65 Best Developer Tools Startups in London to Watch in 2025

The Definitive Seedtable Ranking of Developer Tools 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 77 start-ups with an aggregate funding of $1.5b. The average funding per company in this subset is $22.5m.

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

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5

Funding Rounds

$118.0m

Money raised

Qredo is a cross-chain protocol for asset managers and traders active in the digital asset markets.

7

Funding Rounds

$11.1m

Money raised

Sky Engine AI is an advanced data science technology and research company that develops evolutionary AI platform for deep learning in virtual reality for any computer vision applications.

Location:

Key people:

5

Funding Rounds

$37.7m

Money raised

42Crunch is an enterprise API security platform with integrated services, including an API firewall, to discover and remediate API security vulnerabilities.

Location:

Key people:

5

Funding Rounds

$21.0m

Money raised

Memgraph is an in-memory Cypher-compatible graph database.

Location:

Key people:

3

Funding Rounds

$36.7m

Money raised

Weaveworks is a company developing a delivery pipeline platform for building and operating applications, helping developers connect, monitor, and manage microservices and containers.

5

Funding Rounds

$31.4m

Money raised

Company developing collaboration platform for teams to create and maintain design system documentation

Location:

Key people:

1

Funding Rounds

$4.6m

Money raised

Tool for developers that runs Docker container builders on the cloud.

Location:

Key people:

2

Funding Rounds

$21.8m

Money raised

Privacy Automation Platform made to help businesses deliver transparent, trustworthy online experiences on autopilot

Location:

Key people:

9

Funding Rounds

$58.1m

Money raised

EVRYTHNG is a New York-based data services company founded in 2011 by Vlad Trifa, Dominique "Dom" Guinard, Niall Murphy, and Andy Hobsbawm.

2

Funding Rounds

$11.0m

Money raised

Cerbos is an access control decision engine for software.

Location:

Key people:

2

Funding Rounds

$75.0m

Money raised

Duda is a responsive website builder for digital marketing agencies, hosting companies, and online directories.

2

Funding Rounds

$20.0m

Money raised

Flock Cover is an insurance technology startup based in London.

Industries:

Location:

Key people:

4

Funding Rounds

$56.2m

Money raised

Provider of historical financial market data and analytics.

Location:

1

Funding Rounds

A property insurance platform that eliminates the need for office space deposits. Its office is located in London, England and it was founded in 2018.

2

Funding Rounds

$3.2m

Money raised

At Cyscale, we know that a safer Cloud means a safer World. We need to do something extraordinary to have a better, easier and more secure way of designing & deploying any Cloud Infrastructure in AWS, Azure, GCP, OpenStack, VMWare, IBM Cloud, Oracle Cloud and even Alibaba Cloud. That is why we create amazing tools so that everybody can build & deploy cloud infrastructure with security in mind, knowing the costs upfront, while maintaining continuous regulatory compliance. All done automatically with just a few clicks. We are the first Cloud Management, Security and Compliance company empowering both regular people and cloud professionals with visual tools to meet this level of cloud automation and security. We're Cyscale, born in the Cloud to protect the Cloud! Specialties: Advanced Threat Protection (APT), Behavioral Analytics, Cloud Computing/Storage, Cloud VM/Security, Compliance, Data Audit, Data Breach Prevention, Data Protection, Data Security, Identity Management (IAM), Incident & Breach Response, Machine Learning, Managed Services, MFA/Authentication Management, Network Security, Professional Services, Risk Management, SaaS

Location:

Key people:

5

Funding Rounds

$27.1m

Money raised

Qio Technologies Limited is a company providing digital twin solutions for industries, including their QiO Foresight Platform which unites energy, maintenance, production, and performance applications.

5

Funding Rounds

$65.4m

Money raised

Application launcher and productivity software developer for macOS.

Location:

Key people:

6

Funding Rounds

$20.1m

Money raised

Distributed is a company that offers on-demand teams of digital talent.

Location:

Key people:

3

Funding Rounds

$196.0m

Money raised

Builder.ai is a no-code app development platform founded in 2016.

1

Funding Rounds

$2.0m

Money raised

Dataform is a company that provides software to data teams to manage and organize data across their company. Dataform is based in the UK

4

Funding Rounds

$4.9m

Money raised

The one-stop solution for all your NLP needs in 100+ languages

2

Funding Rounds

$22.0m

Money raised

API that connects room sellers and hotels instantly.

2

Funding Rounds

$27.2m

Money raised

Northflank is a provider of a workload platform for developers founded in 2019 by Will Stewart, Will Stewart and Frederik Brix.

Location:

Key people:

1

Funding Rounds

$660.0k

Money raised

SaaS integration platform for SaaS companies. Deliver powerful integrations and workflows direct to users from within your SaaS application.

2

Funding Rounds

$31.9m

Money raised

Platform combining consultancy, software engineering, data science, and analytics expertise.

Location:

Key people:

2

Funding Rounds

$143.0m

Money raised

Platform providing tools to build real-time products on payment cards.

1

Funding Rounds

$3.9m

Money raised

WeArkivum Limited delivers software, services & expertise for long-term data management and digital preservation globally

1

Funding Rounds

$1.4m

Money raised

Expense management and travel booking system that helps track and justify spending on Salesforce.

1

Funding Rounds

$24.1m

Money raised

Glasswall is a platform that protects organizations from file-based threats founded in 2005.

Location:

2

Funding Rounds

$5.2m

Money raised

Platform for managing customer relationships and multi-channel messaging to help businesses grow.

2

Funding Rounds

$4.2m

Money raised

Slip aims to create an omnichannel and frictionless experience for Retailers and their customers.

Industries:

Location:

1

Funding Rounds

$20.0m

Money raised

AI-powered code optimization platform for machine learning and data-heavy applications.

Location:

Key people:

1

Funding Rounds

CensorNet's award-winning cloud-based security software delivers enterprise-class security and flexibility to over 4,000 customers around the world.

1

Funding Rounds

$6.6m

Money raised

Surfboard provides scheduling and building workforce management through customer service software.

3

Funding Rounds

$29.2m

Money raised

Platform providing server-less, real-time data processing and back-end application services.

Location:

Key people:

2

Funding Rounds

$49.7m

Money raised

Weavr is a business payment management tool founded in 2018.

2

Funding Rounds

$7.6m

Money raised

Gendo is an AI-powered architectural platform founded in 2022 by Will Jones.

1

Funding Rounds

$640.0k

Money raised

Airex is a smart ventilation control that builds intelligent air ventilation units using atmospheric sensors and cloud algorithms.

2

Funding Rounds

$11.6m

Money raised

The SaaS software platform for managing and monetizing music & media assets

1

Funding Rounds

$19.8m

Money raised

Cogna is a precision solutions provider founded in 2023 by Ben Peters .

2

Funding Rounds

$1.7m

Money raised

Provider of no-code 3D web platform.

Location:

Key people:

1

Funding Rounds

$11.0m

Money raised

Platform offering product strategy, data engineering, mobile apps, cloud services, software development, consulting, UX research, and design solutions.

1

Funding Rounds

$500.0k

Money raised

Trigger.dev is a coding tool for automating complex workflows founded in 2022 by Matt Aitken, Eric Allam, Daniel Patel and James Ritchie.

Industries:

Location:

Key people:

1

Funding Rounds

$9.5m

Money raised

Platform for turning complex data into vector embeddings.

1

Funding Rounds

$15.0m

Money raised

Plain is a B2B customer support platform founded in 2020 by Simon Rohrbach.

Location:

Key people:

1

Funding Rounds

$70.0m

Money raised

Railsbank is a platform and financial services, enabling banks, businesses and brands to define the future of consumer and SME finance.

1

Funding Rounds

$2.4m

Money raised

Monolith AI develops an AI assistant designed to help engineers improve product development.

1

Funding Rounds

$500.0k

Money raised

CodeStory is a developer of a code-based software platform founded in 2023 by Sandeep Pani.

1

Funding Rounds

$3.6m

Money raised

Instill AI is a no-code data tool founded in 2020.

$1.7m

Money raised

Klu is a large language model application platform founded in 2022.

$2.5m

Money raised

Open source deployment platform to integrate multiplayer functionality.

1

Funding Rounds

$270.0k

Money raised

Platform enabling property developers and investors to find potential sites and contact landowners directly.

1

Funding Rounds

$3.0m

Money raised

Runware is an AI-powered generative media API provider founded in 2023 by Ioana Hreninciuc.

Key people:

$2.8m

Money raised

Platform to make LLM deployment faster, cheaper, and simpler.

1

Funding Rounds

$5.0m

Money raised

API gateway and management platform offering open source solutions for on-premises, cloud, and enterprise environments.

1

Funding Rounds

$13.0m

Money raised

Professional services firm specializing in cloud enablement solutions for telecom companies, cloud service providers, independent software vendors, and managed service providers.

1

Funding Rounds

$1.0m

Money raised

SaaS marketplace, clean room technology, full transparency, privacy and data compliance at scale

1

Funding Rounds

$670.0k

Money raised

Community app for single parents to connect with others nearby for support, guidance, and virtual meetups.

1

Funding Rounds

$3.3m

Money raised

Generates infrastructure for your code in your cloud account so you can build on AWS without having to learn it

1

Funding Rounds

$1.9m

Money raised

Cloud management platform providing secure, cost-efficient, and self-service solutions for multi-account environments.

1

Funding Rounds

$200.0k

Money raised

Community of no-code and low-code application developers focused on SaaS and Enterprise solutions.

2

Funding Rounds

$62.0m

Money raised

AutogenAI is a natural language processing solution for bids founded in 2022.

1

Funding Rounds

$850.0k

Money raised

Automated analytics platform that helps small businesses combine their financial and sales data.

1

Funding Rounds

$20.0m

Money raised

SurrealDB is a multi-model database platform for developers founded in 2022.

1

Funding Rounds

$600.0k

Money raised

RoyaltyRange is a database providing royalty rates for intellectual property founded in 2012.

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