastest-growing AdTech companies and startups of 2025 that are driving the industry toward a projected $1.22 trillion valuation through AI innovation and privacy-first solutions.
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Table of Contents

Major Takeaways

How fast is the AdTech industry growing?
The industry reached $876 billion in 2024 and is projected to hit $1.22 trillion by 2033 due to AI adoption and mobile advertising surges.
What are the primary drivers of this market expansion?
Mobile gaming, Connected TV advertising, and the creator economy are fueling expansion alongside privacy-compliant first-party data solutions.
Why is AI critical for AdTech success in 2025?
AI improves targeting accuracy by up to 50% and enables agentic GTM strategies that identify high-intent buyers using natural language prompts.

The AdTech industry reached $876 billion in 2024 and is racing toward $1.22 trillion by 2033 according to IMARC Group, but which companies are capturing this explosive growth? From AI-powered programmatic platforms to privacy-first solutions, 2025's fastest-growing AdTech companies are redefining digital advertising. For these innovators, finding and qualifying the right prospects is just as critical as building cutting-edge technology. That's where agentic AI platforms like Landbase come in—helping AdTech companies accelerate their go-to-market by identifying high-intent buyers using natural-language prompts instead of complex database queries.

Key Takeaways

  • AdTech market is scaling rapidly – The AdTech industry reached $876 billion in 2024 and is projected to hit $1.22 trillion by 2033 according to IMARC Group, driven by AI adoption, mobile advertising surge, and programmatic buying dominance.
  • Mobile and CTV advertising lead growth – AppLovin's $100+ billion market cap and Magnite's $776M revenue demonstrate the massive opportunity in mobile gaming and Connected TV advertising.
  • Privacy and first-party data solutions are essential – As third-party cookies fade, companies like Kevel, Permutive, and Brave are thriving with privacy-compliant, first-party data approaches that give companies ownership of their AdTech stacks.
  • Brand safety and verification remain critical – DoubleVerify processed over 8 trillion media transactions in 2024, highlighting the ongoing need for fraud detection and brand safety in digital advertising.
  • Creator economy drives new AdTech models – ShopMy's $70M Series C in October 2024 shows how creator-first commerce platforms are creating entirely new advertising paradigms.
  • AI-powered targeting is table stakes – Companies achieving up to 50% improvement in targeting through AI are outpacing competitors, making agentic AI essential for modern AdTech go-to-market strategies.
  • Programmatic advertising dominates80% of US display ads now run through programmatic channels, with The Trade Desk processing 15 million ad impressions per second.

1. AppLovin — Mobile AdTech Platform Leader

What They Do:

AppLovin is an AI-powered mobile advertising platform with advanced machine learning optimization that originally focused on mobile gaming but has expanded to e-commerce and cross-channel advertising. The platform enables real-time ad placement optimization, enhancing targeting accuracy for mobile advertisers across 74 countries.

Why They're Important:

AppLovin operates as an AI-powered mobile advertising platform with advanced ML optimization, serving 6,600+ mobile businesses globally. Originally focused on mobile gaming, the company has expanded to e-commerce and cross-channel advertising with real-time ad placement optimization that enhances targeting accuracy.

Key Stats / Metrics:

Leadership:

  • CEO: Adam Foroughi
  • Founded: 2012

Recent Funding:

  • Most Recent Round: $3.55B Post-IPO Debt (November 2024)
  • Total Funding: $5.12B
  • Key Investors: Kohlberg Kravis Roberts, Streamlined, Employee Stock Option Fund

2. ShopMy — Creator Commerce & Influencer Marketing Platform

What They Do:

ShopMy is a creator-first commerce platform that connects influencers with brands, operating at the intersection of the booming creator economy and e-commerce. The platform enables authentic product recommendations and seamless purchasing experiences, with major brand partnerships including Dunkin Donuts, Dominoes, Amazon, and Uber Eats.

Why They're Important:

As a creator-first commerce platform connecting influencers with brands, ShopMy operates in the high-growth creator economy space with major brand partnerships that demonstrate strong market validation. The company's extremely recent funding shows strong investor confidence in the creator commerce model.

Key Stats / Metrics:

  • #1 overall in GFD Tech100 ranking with a score of 81.8
  • 61K branded search volume with +4K monthly growth
  • $175 million total funding raised 

Leadership:

  • Founders: Harry Rein
  • Founded: 2020

Recent Funding:

  • Most Recent Round: $70M Series C (October 2024)
  • Total Funding: $175M
  • Key Investors: Menlo Ventures, Bessemer Venture Partners, Bain Capital Ventures, Inspired Capital Partners, AlleyCorp

3. Klaviyo — Marketing Automation & Email Marketing Platform

What They Do:

Klaviyo provides comprehensive marketing automation for e-commerce with strong email and SMS capabilities, helping brands build personalized customer journeys. The platform integrates with major e-commerce platforms to deliver targeted messaging based on customer behavior and purchase history.

Why They're Important:

Klaviyo offers comprehensive marketing automation for e-commerce with strong email/SMS capabilities and strong brand recognition in the e-commerce marketing space. Large total funding demonstrates sustained investor confidence, while recent 2025 funding shows continued growth trajectory.

Key Stats / Metrics:

  • #3 overall in GFD Tech100 ranking with a score of 80.1
  • 301K branded search volume with +2K monthly growth
  • 79.7 website score indicating strong digital presence

Leadership:

  • CEO: Andrew Bialecki
  • Founded: 2012

Recent Funding:

  • Most Recent Round: $195M (August 2025)
  • Total Funding: $1.35B

4. The Trade Desk — Demand-Side Platform (DSP) Leader

What They Do:

The Trade Desk is the largest independent demand-side platform (DSP) with AI-powered programmatic advertising at scale, providing advertisers with full control and transparency in programmatic campaigns. The platform processes 15 million impressions per second and enables real-time bidding with advanced AI for better ROI.

Why They're Important:

The Trade Desk is the largest independent DSP with AI-powered programmatic advertising at scale, providing full advertiser control and transparency in programmatic campaigns. As a dominant force in programmatic advertising used by 56% of marketers, the platform offers real-time bidding with advanced AI for better ROI.

Key Stats / Metrics:

Leadership:

  • Founder & CEO: Jeff Green
  • Founded: 2009

Recent Funding:

  • Most Recent Round: $125M Conventional Debt (May 2016)
  • Total Funding: $82.5M

5. Agentio — AI-Powered Advertising Platform

What They Do:

Agentio is an AI-powered advertising platform that leverages cutting-edge artificial intelligence to optimize ad campaigns and targeting. The platform represents the next generation of AI applications in advertising, with a focus on automated campaign optimization and performance improvement.

Why They're Important:

With the highest funding score (79.3) in the entire Green Flag Digital ranking and most recent funding of all companies (just 13 days old as of report date), Agentio represents rapid acceleration in AI-powered advertising. The $40M funding represents 71% of total capital and is backed by top-tier VCs including Benchmark and Craft Ventures.

Key Stats / Metrics:

  • #1 funding score of 79.3
  • $56 million total funding raised 
  • $40 million most recent funding 

Leadership:

  • Founders: Arthur Leopold
  • Founded: 2023 

Recent Funding:

  • Most Recent Round: $40M Series B (November 2025)
  • Total Funding: $56M
  • Key Investors: Antler, Craft Ventures, Benchmark, Forerunner, AlleyCorp

6. Magnite — Supply-Side Platform (SSP) Leader

What They Do:

Magnite is the world's largest independent sell-side advertising platform, specializing in Connected TV (CTV) advertising—the fastest-growing ad channel. The platform provides omnichannel monetization across web, mobile, and CTV for publishers and media companies.

Why They're Important:

As the world's largest independent sell-side advertising platform, Magnite specializes in Connected TV advertising, the fastest-growing ad channel. The platform provides omnichannel monetization across web, mobile, and CTV, making it well-positioned for CTV ad spend growth.

Key Stats / Metrics:

Leadership:

  • CEO: Michael Barrett 
  • Founded: 2007 

Recent Funding:

  • Most Recent Round: $350M Post IPO (March 2021)
  • Total Funding: $37M 

7. Prizeout — AdTech-FinTech Platform

What They Do:

Prizeout is an innovative AdTech-FinTech platform that transforms cash withdrawals into digital gift cards with added value, bridging e-commerce, advertising, and payment technologies uniquely. The platform provides a unique way for brands to reach customers while enhancing user purchasing power through major partnerships with Dunkin Donuts, Dominoes, Amazon, and Uber Eats.

Why They're Important:

With an innovative model transforming cash withdrawals into digital gift cards with added value, Prizeout bridges e-commerce, advertising, and payment technologies uniquely. Major brand partnerships demonstrate market validation, while corporate funding of $37.5M shows strategic investor confidence in this reward-based advertising innovation.

Key Stats / Metrics:

  • 8,500% search growth over 5 years indicates explosive market interest
  • $37.5M corporate funding round 

Leadership:

  • CEO: David Metz
  • Founded: 2019

Recent Funding:

  • Most Recent Round: $37.5M Corporate Round
  • Total Funding: $37.5M
  • Key Investors: RiverPark Ventures, Anchor Capital GP

8. VidMob — Creative Intelligence & Video Ad Platform

What They Do:

VidMob is a creative intelligence platform with analytics, automation, and scoring capabilities that focuses on video advertising and creative optimization. The platform serves notable clients including Audi, Meta, and Burger King, with a unique focus on helping nonprofits and under-resourced organizations access premium creative tools.

Why They're Important:

As a creative intelligence platform with analytics, automation, and scoring capabilities, VidMob focuses on nonprofits and under-resourced organizations alongside notable clients like Audi, Meta, and Burger King. Continued funding through 2025 shows sustained momentum in creative optimization.

Key Stats / Metrics:

Leadership:

  • CEO: Alex Collmer
  • Founded: 2015

Recent Funding:

  • Most Recent Round: $8M Series D (April 2025)
  • Total Funding: $210M
  • Key Investors: ID Fund, PROOF Fund

9. Integral Ad Science (IAS) — Ad Verification & Brand Safety Leader

What They Do:

Integral Ad Science (IAS) is a global leader in digital media quality and brand safety, providing AI-powered fraud detection and contextual targeting solutions. The platform measures and verifies digital ad quality to ensure brand-safe, viewable, and fraud-free ad delivery across all channels.

Why They're Important:

IAS is a global leader in digital media quality and brand safety with AI-powered fraud detection and contextual targeting, serving as critical infrastructure for brand safety in digital advertising. Premium product upsells like Authentic Brand Suitability are driving revenue growth.

Key Stats / Metrics:

  • 8+ trillion transactions measured in 2024
  • $657M revenue in 2024 with +15% growth
  • $755M revenue guidance for 2025
  • 32% EBITDA growth projected for 2025

Leadership:

  • CEO: Lisa Utzschneider
  • Founded: 2009

Recent Funding:

  • Most Recent Round: $30M (June 2025)
  • Total Funding: $301M

10. Kevel — AdTech API & Custom Ad Platform Development

What They Do:

Kevel provides a developer-first API approach enabling companies to create custom ad platforms and own their AdTech stack rather than relying on third parties. The platform offers modular ad solutions addressing privacy regulation needs and giving companies full control over their advertising technology.

Why They're Important:

With a developer-first API approach enabling custom ad platform creation, Kevel allows companies to own their AdTech stack rather than relying on third parties. Modular ad solutions address critical privacy/ownership needs as regulations tighten and privacy concerns grow.

Key Stats / Metrics:

Leadership:

  • CEO: James Avery
  • Founded: 2010

Recent Funding:

  • Most Recent Round: $23M Series C (March 2025)
  • Total Funding: $45.2M
  • Key Investors: Fulcrum Equity Partners, Commerce Ventures

11. Permutive — Privacy-Safe Data Management Platform

What They Do:

Permutive provides privacy-safe infrastructure with Edge technology for real-time audience reach, emphasizing first-party data that removes the need for individual identification. The platform enables publishers to plan, build, and activate cohorts safely while complying with increasingly strict privacy regulations.

Why They're Important:

With privacy-safe infrastructure using Edge technology for real-time audience reach, Permutive's first-party data emphasis removes the need for individual identification. The platform addresses critical privacy/first-party data needs as third-party cookies fade, enabling publishers to plan, build, and activate cohorts safely.

Key Stats / Metrics:

  • $116M total funding
  • $86.5M most recent funding
  • Ranked 10th among 334 active competitors 

Leadership:

  • CEO: Joe Root
  • Founded: 2014

Recent Funding:

  • Most Recent Round: $86.5M Series C (October 2021)
  • Total Funding: $116M

12. Brave — Privacy-First Web Browser & Ad Platform

What They Do:

Brave is a privacy-first web browser that blocks ads and trackers by default, with users opting into privacy-respecting ads. The platform features a revenue share model that gives creators more ad revenue compared to traditional platforms, fundamentally disrupting the digital advertising model.

Why They're Important:

Brave blocks ads/trackers by default while users opt-in to privacy-respecting ads, addressing growing privacy concerns in digital advertising. Founded by JavaScript creator Brendan Eich, the platform's revenue share model gives creators more ad revenue versus traditional platforms.

Key Stats / Metrics:

Leadership:

  • CEO: Brendan Eich
  • Founded: 2015

Recent Funding:

  • Most Recent Round: $4.5M Seed (August 2016)
  • Total Funding: $7M
  • Key Investors: Foundation Capital, Digital Finance Group

13. DoubleVerify — Digital Media Quality & Ad Verification

What They Do:

DoubleVerify provides comprehensive ad verification ensuring brand-safe, viewable, and fraud-free ad delivery through AI-powered fraud detection and visibility analysis. The platform serves as critical infrastructure for digital media quality, working alongside competitors like Integral Ad Science to maintain trust in digital advertising.

Why They're Important:

DoubleVerify offers comprehensive ad verification ensuring brand-safe, viewable, fraud-free delivery with AI-powered fraud detection and visibility analysis. As a public company with substantial funding history, it plays a critical verification/quality role in the AdTech ecosystem.

Key Stats / Metrics:

Leadership:

  • CEO: Mark Zagorski
  • Founded: 2008

Recent Funding:

  • Most Recent Round: $350M Series D (October 2020) 
  • Total Funding: $396M

14. Scalarr — Mobile Ad Fraud Detection

What They Do:

Scalarr is a machine learning platform for mobile ad fraud detection with three core products: track performance, autoblock fraud, and identify opportunities. The platform claims to detect 60%+ more fraud than competitors and provides security solutions for Edge, IoT/OT, and mobile environments.

Why They're Important:

As a machine learning platform for mobile ad fraud detection, Scalarr offers three core products: track performance, autoblock fraud, and identify opportunities. The platform addresses the critical ad fraud problem in the $100B+ annual fraud market with security solutions for Edge, IoT/OT, and mobile environments.

Key Stats / Metrics:

Leadership:

  • CEO: Inna Ushakova
  • Founded: 2016

Recent Funding:

  • Most Recent Round: $7.5M Series A (February 2021)
  • Total Funding: $9M
  • Key Investors: OTB Ventures, TMT Investments

15. Cosmose AI — Offline-to-Online Attribution & AI Commerce

What They Do:

Cosmose AI integrates offline and online channels for e-commerce through AI-powered attribution, capturing offline customer behavior to inform online advertising. The platform requires no hardware or installation for retail shops and can track location with accuracy within 2 meters, bridging the gap between physical and digital retail.

Why They're Important:

With AI integration of offline and online channels for e-commerce, Cosmose AI captures offline customer behavior to inform online advertising with no hardware/installation required for retail shops. The platform addresses a critical gap in attribution/measurement for omnichannel retail with Asia-Pacific positioning in a high-growth market.

Key Stats / Metrics:

  • $27M total funding raised 
  • $500M current valuation
  • Ranked 5th among 13 active competitors 

Leadership:

  • CEO: Miron Mironiuk
  • Founded: 2014

Recent Funding:

  • Most Recent Round: Undisclosed, Series B (April 2023)
  • Total Funding: $27M 

Market Overview: Why These AdTech Companies Matter

These 15 fastest-growing AdTech companies represent the cutting edge of digital advertising innovation, from AI-powered targeting and programmatic buying to privacy-compliant data solutions and fraud detection. As the industry scales toward $1.22 trillion by 2033 according to IMARC Group, these companies are solving critical challenges:

  • Privacy and compliance as third-party cookies fade
  • Brand safety and fraud prevention in an increasingly complex digital landscape
  • Mobile and CTV advertising optimization for the fastest-growing channels
  • Creator economy integration for authentic brand partnerships
  • First-party data ownership giving companies control over their AdTech stacks

For these innovators, go-to-market success depends on finding and qualifying the right prospects quickly. This is where agentic AI for GTM becomes essential—enabling AdTech companies to identify high-intent buyers using natural language instead of complex database queries.

How We Chose These Fastest-Growing AdTech Companies

This list highlights companies that demonstrate exceptional growth and innovation based on:

  • Recent funding momentum – All companies raised significant capital in 2024-2025, with ShopMy's $70M in October 2024 and Agentio's $40M in November 2025 showing the hottest current momentum
  • Market impact and scale – From AppLovin's $100+ billion valuation to IAS's 8+ trillion transactions measured in 2024
  • Innovation in critical areas – Privacy (Kevel, Permutive, Brave), fraud detection (Scalarr, IAS, DoubleVerify), and emerging channels (Magnite for CTV, Prizeout for AdTech-FinTech)
  • Data-driven validation – Using Green Flag Digital's proprietary Tech100 scoring system, search growth data from Exploding Topics, and comprehensive funding data from multiple sources

AI-Powered GTM: Essential for AdTech Success

These fastest-growing AdTech companies show how critical AI has become for product innovation. But having AI-rich products is only half the story. To capture market share in the competitive $876 billion AdTech industry, companies also need AI-powered go-to-market engines that can:

  • Identify the right prospects at the right time based on real-time signals
  • Prioritize accounts showing purchase intent through funding rounds, hiring, or tech stack changes
  • Feed high-quality audiences into CRM, marketing automation, and sales workflows

This is where platforms like the VibeGTM interface come in. Instead of manually assembling lists or writing complex filters, AdTech GTM teams can use agentic AI to interpret natural-language prompts like: "CMOs at AdTech companies with 50-200 employees that raised funding in the last 6 months." Landbase then returns AI-qualified audiences ready for immediate activation.

By combining company data—which includes 1,500+ unique signals across firmographic, technographic, intent, hiring, and funding data—with natural-language targeting, AdTech sales and marketing teams can:

  • Build targeted lists in seconds instead of days
  • Focus on high-intent prospects based on real-time market signals
  • Shorten sales cycles and increase engagement rates in a competitive market

For AdTech companies competing to capture their share of the $1.22 trillion market by 2033 according to IMARC Group, AI-powered GTM is no longer optional. It's the essential layer that connects innovative AdTech products to the right buyers at scale.

Frequently Asked Questions

What defines a fast-growing AdTech company in 2025?

Fast-growing AdTech companies in 2025 are characterized by significant recent funding, typically major rounds in 2024-2025, strong growth metrics like website traffic or search volume growth, and innovation in critical areas like privacy compliance, AI-powered targeting, or emerging advertising channels like CTV. Companies like Agentio with $40M raised in November 2025 and ShopMy with #1 ranking in composite growth scores exemplify this momentum. These companies demonstrate both substantial investor confidence and market validation through customer adoption and revenue growth.

How important is AI in modern AdTech platforms?

AI is now table stakes in AdTech, with companies achieving up to 50% improvement in targeting through AI-powered optimization. Leading platforms like AppLovin leverage machine learning for campaign efficiency and targeting precision, while fraud detection companies like Scalarr use AI to identify 60%+ more fraud than competitors. The integration of AI into core AdTech functionality is essential for competitive differentiation, enabling real-time bidding optimization, predictive analytics, and automated campaign management. Without AI capabilities, AdTech platforms increasingly struggle to compete on both performance and efficiency metrics.

What role does privacy compliance play in AdTech growth?

Privacy compliance has become a major growth driver for AdTech companies as third-party cookies fade and regulations tighten. Companies like Kevel, Permutive, and Brave are thriving by offering privacy-compliant, first-party data solutions that give companies ownership of their AdTech stacks. As Kevel's 75% search growth demonstrates, the market is rewarding platforms that address these critical privacy and ownership needs. Publishers and advertisers are actively seeking solutions that maintain targeting effectiveness while respecting user privacy and complying with GDPR, CCPA, and other emerging regulations.

How can AdTech companies accelerate their go-to-market strategies?

AdTech companies can accelerate go-to-market by leveraging natural language targeting to find high-intent prospects quickly. Instead of manually querying complex databases, teams can use agentic AI to identify prospects based on real-time signals like recent funding rounds, hiring activity, or tech stack changes. This approach dramatically reduces time-to-value and helps AdTech companies capture market share in the competitive $876 billion industry. AI-powered GTM platforms enable sales and marketing teams to build targeted lists in seconds, focus on high-intent accounts, and shorten sales cycles through better prospect qualification.

What are the biggest opportunities in AdTech for 2025-2026?

The biggest opportunities in AdTech include Connected TV advertising where Magnite generated $776M revenue in 2024, creator commerce as demonstrated by ShopMy's $70M Series C, and privacy-compliant data solutions. The industry's expansion toward $1.22 trillion by 2033 according to IMARC Group creates significant opportunities for companies solving critical challenges in these high-growth segments. Additional opportunities exist in AI-powered fraud detection, first-party data platforms, and omnichannel attribution solutions that bridge offline and online advertising.

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