69 Best Communications Startups in London to Watch in 2025

The Definitive Seedtable Ranking of Communications 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 107 start-ups with an aggregate funding of $6.6b. The average funding per company in this subset is $95.2m.

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

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2

Funding Rounds

$12.1m

Money raised

Sky and Space Global is an Australian nanosatellite company focused on IoT networks.

Location:

Key people:

8

Funding Rounds

$488.0m

Money raised

Outreach is a sales engagement platform that uses artificial intelligence (AI) for predictive analytics as it relates to sales.

4

Funding Rounds

$504.6m

Money raised

Infobip is a service provider for cloud-based mobile services.

2

Funding Rounds

$8.0m

Money raised

Crypto Quantique is a company that specializes in quantum cyber security.

Key people:

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

$5.0m

Money raised

VYZYO is a London-based provider of platforms and technologies for enabling and operating digital payment and mobile financial services for peer-to-peer and peer-to-business financial and messaging transactions.

Location:

Key people:

4

Funding Rounds

$11.2m

Money raised

Post-Quantum is a company that is developing quantum-resistant encryption for protection against code-breaking quantum computers and quantum-resistant signature schemes for secure blockchain deployment.

5

Funding Rounds

$383.0m

Money raised

OpenWeb, previously known as Spot.IM, is a conversation platform intended for publishers to start meaningful user discussions.

3

Funding Rounds

$4.7m

Money raised

Crypta Labs is quantum security startup that is developing a quantum-based encryption chip and software to secure the Internet of Things. The company developed a Quantum Random Number Generator (QRNG) for mobile devices and an integrated security chip for others. The company is targeting transport, military and medical markets.

Key people:

8

Funding Rounds

$373.3m

Money raised

Quantexa is a company that enables institutions to make better decisions using their data.

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.

3

Funding Rounds

$34.7m

Money raised

SenSat is a company providing data ingestion and data-based simulations to visualize and track infrastructure projects.

1

Funding Rounds

$15.0m

Money raised

Converge is a UK-based company developing real-time concrete monitoring solutions founded in 2014 by Raphael Scheps.

Key people:

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:

2

Funding Rounds

ArQit is working to provide the world's first global quantum encryption SaaS Business. They will use QKD technology to create unique keys that can be shared between two parties using laser transmissions from a satellite. The company is based in London, England and was founded in 2017.

5

Funding Rounds

$201.1m

Money raised

Cognism is a B2B sales acceleration software company that provides a marketing and sales acceleration solution.

Location:

Key people:

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:

3

Funding Rounds

$9.5m

Money raised

A company that participated in the W17 cohort of Y Combinator. It offers data-driven communication platform for bulk shipping, fleet and deal management for operators and brokers

Key people:

2

Funding Rounds

$33.5m

Money raised

Platform for recording, transcribing, and analyzing calls and meetings in real-time to capture important data points.

3

Funding Rounds

$5.3m

Money raised

Phrasee is a London-based developer of artificially intelligence copywriting tools for corporations and marketing teams.

2

Funding Rounds

$457.0m

Money raised

Netomnia Limited is a full-fibre network expansion driven by strategic investments founded in 2019.

5

Funding Rounds

$376.8m

Money raised

Pollinate is a cloud-based platform focused on merchant-acquiring for banks founded in 2017 by Alastair Lukies, Tim Joslyn, Jonathan Hughes and Fiona Roach Canning.

4

Funding Rounds

$896.4m

Money raised

Hopin is a online events platform where people can create engaging online events that connect people around the globe.

5

Funding Rounds

$95.1m

Money raised

Attest is a company founded in 2015 by Jeremy King.

Key people:

5

Funding Rounds

$159.0m

Money raised

Digital infrastructure layer platform to build realtime API tools.

5

Funding Rounds

$36.5m

Money raised

Adthena is a company founded in 2012 by Ian O’Rourke.

Key people:

2

Funding Rounds

$10.1m

Money raised

Antavo is a loyalty Management Platform for Fashion and Retail founded in 2012 by Andras Bencsik, Zsuzsa Kecsmar, Attila Kecsmar and Gábor Csarnai.

Location:

Key people:

5

Funding Rounds

$88.6m

Money raised

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

1

Funding Rounds

$5.2m

Money raised

DataSine is an artificial Intelligence / Machine Learning company founded in 2015 by Igor Volzhanin.

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

$15.5m

Money raised

Muso is a London-based cybersecurity company providing solutions for enterprises.

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

$80.3m

Money raised

YOOBIC provides a digital workplace for frontline teams.

1

Funding Rounds

$8.0m

Money raised

OpenSignal is a company that specializes in wireless coverage mapping founded in 2010 by Sina Khanifar, Sam Westwood, Brendan Gill and James Robinson.

Location:

Key people:

8

Funding Rounds

$134.6m

Money raised

floLIVE is a London-based provider of secure and cloud-native connectivity solutions for enterprises and mobile telecommunication operators.

7

Funding Rounds

$49.6m

Money raised

Ziflow is a software as a service company.

Location:

Key people:

1

Funding Rounds

$3.0m

Money raised

PeerIndex is a London-based company founded in 2009.

6

Funding Rounds

$22.0m

Money raised

Abiquo is a company founded in 2006 by Diego Mariño.

2

Funding Rounds

$9.1m

Money raised

Developer of a website building and editing software designed to give people and businesses a successful online presence. The company's software offers documentation and marketing tools that integrate seamlessly with existing products, and works well with account and billing systems, enabling businesses to grow their brands.

Location:

Key people:

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.

1

Funding Rounds

$131.2m

Money raised

FINBOURNE Technology is an investment data management platform founded in 2016 by Thomas Mchugh.

Location:

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:

1

Funding Rounds

$2.7m

Money raised

Conversion modelling platform designed for cookie-less marketing analytics.

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

$42.0m

Money raised

SuperAwesome is a London-based company founded in 2013 by Tom Impallomeni.

1

Funding Rounds

$17.0m

Money raised

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

3

Funding Rounds

$975.0m

Money raised

Hopin is a virtual event management software platform for managing events and experiences.

1

Funding Rounds

Datatonic drives business impact through innovative cloud engineering, analytics and AI.

Location:

Key people:

2

Funding Rounds

$9.7m

Money raised

Chargifi is a company founded in 2013 by Dan Bladen.

Location:

Key people:

1

Funding Rounds

Developing the infrastructure for a global digital marketplace for assets enveloped in company shells.

2

Funding Rounds

$5.0m

Money raised

Babble is a London-based company founded in 2001.

Location:

1

Funding Rounds

$4.9m

Money raised

Award-winning hybrid and virtual event platform for meetings of any size

3

Funding Rounds

$25.5m

Money raised

Telit is a London-based company founded in 2000 by John Keever.

Location:

Key people:

1

Funding Rounds

$93.6m

Money raised

Natterbox exists to push the boundaries of customer experience. As the fastest-growing Salesforce voice solution for successful sales and contact center teams, Natterbox provides industry-leading cloud-based voice technology that has enabled 1000s of businesses worldwide to transform their voice communication and the way they interact with customers. Today's innovative, global businesses like Alo Yoga, Berkshire Hathaway Group, TGI Fridays and Virgin Wines rely on Natterbox to make data-driven decisions and deliver outstanding customer service.

Location:

Key people:

1

Funding Rounds

Arkessa Limited is a company founded in 2009 by Andrew Orrock.

Key people:

1

Funding Rounds

$8.5m

Money raised

Weengs provides all the logistics services people need to build and grow their e-commerce businesses.

Location:

Key people:

3

Funding Rounds

$73.0m

Money raised

Impartner is a company founded in 1997 by Craig Flynn.

2

Funding Rounds

$4.6m

Money raised

Ori is an edge computing platform integrated across cloud infrastructure.

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:

4

Funding Rounds

$15.5m

Money raised

Revolutionising in-person payments to grow your business with a trustworthy and innovative solution.

Location:

2

Funding Rounds

Krowd is an artificial Intelligence company founded in 2016 by Omar Rafii.

2

Funding Rounds

$13.0m

Money raised

The Wrisk Platform helps brands co-create, launch and operate customised insurance products.

Location:

Key people:

6

Funding Rounds

$20.2m

Money raised

Adludio is a mobile sensory advertising founded in 2015.

2

Funding Rounds

$20.0m

Money raised

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

1

Funding Rounds

$500.0k

Money raised

Devyce is a phone systems for SMBs founded in 2020 by Nick Browne.

Location:

Key people:

1

Funding Rounds

$1.1m

Money raised

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

1

Funding Rounds

$2.0m

Money raised

Supercharge your full B2B sales cycle using personalised and collaborative Pods. Think microsites for salespeople.

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