69 Best Adtech Startups in London to Watch in 2025

The Definitive Seedtable Ranking of Adtech Startups in London

We track 71,000+ companies and rank them dynamically using our Seedtable Score – a score that uses quantitative and qualitative data points to signal the momentum behind a company. We then monitor the list manually leveraging our expertise as founders and investors.

There are 89 start-ups with an aggregate funding of $1.7b. The average funding per company in this subset is $24.3m.

Last update to the database: Feb 18, 2025. See changelog.

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7

Funding Rounds

$124.0m

Money raised

Company providing user behavioral analytics for revenue optimization for websites and smartphone applications

Location:

Key people:

4

Funding Rounds

$42.5m

Money raised

Vungle (Vungle, Inc.) is startup which powers video advertisements inside of mobile apps and games.

3

Funding Rounds

$107.0m

Money raised

Drift is a software company offering a conversational marketing platform founded in 2015 by David Cancel.

6

Funding Rounds

$16.4m

Money raised

Threedium creates brand experiences, drives product considerations, and delivers conversions through 3D/augmented reality technology.

Location:

Key people:

1

Funding Rounds

A company with a feedback platform for businesses in Europe. It was founded in 2012 and has locations in France and England.

7

Funding Rounds

$93.6m

Money raised

WeGift is a smart solution for distributing gift cards at scale. They stand out for providing access to 700+ brands, bulk discounts of up to 25% off, and the ability to reclaim unspent value on expired gift cards.

Location:

Key people:

3

Funding Rounds

$9.5m

Money raised

Talkwalker is a social media analytics and monitoring tool.

4

Funding Rounds

$47.2m

Money raised

Black Swan's SaaS solution uses data analytics to allow brands to more accurately predict future consumer trends.

Location:

Key people:

1

Funding Rounds

$161.7k

Money raised

Avocarrot is a company powered by Glipsa Global Group with a specialization in a monetization platform for app developers. Its headquarters are in Athens, Greece and it was founded in 2013.

Location:

Key people:

4

Funding Rounds

$34.5m

Money raised

Provider of AI-driven audio advertising solutions for applications and games.

Industries:

Location:

Key people:

5

Funding Rounds

$223.1m

Money raised

Smartling is a company founded in 2009 by Jack Welde.

1

Funding Rounds

$5.8m

Money raised

Snatch is an AR Gaming Experience.

Location:

Key people:

2

Funding Rounds

$9.0m

Money raised

Spirable is a company founded in 2014 by Ger O'Meara.

2

Funding Rounds

$1.5m

Money raised

Kantox is a leader in Currency Management Automation software that enables businesses to automate their end-to-end FX workflow

Location:

Key people:

5

Funding Rounds

$88.6m

Money raised

Customer data and marketing platform helps retailers increase CRM revenue with personalized messages.

5

Funding Rounds

$165.1m

Money raised

InfoSum provides a decentralized platform designed to remove the trust barriers between progress and privacy.

Location:

Key people:

3

Funding Rounds

$57.0m

Money raised

Mention Me is a London-based company founded in 2013 by Andy Cockburn.

Location:

Key people:

3

Funding Rounds

$7.8m

Money raised

Marketplace connecting ski instructors with people learning to ski.

7

Funding Rounds

$49.6m

Money raised

Ziflow is a software as a service company.

Location:

Key people:

6

Funding Rounds

$67.6m

Money raised

Admix is an in-game advertising platform founded in 2017 by Samuel Huber.

3

Funding Rounds

$18.2m

Money raised

Ad-Lib provides a SaaS based platform that connects creative and media workflows using AI that makes it easy to produce and optimize relevant ad creatives across all digital channels.

2

Funding Rounds

$10.0m

Money raised

Relative Insight is a company founded in 2012 by Phil Greenwood.

Key people:

4

Funding Rounds

$37.0m

Money raised

MyThings is a London-based developer of conversion-drive personalized display advertising solutions for online retailers.

Location:

Key people:

3

Funding Rounds

$2.6m

Money raised

AdTonos is a full-stack digital audio advertising platform founded in 1998 by Michal Marcinik.

3

Funding Rounds

$11.1m

Money raised

Podcast publishing solutions for both enterprises and consumer

1

Funding Rounds

$750.0k

Money raised

Goody is a company founded in 2014.

2

Funding Rounds

$33.5m

Money raised

Creative platform that powers mobile video ad creation for brands.

Location:

Key people:

5

Funding Rounds

$44.1m

Money raised

Measuring Human Response At The Speed & Scale Of AI

1

Funding Rounds

$17.0m

Money raised

SaaS platform that helps businesses create and personalize interactive content on a large scale.

$11.0m

Money raised

Platform for embedding ads within video game environments.

Location:

Key people:

1

Funding Rounds

$2.0m

Money raised

Advertising platform for streaming gamers and brands.

Location:

Key people:

2

Funding Rounds

$1.9m

Money raised

Brainient is a company founded in 2009 by Emi Gal.

Industries:

Key people:

3

Funding Rounds

$8.0m

Money raised

Dragonfly AI provides a brain simulation analytics platform.

Location:

Key people:

3

Funding Rounds

$13.8m

Money raised

Platform that turns advertising revenue into charitable donations, achieving higher engagement for advertisers.

Location:

Key people:

3

Funding Rounds

$27.5m

Money raised

LoopMe is an artificial Intelligence company founded in 2012.

1

Funding Rounds

$360.2k

Money raised

Mopapp is a London-based company founded in 2002 by Alessandro Rizzoli, Marco Bellinaso and Federico Sita.

2

Funding Rounds

$10.1m

Money raised

Enterprise-grade video streaming solution for companies looking to stream copy-protected content to millions of users

Location:

Key people:

2

Funding Rounds

$30.0m

Money raised

WeAre8 is a content sharing platform that assists brands to engage and manage influencers and customer relationships at scale.

Location:

Key people:

2

Funding Rounds

$22.5m

Money raised

Threads is a London-based company founded in 2017 by Nirvek Bhati.

Location:

Key people:

6

Funding Rounds

$20.2m

Money raised

Adludio is a mobile sensory advertising founded in 2015.

3

Funding Rounds

$22.6m

Money raised

Platform enabling research through executive and SME consultations and surveys globally.

2

Funding Rounds

$20.0m

Money raised

Platform that connects customers with qualified experts to solve customer service inquiries on-demand.

1

Funding Rounds

$1.1m

Money raised

Predictive marketing technology that significantly enhances the effectiveness of acquiring new and repeat customers.

3

Funding Rounds

$7.4m

Money raised

Platform for optimizing eCommerce and advertising on Amazon.

Location:

1

Funding Rounds

$24.0m

Money raised

HyperJar is a money management app founded in 2018 by Mike Janzen.

Location:

Key people:

1

Funding Rounds

Smartzer is a provider of an interactive and shoppable video platform.

1

Funding Rounds

$646.1k

Money raised

WalkABit is a company founded in 2018 by Michał Zieliński.

Key people:

1

Funding Rounds

Tamoco combines accuracy, consent and scale to form the world's smartest geospatial data network.

1

Funding Rounds

$5.4m

Money raised

A global marketplace enabling creators to monetise their brand. No risk. No waste.

Location:

2

Funding Rounds

$22.3m

Money raised

Kyra is a global Creator Economy Company founded in 2017.

Location:

1

Funding Rounds

$47.0m

Money raised

Teads NV is a cloud-based, end-to-end technology platform that enables programmatic digital advertising for a global, curated ecosystem of quality advertisers and agencies and quality publishers.

1

Funding Rounds

$2.2m

Money raised

Poplar Studio is a London-based company offering 3D and AR previews of products for e-commerce websites, social commerce, and the metaverse.

Location:

Key people:

1

Funding Rounds

$900.0k

Money raised

Platform that enhances fitness, fosters social connections, and adds fun by organizing interactive games.

Location:

1

Funding Rounds

Secco is a blockchain company founded in 2015 by Chris Gledhill.

Location:

Key people:

1

Funding Rounds

Influencer is a London-based company founded in 2015.

1

Funding Rounds

$2.8m

Money raised

Platform for developing cutting-edge digital media products informed by the latest tech trends.

1

Funding Rounds

$227.8k

Money raised

OVIVO Mobile Communications is a London-based company founded by Dariush Zand.

Location:

Key people:

Cutting-edge mobile app plug-in that allows companies to hyper-focus their marketing efforts with geo-triggered customer engagement tools.

Industries:

Location:

1

Funding Rounds

$700.0k

Money raised

Captive Media is a London-based company founded in 2007.

1

Funding Rounds

$4.0m

Money raised

Takumi is a japanese name founded in 2015 by Mats Stigzelius.

1

Funding Rounds

$378.4k

Money raised

Admedo is a London-based company.

1

Funding Rounds

$4.6m

Money raised

Buyapowa lets brands identify the customers who already love them.

1

Funding Rounds

$3.4m

Money raised

Abacus is an award-winning Software as a Service (SaaS) provider with unique proprietary Customer Data Platform (CDP) and Digital eXperience Platform (DXP) offerings. We help brands and communities improve revenue and engagement with personalised digital experiences and offers.

1

Funding Rounds

$11.6m

Money raised

Ocean Outdoor is a company founded in 2007.

1

Funding Rounds

$2.5m

Money raised

A single programmatic platform that enables advertisers to create, activate, measure and optimise brilliant brand campaigns at scale.

1

Funding Rounds

$130.0k

Money raised

Creative agency offering content creation, digital campaigns, animation, and brand planning services.

1

Funding Rounds

We help the world's leading organisations stay ahead of the game through audience collaboration.

1

Funding Rounds

$11.0m

Money raised

Platform for influencers to own their audience and create personal brands.

Location:

1

Funding Rounds

$7.0m

Money raised

Ink is a London-based advertising company founded in 1994.

Industries:

Location:

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