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Top 2,157 SaaS Companies in London, United Kingdom, October 2026

As of October 2026, there are 2,157 SaaS companies based in London. They have combined revenues of $36.5B and employ 184.3K employees. They've raised $29.5B in capital and serve 112.1M customers combined.

Companies
2,157
Revenue
$36.5B
Funding
$29.5B
Employees
184.3K

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Sorting: Highest -> Lowest

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Top SaaS Companies in London

Showing 10 of 826 companies ranked by annual revenue.

1Verdn logo
Verdn

London, England, United Kingdom

An API to bundle trackable climate donations with any transaction.

Revenue
$1M
Customers
-
Year founded
2020
Funding
-
Team size
6
Growth
-
2Kaya logo
Kaya

London, England, United Kingdom

Marketing agency for startups: 10x cheaper, better and faster

Revenue
$1M
Customers
-
Year founded
2021
Funding
-
Team size
5
Growth
-
3Iona Mind logo
Iona Mind

London, England, United Kingdom

Software-based mental health support

Revenue
$1M
Customers
-
Year founded
2019
Funding
-
Team size
7
Growth
-
4Meticulous logo
Meticulous

London, England, United Kingdom

Automated e2e screenshot testing without writing or maintaining tests

Revenue
$1M
Customers
-
Year founded
2021
Funding
-
Team size
5
Growth
-
5Camlist logo
Camlist

London, England, United Kingdom

The super app for pets

Revenue
$1M
Customers
-
Year founded
2020
Funding
-
Team size
5
Growth
-
6PAIR logo
PAIR

London, Greater London, United Kingdom

PAIR | Your AI Adoption Platform Where human expertise is perfectly paired with AI capability. PAIR transforms AI licences into measurable performance gains through role-specific upskilling that ensures AI becomes embedded in daily workflows, not just learnt in theory. Our platform delivers personalised, contextual AI practice tailored to each individual's exact role, industry, and priorities, that drives lasting adoption across organisations. Why leading organisations choose PAIR: - Role-Based AI Transformation: Every exercise is generated for YOUR specific role and priorities, turning concepts into immediate productivity gains - Skills Certification: LinkedIn credentials that showcase your team's AI proficiency - Built-In Adoption Architecture: In-person leadership masterclasses, strategic nudges, and adoption & engagement frameworks that drive organisation-wide uptake - Real-Time ROI Measurement: Track time saved, quality improvements, and adoption rates by team and function through intuitive dashboards - Future-Proofed Skills: Monthly content updates reflecting the latest AI models and applications, with annual recertification to maintain relevance - Enterprise Security Standards: UK/EU/US hosting options, full GDPR compliance, and Cyber Essentials Plus accreditation Impact Metrics: - 40% of users save 5+ hours weekly within just three weeks of implementation - 94% report significant work quality improvements after adopting AI workflows - Trusted by public sector departments, FTSE enterprises, and AI technology leaders including You.com Don’t just buy your staff licences for AI tools - invest in transforming how they work with AI

Revenue
$1M
Customers
-
Year founded
2024
Funding
$500K
Team size
8
Growth
-
7Nico AI Ltd logo
Nico AI Ltd

London, Greater London, United Kingdom

Revenue
$1M
Customers
-
Year founded
-
Funding
-
Team size
-
Growth
-
8Little Blue Door logo
Little Blue Door

London, England, United Kingdom

Giving the traditional Travel Industry the kick up the a$$ that it needs. Our portfolio features a carefully curated collection of the world's finest hotels, exclusive villas, yacht rentals, and unique properties. Enjoy preferential rates, upgrades, special amenities and unique “money-can’t-buy” experiences, courtesy of our extensive expertise and connections. No rip offs, no mark ups, and best of all - we've actually travelled to all the locations we are recommending.

Revenue
$1M
Customers
-
Year founded
2021
Funding
-
Team size
2
Growth
-
9GoGTM logo
GoGTM

London, Greater London, United Kingdom

Most teams don’t need more cold outreach — they need smarter first touch. GoGTM’s Account Connect is a fully managed outbound layer that helps B2B teams engage the right accounts, earlier — with relevance, not volume. Whether you’re building your first outbound motion or supporting an existing team, we plug in to: * Warm up strategic accounts. * Spark qualified conversations * Create pipeline momentum without the overhead. Ideal for companies with complex buyer journeys and high-value offers, where trust-building matters more than spray-and-pray tactics.

Revenue
$1M
Customers
-
Year founded
2024
Funding
-
Team size
2
Growth
-
10Property Finance Group logo
Property Finance Group

London, Greater London, United Kingdom

Property Finance group specialises in securing the best development finance, bridging loans, high-value buy-to-let mortgages and commercial mortgages. We are all seasoned property professionals with decades of experience, and we know our way around the market like no other brokers. We founded PFG in 2014 because we knew we could offer a better service for developers and investors looking to secure finance. From initial inquiry to loan completion, we are here for you and will always have your best interests at heart. Our aim isn’t to complete as many loans as possible, but to make sure every client gets the best possible funding for their circumstances, and we will never put you into a situation which we do not think is the best solution for you.

Revenue
$1M
Customers
-
Year founded
2016
Funding
-
Team size
6
Growth
-