Top SaaS Startups in the UK [2025]: Fast-Growing Tools in Fintech, AI & B2B SaaS

We’ve put together a list of the top 50 UK startups to watch in 2025.

From AI-powered platforms and next-generation SaaS tools to breakthroughs in fintech, healthcare, and enterprise infrastructure, UK startups are driving innovation at a global scale.

This list highlights the most ambitious and fastest-growing UK startups that are raising capital, winning customers, and reshaping industries from finance and healthcare to productivity, retail, and defense.

Let’s dive in.

1. Synthesia

Industry: Artificial intelligence, generative AI video

AI-powered platform for enterprises to create synthetic video content with realistic avatars from text, documents, or webpages.

Location: London, UK
Founded: 2017
Last Funding Round: Series D, $180M (January 2025)
Total Funding: Over $330M
Valuation: $2.1B post-money as of January 2025
Number of Users: Over 60,000 enterprise customers, including more than 60% of Fortune 100 companies
Growth Rate: Rapid scaling; employee count over 400 by mid-2025; doubled valuation since Series C in mid-2023

Key Features

Text-to-video conversion, custom and expressive AI avatars, support for 60+ languages, webcam-generated avatars, interactive video assistant, translation, compliance and deepfake safeguards, enterprise-grade video editing APIs

2. Multiverse

Industry: EdTech / Apprenticeships

Multiverse is a UK-based EdTech company offering professional apprenticeships in AI, data, and tech. They provide work-based learning with 1:1 coaching, AI-powered support, and degree-level qualifications, partnering with over 1,500 employers including Microsoft, Citi, and Capita.

Location: London, UK
Founded: 2016
Last Funding Round: Series D, $220M (June 2022)
Total Funding: $415M
Valuation: $1.7B
Number of Users: 22,000+ learners
Growth Rate: 29% year-over-year revenue growth (2023–2024)

Key Features

Degree apprenticeships, AI-powered coaching (Multiverse Atlas), Microsoft 365 Copilot integration, employer-funded programs, public funding eligibility via UK apprenticeship levy, partnerships with major employers

3. Payhawk

Industry: Fintech / Spend Management & Corporate Cards

Integrated platform combining company cards, expense management, invoice processing, and multi-entity spend control to streamline finances for SMEs and enterprises.

Location: London, UK
Founded: 2018
Last Funding Round: Series B extension, $100M (March 2022, Series B total $215M at $1B valuation)
Total Funding: ~$239M over five rounds
Valuation: $1B post–Series B extension as of March 2022
Number of Users: Operates in 30+ countries; serves enterprise clients globally (exact user count not disclosed)
Growth Rate: Revenue grew from ~$71M in 2023 to ~$87.7M in 2024 (~23% YoY); team size ~371 employees by 2024

Key Features

Company cards (virtual & physical), real-time receipt capture and approvals, invoice automation, multi-currency IBANs, ERP/accounting integrations, budgets & compliance workflows, global spend dashboards, Mastercard and Visa integrations

4. PhysicsX

Industry: AI-native engineering software / Deep tech SaaS

Platform using generative AI to accelerate physics simulation and engineering design across industries such as aerospace, automotive, renewables, semiconductors and materials.

Location: London, UK
Founded: 2019
Last Funding Round: Series B, $135M (June 2025)
Total Funding: ~$170-175M
Valuation: Just under $1B (Centaur status)
Number of Users: Close to 150+ employees; enterprise clients include Rio Tinto, Leonardo Aerospace
Growth Rate: Quadrupled revenue since Series A; revenue growth 4×; team scaled from ~50 to 150 in two years

Key Features

AI-native physics simulation, generative engineering optimization, scalable modeling across complex systems, enterprise integrations, rapid design iteration, industrial-grade reliability and performance analytics

5. Codat

Industry: Financial Software / SMB data integration API

Provides a universal API enabling fintechs and banks to sync small business accounting, payments, commerce and payroll systems into client products, reducing integration cost and improving data access.

Location: London, UK
Founded: 2017
Last Funding Round: Series C, $100M (June 2022)
Total Funding: $172M
Valuation: ~$825M post-money as of June 2022
Number of Users: Serves over 200 fintech and financial services clients
Growth Rate: 3× annual revenue growth in 2021, headcount doubled year-over-year; team ~230 employees as of mid-2022, revenue estimated $25–27M in 2022

Key Features

Unified SMB data API (accounting, banking, commerce, payroll), real-time data sync, standardized data mapping, developer-first SDKs, integrations across fintech platforms, scalable infrastructure for data access, support for multiple financial data types

6. Tessl

Industry: AI Native Software Development

Tessl enables software creation through natural language specifications, autonomously generating and maintaining code that adapts continuously without manual updates.

Location: London, UK
Founded: 2024
Last Funding Round: $125 million
Total Funding: $125 million
Valuation: $750 million
Number of Users: Not publicly disclosed
Growth Rate: Recognized as #2 startup on Sifted's 2025 B2B SaaS Rising 100 list

Key Features

Natural language specifications, autonomous software generation, continuous adaptation, cross-platform support, security optimization

7. Omnipresent

Industry: Global employer-of-record platform, HR tech, compliance and payroll for remote/distributed teams

SaaS platform enabling companies to hire, onboard, manage payroll, benefits and compliance for employees in 160+ countries without local entity setup.

Location: London, UK
Founded: 2019
Last Funding Round: Series B, $120M, March 22, 2022
Total Funding: Approximately $138M
Valuation: £468M post-money as of Mar 29 2022
Number of Users: Not publicly disclosed (platform supports clients hiring and managing employees in 160 countries)
Growth Rate: Team grew ~10× (to ~230+ employees across >40 countries) and revenue ~25× in 2021; headcount ~328 by mid-2025

Key Features

Global onboarding and compliance, payroll & benefits administration, contractor conversion support, local contracts & tax filings, unified billing, HR workflow integration, platform dashboards and compliance automation

8. Rossum

Industry: Intelligent Document Processing (IDP), AI SaaS

Rossum offers an AI-powered platform that automates data extraction from transactional documents, such as invoices and purchase orders, streamlining workflows and reducing manual data entry.

Location: London, UK
Founded: 2017
Last Funding Round: Series A, $100 million, October 2021, led by General Catalyst
Total Funding: $108.8 million
Valuation: $500 million (as of 2024)
Number of Users: Over 450 enterprise clients globally
Growth Rate: 60.77% year-over-year revenue growth from 2023 to 2024

Key Features

AI-driven document data extraction, cloud-native platform, integration with ERP systems, customizable workflows, ISO 27001 and HIPAA compliance, 24/7 support

9. Elwood Technologies

Industry: Institutional digital-assets trading infrastructure (crypto-fintech SaaS)

Provides unified API access to global crypto exchanges, custodians and liquidity venues via proprietary execution management (EMS) and portfolio/risk analytics (PMS) systems for institutional investors.

Location: London, UK
Founded: 2018
Last Funding Round: Series A, $70M in May 2022
Total Funding: $70M
Valuation: ~$500M post-Series A
Number of Users: Not publicly disclosed; serves institutional clients integrating via API
Growth Rate: Revenue ≈ $30.9M in 2023; team ~214; recognized with Hedgeweek "Technology of the Year" award in 2024

Key Features

Unified EMS and PMS platform, execution analytics (PnL, risk, collateral monitoring), SOC 2 & ISO 27001 certified, regulated by FCA for security tokens/derivatives, institutional-grade order routing, portfolio-management dashboard, seamless connectivity to liquidity venues

10. Vertice

Industry: SaaS-based procurement and cloud/SaaS spend optimization platform

Unified procurement platform using AI-supported workflows and real-time benchmark data to control, track and reduce enterprise software and cloud spend.

Location: London, UK
Founded: 2021
Last Funding Round: Series C, $50M, January 22, 2025
Total Funding: Approximately $101M
Valuation: Reported around $500M post-money as of Series C
Number of Users: Not publicly disclosed; platform manages over $3.4 billion in SaaS/cloud spend for hundreds of enterprise customers
Growth Rate: ARR grew ~13× over ~2.5 years; headcount scaled to ~250–300 employees

Key Features

AI-powered spend optimization workflows, real-time vendor & pricing benchmarks, procurement orchestration, anomaly detection in spend, contract ingestion and analytics, unified SaaS & cloud cost management, integration into finance workflows, global coverage across major regions

11. PolyAI

Industry: Conversational AI / Voice assistant SaaS

AI-driven voice assistants that automate enterprise customer-service calls.

Location: London, UK
Founded: 2017
Last Funding Round: $50 million
Total Funding: $120 million
Valuation: $450–500 million
Number of Users: Not publicly disclosed
Growth Rate: Doubled team size in 6 months; 25% of team now US-based

Key Features

Multilingual voice assistants, enterprise integrations, scalable workflows, use across industries

12. Primer

Industry: Fintech - payments orchestration platform (payment automation and gateway routing across multiple PSPs)

API-based drag-and-drop workflow system that enables e-commerce merchants to integrate and mix-match payment providers, fraud tools, tax services and more via a single orchestration layer.

Location: London, UK
Founded: 2019/early 2020
Last Funding Round: $50M Series B, November 2023
Total Funding: ~$73.2M
Valuation: $425M
Number of Users: Not publicly disclosed; serves dozens of mid-market and enterprise merchants
Growth Rate: Rapid growth - projected ~200% revenue growth in 2024; headcount grew from ~70 to ~200+ employees

Key Features

No-code visual payment workflow builder, unified API gateway to 45+ payment/fraud/tax integrations, intelligent routing and fallback logic, approval rate optimization, global payments orchestration without handling funds directly, real-time observability and automation layer

13. Volt Open Banking

Industry: Open banking / Payments gateway (A2A payments)

Real-time payments platform enabling merchants and PSPs to process account-to-account transactions via connected APIs across banks in UK, EU and Brazil (coverage of 5,000+ banks).

Location: London, UK
Founded: 2019
Last Funding Round: Series B, $60M in June 2023
Total Funding: Over $87M
Valuation: Estimated just over $350M post-Series B in mid-2023
Number of Users: Not publicly disclosed; serves merchants like Shopify, Farfetch, Vestaire Collective, eToro
Growth Rate: Rapid expansion—launched into APAC and Americas post-Series B; team size grew to ~150 staff; coverage in 31 countries by late-2024

Key Features

Instant account-to-account payments, unified A2A gateway API, bank account ownership verification (Verify product), cash-management tools, fraud prevention, dashboards, real-time reconciliation, global expansion across UK, Europe, Brazil, APAC and Americas

14. Granola

Industry: AI-powered productivity SaaS

AI-enhanced notepad that combines manual notes with meeting transcriptions, offering personalized summaries, action items, and collaborative features for individuals and teams.

Location: London, UK
Founded: 2023
Last Funding Round: $43 million (Series B May 2025)
Total Funding: $67 million
Valuation: $250 million
Number of Users: Over 10% weekly user growth since launch
Growth Rate: Rapid adoption among VCs and founders; expanding usage beyond meetings to personal note-taking

Key Features

AI-powered meeting transcription, personalized summaries, action items, collaborative team folders, Slack integration, customizable meeting templates, searchable transcripts, enterprise collaboration tools

15. Weavr

Industry: Embedded finance, BaaS, open banking for SaaS platforms

Plug-and-play embedded finance infrastructure enabling digital businesses to embed banking, payment, card issuance and mass payment capabilities without deep compliance or regulatory setup.

Location: London, UK
Founded: 2018
Last Funding Round: Series A, $40M, February 2022
Total Funding: $55M
Valuation: $210M as of early 2022 post-money
Number of Users: User base tripled post-Series A with over 340% growth in transactions within 12 months
Growth Rate: Users tripled after Series A; transactions surged over 340% in 12 months; revenue growth 3×; team grown from ~75 in 2021 to 100+; $22.9M revenue in 2025

Key Features

Plug-and-play APIs for payments and card issuance, open banking + BaaS integration, embedded Visa card issuance for HR SaaS, multi-PI payment orchestration, scalable compliance, global IBAN accounts and multi-currency support, Embedded Payment Run toolkit for AP optimization, developer-focused sandbox platform

16. Inforcer

Industry: SaaS for MSPs, Microsoft 365 security & compliance automation

Cloud platform helping MSPs manage Microsoft 365 tenants at scale, including security baselines, compliance, backups, AI readiness, and reporting.

Location: London, UK
Founded: 2022
Last Funding Round: Series B, $35M, July 2025 (led by Dawn Capital)
Total Funding: $54M
Valuation: ~$200M (estimated)
Number of Users: 800+ MSPs, serving 3–5M end users
Growth Rate: ~10× year-on-year

Key Features

Standardized Microsoft 365 policy deployment, policy drift detection, nightly backups, AI-based policy analysis, AI readiness assessment, compliance alignment (CIS, NIST, ISO), tenant tagging, branded audit reporting

17. Gaia Family

Industry: Fintech / HealthTech / IVF insurance & fertility financing

Data-driven IVF insurance and financing platform that uses AI to predict number of treatment cycles and assumes financial risk so users pay only if they have a live birth, supplemented with community and emotional support.

Location: London, UK
Founded: 2019
Last Funding Round: Venture round, $14M, January 27, 2025 (led by Valar Ventures)
Total Funding: ~$38M
Valuation: Estimated ~$100M enterprise value as of 2025
Number of Users: Not publicly disclosed
Growth Rate: Employee count grew ~27% YoY to ~195 employees; estimated $35.8M revenue in most recent year

Key Features

AI-powered IVF outcome prediction (Gabi platform), risk-sharing financial model, transparent pricing, up-front clinic payment, refund if unsuccessful after 3 cycles, optional counselling/nutritional support, peer community access, clinic matching, flexible repayment plans

18. AutogenAI

Industry: Generative AI for proposal and bid writing automation

AI-powered platform that generates bespoke bids, tenders, and proposals by combining large language models with customers' proprietary data and winning past work patterns.

Location: London, UK
Founded: 2022
Last Funding Round: Series B, ~$39.5M (2024–25 period, Salesforce Ventures + Blossom Capital)
Total Funding: ~$64.8M
Valuation: Estimated in "hundreds of millions"
Number of Users: At least 28 enterprise clients within six months; serving Fortune 500 firms, consultancies, government agencies, non-profits
Growth Rate: 70% reduction in drafting time, 85% cost savings, 30% win rate uplift, 12.4% revenue growth last year

Key Features

Custom-built language engines per client, integrated data context, compliant and grounded output, accelerated drafting workflows, research augmentation, review checkpoints, quality compliance framework, ROI-focused metrics, enterprise-level security and submission readiness

19. Opna

Industry: Climate fintech / Carbon project financing platform

Enables corporations to discover, finance and monitor high-quality voluntary carbon removal projects, with digital portfolio management and proprietary risk assessment.

Location: London, UK
Founded: 2022
Last Funding Round: Seed, $6.5M, August 24, 2023
Total Funding: $8.34M
Valuation: ~$17.5M post-money as of Seed 2023
Number of Users: Not publicly disclosed; onboarded tens of carbon project developers and several enterprise beta corporate users
Growth Rate: Small team scaling from ~5 to ~15; early revenue stage

Key Features

Project discovery marketplace, financing facilitation, digital monitoring dashboard with KPI tracking, proprietary risk-scoring engine using 280+ data points, subscription-based tracking/reporting, transaction-fee-based model

20. Get Harley

Industry: Tele-dermatology / Aesthetic health-tech

Online platform matching consumers with vetted skincare clinicians for personalised virtual consultations and curated medical-grade product regimes, shipped globally.

Location: London, UK
Founded: 2019
Last Funding Round: Series B, $52M, June 6, 2023
Total Funding: $52M
Valuation: ~$11.4M post-money (as of August 2020)
Number of Users: 100,000+ patients served to date
Growth Rate: Triple-digit annual growth since launch; team grew from ~70 to ~140

Key Features

Virtual skin consultations, network of 1,000+ vetted clinicians, curated clinical-grade product delivery, automated regimen logistics, global delivery, patient concierge support

21. BeamXR

Industry: Software Development SDK for live-streaming and user-generated content in VR/XR games

BeamXR develops an SDK enabling seamless live streaming from standalone VR headsets to platforms like Twitch, TikTok, and YouTube, with features including live-streaming cameras, in-game social engagement, and clipping tools.

Location: North Shields, UK
Founded: 2023
Last Funding Round: Pre-seed, £532M, December 2024
Total Funding: £532M
Valuation: Not publicly disclosed
Number of Users: Early-stage startup, no public data
Growth Rate: Not publicly available

Key Features

Live-streaming cameras, in-game social engagement, clipping tools, seamless streaming to major platforms from standalone VR headsets

22. Allica Bank

Industry: Financial services — UK challenger bank focused on SME business banking

Digital-first bank offering lending, savings, current accounts and relationship-based SME banking with proprietary technology and local support.

Location: London and Milton Keynes, UK
Founded: 2019
Last Funding Round: Series C, £100M, December 2022 (led by TCV)
Total Funding: ~£321M
Valuation: Not publicly disclosed; on track toward £1B
Number of Users: ~13,000 SME customers as of mid-2024; 6,000+ with Business Rewards Account by end of 2024
Growth Rate: Revenue up ~68% in 2024 to £293M; lending up ~54% to £3B; deposits up ~68% to £4B; CAGR ~650% between 2020–2023

Key Features

SME-focused banking services including Business Rewards Account with cashback and no fees, dedicated relationship managers, in-house tech stack with integrations (Wise, Xero, Sage), digital savings and lending, relationship-backed automation, proprietary banking platform

23. Shop Circle

Industry: AI-powered eCommerce SaaS

Aggregator and operator of platform-agnostic B2B software tools for eCommerce brands, combining in-house and acquired apps into a unified suite for workflow automation and growth.

Location: London, UK
Founded: 2021
Last Funding Round: Series B, $60M, February 2025
Total Funding: ~$200M
Valuation: Not publicly disclosed
Number of Users: 120,000+ businesses globally
Growth Rate: +110% YoY revenue growth; profitable two consecutive years; ~360% YoY growth in 2023

Key Features

Unified eCommerce app suite, AI-guided product discovery, upselling tools, inventory management, review management, tech-stack optimization consultancy

24. Xelix

Industry: AI-powered Accounts Payable automation software for enterprises

Agentic AI platform that bolts into ERP and finance systems to detect payment errors and fraud, automate supplier statement reconciliation, and streamline AP Helpdesk operations.

Location: London, UK
Founded: 2018
Last Funding Round: Series B, $160M, July 2025 (led by Insight Partners)
Total Funding: ~$165M
Valuation: Not publicly disclosed
Number of Users: 130+ enterprise customers processing 115M+ invoices annually across $750B in spend
Growth Rate: Revenue $7.2M in 2024 with ~41% YoY growth

Key Features

Xelix Protect (ML-based payment audit), Supplier Statement Reconciliation, Insight (BI analytics), Helpdesk AI ticketing module, vendor master data cleansing, autonomous invoice agents, risk analytics, cross-system integration

25. Ascendx Cloud

Industry: Enterprise CRM SaaS solutions with AI-driven data workflows

AI-powered CRM apps that optimize Salesforce, ServiceNow, and Snowflake data into actionable insights by automating customer interactions, internal task routing, and sales workflows.

Location: London, UK
Founded: August 2023
Last Funding Round: $110M (2023)
Total Funding: $110M
Valuation: Not publicly disclosed
Number of Users: 500+ enterprise customers, incl. Fortune 500 firms (DoorDash, Verizon, J&J)
Growth Rate: ~300% revenue growth in 2024; rapid scaling; strategic acquisition of CapStorm to enhance AI capabilities

Key Features

AI-enhanced CRM workflow automation, real-time Salesforce data integration, task routing & lead assignment, compliance-aware secure data management, modular app suite (CapStorm, Documill, Ortoo, Eposly) for service, sales & operations automation

26. Sylvera

Industry: Climate tech, carbon market intelligence, machine learning-powered carbon offset ratings

Platform providing independent ratings, real-time pricing and project-level due diligence for carbon offset quality and delivery risk.

Location: London, UK
Founded: 2020
Last Funding Round: Series B, $57M, July 2023 (led by Balderton Capital)
Total Funding: ~$96M
Valuation: Not publicly disclosed
Number of Users: Not publicly disclosed (customer base grew ~7× since Series A)
Growth Rate: Customer base grew ~7× between 2022–2023; headcount 101–250 as of mid-2025

Key Features

Independent carbon credit ratings, pre-issuance and ongoing project monitoring, pricing dashboards, risk and methodology profiles, country-level analysis, continuous portfolio tracking, market commentary

27. Hyperexponential

Industry: Pricing Decision Intelligence software for property-casualty insurance

AI-powered underwriting and pricing platform (hx Renew) enabling insurers to automate data ingestion, feature engineering, model deployment and portfolio-level pricing decisions.

Location: London, UK
Founded: 2017
Last Funding Round: Series B, $73M, January 11, 2024
Total Funding: ~$91M
Valuation: Not publicly disclosed
Number of Users: ~20–40 major insurers globally, writing over $45B GWP via hx Renew annually
Growth Rate: Sales grew 10× since Series A (2021); team scaled from ~18 to ~120 employees

Key Features

Automated data consolidation from broker/actuarial sources, ML-based risk pricing, fast rater build (10× quicker), governance and model testing, portfolio- and individual-level pricing decisions, API integrations, ISO 27001 compliant infrastructure

28. Lindus Health

Industry: HealthTech, AI-enabled contract research organization (anti-CRO)

AI-driven full-stack clinical trial platform automating end-to-end trial design, recruitment, monitoring, and data management to run trials significantly faster and more reliably.

Location: London, UK
Founded: 2021
Last Funding Round: Series B, $55M, January 22, 2025
Total Funding: $80M+
Valuation: Not publicly disclosed
Number of Users: 80+ full-phase trials; 36,000+ patients enrolled across UK, US, EU
Growth Rate: Trials run ~3× faster than traditional CROs; revenue and headcount scaled rapidly post-Series A; ~132 employees as of mid-2025

Key Features

AI-generated protocol design, real-time data capture & monitoring, eClinical platform (Citrus™), fixed milestone-based pricing, direct recruitment via EHRs, ML-based risk prediction, unified recruitment-to-data delivery platform

29. Robin AI

Industry: LegalTech — generative AI legal intelligence platform for contract review and broader legal tasks

AI-powered legal assistant that drafts, reviews, and queries contracts using large language models and proprietary legal datasets, with lawyer-in-the-loop supervision to ensure accuracy and reduce legal fees.

Location: London, UK
Founded: 2019
Last Funding Round: Series B, $25M, November 2024
Total Funding: ~$61.5M
Valuation: Not publicly disclosed
Number of Users: Not disclosed; serves enterprise clients including PepsiCo, PwC, UBS, KPMG, Pfizer, Blue Origin
Growth Rate: Revenue grew ~227% over 3 years; U.S. operations expanded 6× in 2024; customer base 4× and revenue 5× post-Series B

Key Features

AI contract copilot (Microsoft Word add-in), drafting & editing, contract repository search, Robin Reports (document summarization), legal analytics, proprietary contract dataset, hybrid AI + lawyer model, Claude LLM integration

30. Griffin

Industry: Fintech / Banking-as-a-Service

UK's first full-stack API-first banking platform for fintechs and embedded finance companies offering accounts, payments, savings, and compliance tools.

Location: London, UK
Founded: 2017
Last Funding Round: Series A, $24M, March 2024
Total Funding: ~$59.7M
Valuation: Not publicly disclosed
Number of Users: Not disclosed
Growth Rate: $17.1M revenue in 2023; strong early growth since 2017 launch

Key Features

API-first banking platform, full suite of financial services (accounts, payments, savings), automated compliance, developer-friendly APIs, sandbox environment, AI-powered finance features

31. Easol

Industry: SaaS, experience commerce platform for events, festivals, tours and retreats

All-in-one platform enabling creators to build branded websites, manage bookings, payments, marketing, and operations for experience-based businesses globally.

Location: London, UK
Founded: 2017
Last Funding Round: Series A, $30M, February 29, 2024
Total Funding: ~$59.5M
Valuation: Not publicly disclosed
Number of Users: Creators in 130+ countries; ~80 staff (mid-2025) vs. ~34 in 2022
Growth Rate: Customer base grew 913% (2020–2021); transactions ×50, platform spend ×30; ~$12.3M revenue with 42% employee growth in 2025

Key Features

Custom branded storefronts & website builder, booking manager (events, tickets, packages, lodging), flexible payments (deposits, plans, custom fees), marketing tools & analytics, customer data ownership, on-site event operations support

32. Peppy

Industry: HealthTech / Employee Benefits (gender-inclusive healthcare support)

Employer-funded platform offering employees unlimited access via chat and video to expert support in menopause, fertility, parenting, endometriosis, men’s health and hormone-related care.

Location: London, UK
Founded: 2018
Last Funding Round: Series B, $45M
Total Funding: ~$56M
Valuation: Not publicly disclosed
Number of Users: Platform used by 250+ enterprises; supporting 1.5M+ individuals globally
Growth Rate: ~10× growth since Series A (July 2021); 200+ staff by early 2023

Key Features

Unlimited live chat & 40-min video consultations, on-demand educational content & group sessions, menopause/fertility/endometriosis/PCOS/men’s health/parenthood support, courses & webinars, hormone/fertility home tests, employer-funded no-cost access, global B2B distribution

33. Duffel

Industry: Travel technology - API-first travel booking platform

API-first platform connecting OTAs and businesses directly with airline reservation systems (NDC-enabled), enabling real-time flight search, booking, and ancillaries without legacy GDSs.

Location: London, UK
Founded: 2017
Last Funding Round: Series B, $30M, October 28, 2019
Total Funding: ~$56M
Valuation: Not publicly disclosed
Number of Users: Not disclosed; serves OTAs and travel platforms
Growth Rate: ~$8-8.4M revenue in 2024; ~56 employees; team growth ~7% YoY

Key Features

NDC + legacy API support, real-time flight booking & seat selection, ancillaries, Duffel Components UI library, accreditation piggybacking, multi-language SDKs, IATA NDC compliance, direct airline partnerships

34. Doccla

Industry: HealthTech - virtual ward & remote patient monitoring

Provides “hospital at home” service via wearables, mobile app, and clinician dashboard, enabling remote care, early discharge, and virtual clinical trials for NHS and European health systems.

Location: London, UK
Founded: 2019
Last Funding Round: Series B, ~$38–46M, September 2024
Total Funding: $50–55M
Valuation: Not publicly disclosed
Number of Users: 4M+ patient days monitored across 10+ European countries
Growth Rate: Revenue nearly quadrupled in 2023; scaling into DACH and France

Key Features

Remote monitoring kits (wearables + app), clinician dashboard with real-time alerts, EHR integration, high compliance (~92–97%), virtual trial support, logistics & onboarding, reduced emergency admissions & bed occupancy

35. Metaview

Industry: AI for Recruiting

AI-powered recruiting platform automating interview note-taking, job description drafting, candidate summarization, and analytics to improve efficiency and fairness in hiring.

Location: London, UK; San Francisco, USA
Founded: 2018
Last Funding Round: Series B, $40M, March 2024
Total Funding: ~$49.5M
Valuation: Not publicly disclosed
Number of Users: 2,500+ companies including Deel, Brex, Deliveroo, KellyOGC
Growth Rate: Not publicly disclosed

Key Features

AI interview notes, AI job descriptions, candidate insights, hiring performance reports, ATS & calendar integrations, SOC 2/GDPR/CCPA compliance

36. Raycast

Industry: Productivity / Developer Tools

Raycast is a keyboard-first productivity tool for macOS that enhances workflows by providing fast access to applications, files, and system functions. It offers features like clipboard history, window management, snippets, and integrations with GitHub, Jira, Slack, and more.

Location: London, UK
Founded: 2020
Last Funding Round: Series B, €27M, September 2024
Total Funding: $45M+
Valuation: Not publicly disclosed
Number of Users: 22,000+ developers
Growth Rate: Grew from 130 DAUs (Oct 2020) to 11,000+ within a year

Key Features

Keyboard-driven interface, AI-powered assistant, clipboard history, window management, snippets, integrations with GitHub/Jira/Slack, productivity extensions

37. Veed.io

Industry: Online video editing, AI-powered video content creation

Browser-native platform for creating, editing, and publishing videos with support for auto-subtitles, dubbing, AI avatars, text-to-video, templates, and team collaboration.

Location: London, UK
Founded: 2018
Last Funding Round: Series A, $35M, February 3, 2022
Total Funding: $35M
Valuation: Not publicly disclosed
Number of Users: 3M+ monthly active users
Growth Rate: ARR grew from ~$7M (2022) to ~$40M (2024, ~166% YoY); staff tripled to ~210 (2021–2023)

Key Features

AI avatars, Magic Cut auto-editing, auto subtitles/transcription, text-to-video (VEED GPT), collaboration & brand templates, AI voice dubbing, eye-contact correction, hosting & analytics

38. XYZ Reality

Industry: Augmented Reality for Construction

Engineering-grade AR helmet (HoloSite/Atom) paired with a cloud platform to overlay BIM/3D models onsite to within 5 mm precision, enabling real-time issue detection, progress tracking, and rework reduction in construction.

Location: London, UK
Founded: 2017
Last Funding Round: Series A, $28.2M, June 14, 2021
Total Funding: $34.5M
Valuation: Not publicly disclosed
Number of Users: Used across £1.5B+ worth of infrastructure projects
Growth Rate: ~30 employees (2021) with scaling adoption in mission-critical projects

Key Features

Engineering-grade AR helmet, BIM/3D model overlays onsite, 5 mm alignment accuracy, cloud-based issue tracking, Autodesk/BIM integrations, assisted-reality issue detection

39. V7

Industry: AI training data platform (image/video/document annotation)

Platform automating high-quality annotation workflows with auto-labeling, QA, collaboration, SDKs/APIs to accelerate training pipelines for computer vision and ML.

Location: London, UK
Founded: 2018
Last Funding Round: Series A, $33M, November 2022
Total Funding: $33M+
Valuation: Not publicly disclosed
Number of Users: 300+ enterprises (incl. GE Healthcare, Siemens, Paige AI)
Growth Rate: ARR grew 3× in 2022; rapid enterprise adoption

Key Features

Auto-labeling, programmatic labeling workflows, QA review tools, collaboration, Darwin-py SDK, CLI & open API, image/video/document/medical annotation support

40. Juro

Industry: LegalTech / SaaS / Productivity

All-in-one contract automation platform that helps legal and business teams manage the entire contract lifecycle - from creation to approval, signing, and storage - in a single workspace.

Location: London, UK
Founded: 2016
Last Funding Round: Series B, $23M, January 2022
Total Funding: ~$32M
Valuation: Not publicly disclosed
Number of Users: 6,000+ companies (Deliveroo, Trustpilot, Cazoo, Secret Escapes)
Growth Rate: Reported revenue $5.9M in 2024 (up from $2.9M prior year)

Key Features

Contract creation & editing, approval workflows, e-signatures, Salesforce/Slack/Google Drive integrations, centralized contract repository

41. Attio

Industry: Data-driven CRM / SaaS

Modern, no-code CRM that ingests and enriches email, calendar, and analytics data in real time to power customizable workflows and intelligent relationship management.

Location: London, UK
Founded: 2021
Last Funding Round: $33M, August 2024
Total Funding: $31.2M
Valuation: Not publicly disclosed
Number of Users: 2,000+ customers across 100+ countries
Growth Rate: Crossed $1M ARR by Dec 2022; reached GA March 2023; scaled rapidly to 2,000+ customers by end of 2023

Key Features

Real-time data aggregation, customizable workflows, AI-powered data enrichment, no-code CRM builder, email/calendar integrations, relationship intelligence analytics

42. Causal

Industry: Cloud-based financial planning, budgeting & predictive analytics (FP&A, forecasting, dashboards)

Collaborative modelling platform replacing spreadsheets with plain-English formulas, live data integrations, scenario planning and interactive dashboards.

Location: St Albans, UK
Founded: 2019
Last Funding Round: Series A, ~$20.2M, March 25, 2022
Total Funding: ~$25.9M
Valuation: Not publicly disclosed; acquired by Lucanet Nov 2024
Number of Users: Not publicly disclosed
Growth Rate: ~30% monthly customer growth during 2021–2022; strong scaling of revenue & headcount through 2022; acquired late 2024

Key Features

Human-readable formula modeling, automated data syncing (QuickBooks/Xero/Stripe/CRM), scenario versioning & comparison, interactive dashboards, variance analysis, BI-style analytics, live collaboration & commenting

43. Cledara

Industry: SaaS subscription & spend management for finance/ops

Platform unifying discovery, purchase, payment, management, and cancellation of software subscriptions with visibility, automation, and optimization insights.

Location: London, UK
Founded: 2018
Last Funding Round: Series A, $20M, September 2022
Total Funding: ~$24.4M
Valuation: Not publicly disclosed
Number of Users: 1,000+ customers in 32 countries managing 5,600+ SaaS vendors
Growth Rate: Revenue up ~32% in 2024 to $10.8M; ~830% SaaS volume growth YoY post-funding; 35%+ MoM growth in US expansion

Key Features

Live SaaS inventory, spend visibility, virtual cards for SaaS, approval workflows, automated invoice capture, vendor compliance tracking, usage analytics, optimization insights, one-click cancellations

44. StackOne

Industry: AI-enabled embedded integration / iPaaS

Unified real-time API layer using proprietary AI agents to automate deep SaaS & enterprise integrations (200+ connectors, 3,000+ actions) with zero-trust architecture and no customer PII stored.

Location: London, UK
Founded: 2023
Last Funding Round: Series A, $20M, May 2025
Total Funding: ~$24M
Valuation: Not publicly disclosed
Number of Users: Not disclosed; enterprise clients include Drata and Mindtools; processed 1B+ API calls
Growth Rate: Revenue more than doubled within weeks post-launch; connector coverage scaled to 200+ in ~2 years

Key Features

Real-time unified API, AI agent orchestration, deep automated mappings, 200+ connectors & 3,000+ actions, zero-trust integration security, bidirectional SaaS & AI agent integrations, enterprise-grade privacy

45. Ben

Industry: HR Tech — Employee benefits & rewards

AI-powered global benefits platform combining personalized allowances with debit cards and a marketplace, automating admin and employee communications.

Location: London, UK
Founded: November 2019
Last Funding Round: Series A, $16M, August 2022 (Atomico-led)
Total Funding: ~$21M
Valuation: Not publicly disclosed
Number of Users: Not disclosed; SME-focused, multi-country deployments
Growth Rate: Team scaled from ~35 (early 2022) to 51–100 (2025); ~98% client retention, ~95% engagement

Key Features

Personalized benefits budgeting, Mastercard-linked benefit card, AI-driven benefit matching, global benefits marketplace, HRIS/payroll integrations, automated admin & comms

46. Plain

Industry: B2B SaaS / Customer Support

AI-powered support platform for B2B teams, consolidating Slack, Teams, Discord, email, and chat into a unified interface for real-time, collaborative customer support.

Location: London, UK
Founded: 2020
Last Funding Round: Series A, $15M, February 2025
Total Funding: $21M
Valuation: Not publicly disclosed
Number of Users: Not publicly disclosed
Growth Rate: Plans to double workforce across sales, marketing, design & engineering in next 6 months

Key Features

AI-driven workflows, native Slack & Teams integration, cross-functional collaboration, real-time customer insights, integrations with Linear, Jira, Shortcut

47. Autone

Industry: Retail Tech / AI-driven Inventory Management

AI-powered platform for mid-market retailers delivering demand forecasting, inventory optimization, pricing, and stock management to cut waste and boost profitability.

Location: London, UK
Founded: 2022
Last Funding Round: Series A, $17M, October 2024
Total Funding: $20M
Valuation: Not publicly disclosed
Number of Users: Not publicly disclosed
Growth Rate: Not publicly disclosed

Key Features

AI demand forecasting, automated replenishment, retail system integrations, actionable insights, stock/waste optimization, profitability improvement

48. Apron

Industry: Fintech / Payments Automation

Fintech platform streamlining small-business financial ops with invoice capture, supplier payments, payroll, expenses, and reconciliation.

Location: London, UK
Founded: 2022
Last Funding Round: Series A, $15M, September 2023
Total Funding: $20.5M
Valuation: Not publicly disclosed
Number of Users: 10,000+ businesses
Growth Rate: Revenue hit $2.2M in 2023 with a 23-person team; strong growth since launch in 2022

Key Features

Invoice capture (email/WhatsApp/app), batch supplier payments, payroll sync, expense cards with limits, Xero & QuickBooks integration, task collaboration, SOC 2 certified, multi-currency support

49. Skyral

Industry: Strategic Modelling / AI-powered Digital Twins

AI-enabled platform combining data fusion, simulation, and behavioral modelling to build digital twins for complex decision-making in defense, infrastructure, and healthcare.

Location: London, UK
Founded: June 2023
Last Funding Round: Series A, $20M, June 2025 (NOIA Capital-led)
Total Funding: $20M
Valuation: Not publicly disclosed
Number of Users: Governments (UK, NATO, US) + private sector clients
Growth Rate: Rapid adoption since 2023; >60% contracts from public/private sector; global expansion underway

Key Features

AI-powered digital twins, behavioral modelling, infrastructure simulation, explainable AI, “what if?” scenario testing, modular simulation components (Core, Mirror, Phantom, Shadow), data fusion from public & proprietary systems

50. Semble

Industry: HealthTech SaaS

Flexible cloud platform for private healthcare providers integrating EHR, practice management, billing, telehealth, and patient engagement into one system.

Location: London, UK
Founded: November 2015
Last Funding Round: Series B, £10M ($15M), October 2024
Total Funding: £18.26M ($27M)
Valuation: Not publicly disclosed
Number of Users: 12,000+ healthcare professionals across 75 specialties
Growth Rate: Supported 19M+ appointments and 8M+ patients as of 2025

Key Features

Integrated EHR, patient management, billing & telehealth, e-prescriptions, AI-powered clinical notes, workflow automation, 1,200+ integrations, customizable booking, compliance tools, mobile access, SMS/email patient comms

Conclusion

What connects these companies isn’t just that they’re UK-based, it’s how quickly they’re scaling and reshaping industries.

For SaaS companies who want to stand out and scale faster, Omnius delivers GEO, SEO, and content marketing built for B2B SaaS, helping you capture demand and convert search intent into long-term growth.