SaaS Companies Using PostHog in the UK: 119 Active Firms (2026)
SaaS companies using product analytics tools sell subscription cloud software while measuring user journeys across UK markets.
For companies running this product analytics stack, the buying centre usually sits between product, growth and engineering rather than finance or central IT. Teams use event-based instrumentation to follow acquisition, onboarding, activation, retention and conversion, with customer success sometimes using the same signals to spot churn risk. Adoption tends to signal a direct-channel SaaS motion with enough in-house technical capacity to define events, govern user identifiers and act on funnel evidence. The commitment is often a team-level subscription plus implementation time, not a broad enterprise systems programme.
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The UK adoption picture is narrow but visible: 119 SaaS companies are actively trading while running this product analytics stack. Reported employment across the cohort totals 989 people, and 118 of 118 firms report headcount, so the employment footprint is visible rather than inferred from a small minority. Within detected analytics tools across UK SaaS, the system sits fifth, with 3.8% adoption across a 3,165-company sector denominator. Registered-office geography is London-skewed: London accounts for 52.1% of the cohort, followed by the South East at 10.1%, the North West at 8.4%, the South West at 7.6% and the West Midlands at 5.9%.
UK SaaS suppliers are not licensed as a single sector, so obligations usually follow the activity and customer base rather than the software category. For companies running event analytics, the immediate pressure points are UK GDPR compliance, Data Protection Act duties, cookie and consent practices, controller-processor terms, retention policies and security controls around behavioural events. The ICO is the relevant data-protection regulator. Cloud dependency also matters: the CMA’s public-cloud infrastructure work found competition concerns and remedies, pointing to market concentration in the underlying hosting layer rather than a licensing regime for SaaS providers.
Adoption appears to sit with commercially active but still lean SaaS teams rather than procurement-heavy enterprise estates. That tends to favour analytics tools that combine event capture, experimentation and product feedback without forcing a long implementation cycle. Privacy governance is likely to shape use cases: teams may keep more behavioural analysis inside product and engineering workflows, with tighter controls on consent, retention and customer identifiers. The category also faces bundling pressure from broader web-analytics and cloud suites, so specialist adoption may depend on whether product teams value developer control and cross-functional instrumentation enough to maintain a separate stack.
Adoption by company size
Adoption of PostHog rises with company size across the trading UK SaaS companies in this cohort. 0.2% of the 37,913 companies with under 10 employees run PostHog (82 detected). 1.7% of the 1,886 companies with 10–50 employees run PostHog (33 detected). 0.6% of the 166 companies with over 50 employees run PostHog (1 detected). That is a 0.4% gap between the over 50 employees and under 10 employees bands.
119
Active firms
2026
3.8%
Of detected Analytics share
UK SaaS
7
Median headcount
Filed accounts
259
Verified contacts
Across this cohort
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Key facts
About 3% of the trading cohort reports turnover above £5M (4 of 119 firms) — the rest sits below that revenue band.
23% of the cohort was incorporated since 2022 (28 firms), so a sizeable share is in its first few filing cycles.
Among 3,165 SaaS companies with a detectable analytics system, this product analytics tool accounts for 3.8% (119); four other analytics systems have higher detected shares at 81.5% (2,580), 9.8% (311), 7.2% (228) and 4.4% (139).
The cohort is London-weighted: London accounts for 52.1% (62), followed by the South East at 10.1% (12), North West at 8.4% (10), South West at 7.6% (9) and West Midlands at 5.9% (7).
Stack overlap points to a product-led SaaS pattern: 80.7% (96) also run a traffic-security or CDN layer, 68.9% (82) also run tag-management tooling and 52.9% (63) also run a general web analytics system.
Adjacent tags show overlap with earlier-stage and technical software categories: 52.1% (62) are also tagged Startup, 32.8% (39) AI & Machine Learning, and 12.6% (15) Fintech or Scale-up.
SaaS suppliers are not generally licensed as a single sector; ICO exposure usually arises where user-journey analytics involves personal data under UK GDPR and the Data Protection Act 2018.
Analytics market share among UK SaaS
Share of the 3,165 UK SaaS with a detectable system. As of June 2026.
What else do PostHog-running SaaS run?
Share of the 119 PostHog-running UK companies where each technology was also detected. As of June 2026.
Where PostHog SaaS are, and how healthy they look
By region
By registered-office region; companies without a regional match count toward Rest of UK.
By financial health
From filed accounts; firms with fewer than two filings show as insufficient history.
7
Median headcount
£488.6K
Median UK turnover
3.4%
Above £5M turnover
28
Incorporated since 2022
259 verified decision-maker contacts
across these 119 companies, with emails available in Firmbase. Filter by role, seniority and stack.
Top UK SaaS using PostHog
Ranked by sales-readiness score: an AI model assesses what each company does, its sector and size, and scores its overall fit. Best-fit prospects appear first.
Provides an online sales and affiliate marketing platform for digital products and services. Offers tools for payment processing, order management, sales funnels, upsells, analytics, and an affiliate…
Serves online product vendors and affiliate marketers, including digital entrepreneurs and businesses selling software, supplements, memberships, downloads, eBooks, events and seminars.
Financial Health
N/AN/A
Location
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Computed from 2 filingsProvides online form-building software to create forms, surveys, quizzes, and polls, collect registrations, feedback, payments, and data, and integrate responses with other applications and automated…
Targets B2B and individual users, including entrepreneurs, educators, event organisers, marketers, HR, sales and IT teams, plus enterprises needing online data collection from audiences, customers,…
Financial Health
DistressedDistressed
Location
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Develops and operates an online design feedback platform that enables teams and clients to review websites, Figma files, images, videos, PDFs and presentations, leave comments, track revisions, and…
Sells to designers, creative teams and agencies that need feedback from clients and internal reviewers on websites, Figma files, images, videos, presentations and PDFs.
Financial Health
N/AN/A
Location
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Develops software-as-a-service for commercial insurance brokers, insurers and MGAs. Platform provides digital risk capture, quote and bind automation, delegated authority management, AI document…
Serves B2B customers in commercial insurance, including brokers, delegated authority underwriters, insurers and MGAs, particularly teams involved in open market broking and insurance distribution.
Financial Health
N/AN/A
Location
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Computed from 5 filingsDevelops software for creating interactive product demos, videos, and visual presentations. The platform captures product workflows via browser or desktop tools and uses AI-assisted editing to…
Serves B2B product-led companies, targeting go-to-market, marketing, product, sales, pre-sales, customer success, enablement and training teams that need to communicate product value to buyers and…
Financial Health
HealthyHealthy · Hiring · 7% CAGR over 4y
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Computed from 5 filingsProvides CRM software for dental practices that captures and manages treatment enquiries, tracks patient leads and conversion rates, automates follow‑ups, integrates marketing channels, and reports…
Sells B2B to dental practices, dental groups and dental brands seeking to manage and convert patient enquiries, including practice owners, managers and teams responsible for treatment leads and…
Financial Health
StableStable · Hiring · 28% CAGR over 4y
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Computed from 5 filingsDevelops and operates an online event management and ticketing platform that enables organisers to sell tickets, manage registrations and memberships, host virtual events, and use marketing tools,…
Serves event organisers and organisations running concerts, conferences, festivals, workshops, awards, online classes and membership programmes, from self-service creators to brands needing…
Financial Health
StableStable · -10% CAGR over 4y
Location
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Computed from 5 filingsProvides an online platform offering daily writing prompts and teaching resources for primary schools. Supplies images, story starters, questions, vocabulary lists, and printable activities that help…
Serves primary schools, classroom teachers and literacy leads seeking classroom writing support for pupils, including whole-class, small-group and one-to-one teaching contexts.
Financial Health
WeakWeak · -12% CAGR over 4y
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Computed from 5 filingsDevelops a work management and collaboration platform that combines task tracking, project boards, documents, and meeting transcription in one application. Provides features such as sprints, search,…
Serves individuals, small teams and companies of all sizes, particularly project, product and engineering teams, as well as service businesses collaborating with clients.
Financial Health
HealthyHealthy · Growing · 0% CAGR over 4y
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Computed from 4 filingsDevelops software for self‑storage operators that manages online unit bookings, payment processing, facility operations, pricing, and reporting. Platform includes website building tools, automation,…
Serves B2B self-storage operators, from single-site facilities to multi-site groups, in markets including the UK, EU, US, Canada and Australia. Targets owners and teams responsible for bookings,…
Financial Health
HealthyHealthy · Hiring · 41% CAGR over 3y
Location
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Computed from 3 filingsProvides a recruitment marketing platform that runs targeted job advertising across social media and search channels. Offers AI-based audience targeting, campaign management, analytics, and…
Serves enterprise talent acquisition teams, employer brand teams, hiring strategists, recruitment agencies and public sector employers that recruit across multiple roles, sectors and countries.
Financial Health
DistressedDistressed · -21% CAGR over 2y
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Computed from 4 filingsProvides an online learning management system for health and social care organisations. Platform offers digital training courses, compliance tracking, course and document management, incident…
Sells primarily to B2B health and social care organisations, especially small to medium-sized providers needing CQC compliance and staff training. Also serves care homes, charities, education,…
Financial Health
WeakWeak · -16% CAGR over 3y
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Computed from 3 filingsProvides an online platform for content creators, brands and agencies to manage influencer marketing campaigns, including collaboration tracking, contracts, messaging, creator discovery, campaign…
Serves professional and aspiring content creators, influencer marketing teams at brands, and creator management agencies handling social media, UGC, photoshoot, video and event collaborations.
Financial Health
WeakWeak · -59% CAGR over 2y
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Computed from 5 filingsProvides online booking and reservation software for organisations running classes, courses, workshops and events. Platform enables scheduling, ticket sales, payment collection, automated…
Serves businesses, sole organisers and non-profits that run classes, courses, workshops, activities and events, including online classes, leisure sessions, outdoor activities, conferences and…
Financial Health
StrongStrong · Growing, Hiring · 17% CAGR over 4y
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Computed from 5 filingsProvides a business development platform for recruitment professionals. Aggregates direct employer job vacancies, company intelligence, and hiring manager contacts, and offers tools to research…
Sells to B2B recruitment agencies, staffing firms and individual recruiters seeking employer leads, company intelligence and outreach support for business development.
Financial Health
StrongStrong · Growing, Hiring · 37% CAGR over 4y
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Computed from 5 filingsProvides email analytics and response-time tracking software for Outlook, Microsoft 365 and Gmail. The platform measures team email performance, assigns response deadlines, prioritises messages, and…
Serves mid-market and enterprise businesses with customer-facing email teams, including customer service, success, account management and internal service teams in legal, property management,…
Financial Health
HealthyHealthy · Hiring · 16% CAGR over 4y
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Computed from 5 filingsDevelops and operates a SaaS platform for billing, e‑commerce and business process automation. Software supports invoicing, subscription management, service provisioning, client management and…
Serves B2B subscription and service businesses, including web hosting providers, SaaS companies, digital agencies and other online service providers with recurring client relationships.
Financial Health
StrongStrong · Growing, Hiring · 22% CAGR over 4y
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Computed from 3 filingsDevelops online whiteboard software used by teams to run agile meetings, retrospectives, planning sessions and workshops. Platform provides collaborative canvases, templates, task tracking, shared…
Serves B2B agile software and product teams, including Scrum Masters, developers, agile coaches, delivery managers, product owners, engineering managers and product designers.
Financial Health
StrongStrong · Growing, Hiring · 13% CAGR over 2y
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Computed from 3 filingsDevelops AI software that analyses sales calls and customer interactions to generate insights, automate CRM data entry, score deals, prepare call briefs, and provide coaching feedback to help sales…
Serves B2B revenue teams, including sales leaders, RevOps teams and account executives, at companies managing sales pipelines, CRM processes, forecasting, coaching and customer conversation data.
Financial Health
StrongStrong · Hiring · 66% CAGR over 2y
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Computed from 5 filingsProvides an online professional development platform for schools and multi-academy trusts, offering instructional coaching tools, video observation, feedback workflows, and analytics to support…
Serves schools and multi-academy trusts, selling to education leaders responsible for teacher professional development, coaching and training.
Financial Health
StrongStrong · Growing, Hiring · 66% CAGR over 4y
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Computed from 3 filingsDevelops cloud software for finance teams that consolidates data from multiple Xero, QuickBooks and other accounting systems. Provides tools for group financial reporting, intercompany…
Sells to B2B finance teams, group finance directors, accountants and bookkeepers managing multi-entity organisations that use Xero, QuickBooks or Pennylane.
Financial Health
HealthyHealthy · Hiring · 15% CAGR over 2y
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Computed from 5 filingsProvides an online market research platform that enables businesses to create short surveys, target demographic audiences, collect responses from a mobile user panel, and analyse consumer insights…
Sells to businesses and agencies needing rapid consumer research, including brand, marketing, product, creative, strategy and insights teams running surveys for brand tracking, concept testing,…
Financial Health
StrongStrong · Hiring · 7% CAGR over 4y
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Computed from 4 filingsDevelops AI software that enriches product data and generates structured product‑page copy for ecommerce retailers. The platform analyses product information, fills data gaps, produces SEO‑optimised…
Serves ecommerce brands and retailers with large SKU catalogues, especially teams responsible for product content, merchandising, SEO, marketplace feeds and digital commerce operations.
Financial Health
StrongStrong · Hiring · 47% CAGR over 3y
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Computed from 3 filingsDevelops software for managing residential property conveyancing transactions. Platform connects estate agents, mortgage brokers, conveyancing law firms and clients, providing referral management,…
Serves a mix of B2B and B2C customers in property transactions: estate agencies, mortgage brokerages, conveyancing law firms, and home buyers or sellers needing conveyancing support.
Financial Health
StableStable · Hiring · 78% CAGR over 2y
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Computed from 5 filingsProvides an online learning platform offering browser-based coding labs, virtual development environments, and auto‑graded assessments for teaching AI, data science, cybersecurity, and software…
Sells to B2B and education buyers delivering technical training, including enterprises upskilling workforces, teams training data, AI, cybersecurity and software skills, plus colleges, universities,…
Financial Health
HealthyHealthy · Hiring · 19% CAGR over 4y
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Computed from 2 filingsDevelops and operates a software platform for building and running automated workflows and AI agents. Provides tools to design logic, create user interfaces, integrate third‑party services, and…
Serves founders, engineers, builders and service agencies seeking to create client-facing software, branded portals and internal automations, including fast-growing companies and teams using…
Financial Health
StableStable · Hiring · 75% CAGR over 1y
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Computed from 5 filingsDevelops and supplies cloud-based guest and payment management software for hospitality and entertainment venues. Platform includes mobile ordering and payment, booking and event management, CRM,…
Sells B2B to hospitality and leisure venue operators, including hotels, golf clubs, driving ranges, sports stadiums, amusement parks and entertainment venues, particularly teams managing guest…
Financial Health
StableStable · -67% CAGR over 4y
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Computed from 5 filingsDevelops AI-powered email assistant software that integrates with Gmail and Outlook to organise inbox messages, categorise emails, generate draft replies in a user’s writing style, and capture…
Sells to individual professionals, teams, and small to medium-sized businesses using Gmail or Outlook, with options for both self-serve users and organisational buyers seeking email and meeting admin…
Financial Health
StableStable · -31% CAGR over 4y
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Computed from 5 filingsDevelops mental health software for measurement‑based care, including digital screening tools, client intake and waitlist management, and outcome tracking platforms used by providers and…
Sells to B2B mental health service providers, healthcare organisations, health systems, schools, campuses and workplaces seeking tools to support clients, patients, employees or student populations.
Financial Health
StableStable · -9% CAGR over 4y
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Computed from 3 filingsDevelops AI software agents for trades and field service businesses. The system handles customer calls, booking and scheduling, appointment reminders, sales enquiries, and administrative tasks for…
Sells to B2B trades and field service companies, including gas, heating, fire and security, and property services firms with customer service, scheduling, sales and field engineering teams.
Financial Health
StableStable · Hiring · 73% CAGR over 2y
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Computed from 5 filingsProvides online wellbeing monitoring and safeguarding software for schools. Platform delivers surveys for pupils, staff, and parents, tracks mental health indicators, generates reports and alerts for…
Serves schools and multi-academy trusts, particularly senior leaders, DSLs, mental health leads and wellbeing teams responsible for pupil wellbeing, safeguarding, inclusion and staff/parent feedback.
Financial Health
StableStable · Hiring · 46% CAGR over 5y
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Computed from 4 filingsProvides an online platform for managing influencer and creator marketing campaigns. Enables brands and agencies to find creators, send campaign briefs, communicate, review and approve content,…
Serves marketing teams at consumer brands and agencies running influencer or creator campaigns, plus creators who collaborate on briefs. Targets organisations managing project-based content campaigns.
Financial Health
HealthyHealthy · 0% CAGR over 3y
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Computed from 3 filingsProvides property data, analytics and lead generation software for estate agents. Tools include prospecting for on‑market and off‑market properties, CRM-integrated data insights, landlord lead…
Sells B2B to UK estate agents and estate agency businesses, including agency owners, sales teams and CRM users focused on winning instructions and managing property-market contacts.
Financial Health
StableStable · -90% CAGR over 2y
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Provides a digital health and fitness coaching programme delivered through iOS and Android apps, WhatsApp and SMS. Offers subscription-based coaching, guidance and related resources to support users’…
Serves individual mobile users seeking health and fitness coaching, and targets partnerships with employers, brokers and insurers in the UK and US.
Financial Health
N/AN/A
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Computed from 3 filingsDevelops AI-powered software that automatically generates and maintains visual end‑to‑end tests for web applications by recording user interactions, tracking executed code paths, and replaying…
Sells to B2B software engineering, QA, and developer experience teams at organizations building complex web applications, from startups to larger technology companies.
Financial Health
WeakWeak · Hiring · 29% CAGR over 2y
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Computed from 5 filingsDevelops and operates software for NHS GP practices that supports online patient triage, appointment booking and communication. The platform integrates with EMIS and SystmOne systems and enables SMS…
Serves NHS primary care providers, especially GP practices and hubs across the UK, selling to clinicians, practice administrators and managers responsible for patient access and communications.
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WeakWeak · Hiring · 29% CAGR over 4y
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Computed from 5 filingsDevelops customer engagement software for contact centres, enabling agents to interact visually with customers through video calls, co‑browsing, screen sharing, AR remote assistance, document…
Sells to B2B contact centres and customer-facing teams in support, field service, telesales and technical support across automotive, BPO, finance, healthcare, retail, SaaS, telecoms, travel,…
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DistressedDistressed · -5% CAGR over 5y
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Computed from 5 filingsProvides a digital tinnitus management programme delivered via a mobile app offering audio-based coping exercises, relaxation and mindfulness sessions, soundscapes for sleep, and tools that connect…
Targets consumers experiencing tinnitus, including people struggling with sleep, stress or concentration, and hearing care professionals supporting tinnitus patients.
Financial Health
HealthyHealthy · Hiring · 39% CAGR over 4y
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Computed from 3 filingsDevelops an AI-powered quality assurance and training platform for customer support teams. Software analyses support tickets, automates QA audits, generates performance insights, runs simulated…
Sells to B2B customer support and customer experience teams, including CX managers, L&D managers, CS quality assurance leads, support team leads and agents in companies operating helpdesk-based…
Financial Health
WeakWeak · Hiring · 52% CAGR over 1y
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Computed from 2 filingsDevelops AI-powered digital workers for sales and customer engagement. Software automates prospect outreach, lead qualification, and phone interactions, integrating with business systems to manage…
Serves B2B sales, RevOps and go-to-market leaders at companies seeking to scale pipeline generation, prospect engagement and customer touchpoints, with messaging aimed at enterprise revenue teams.
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DistressedDistressed · 0% CAGR over 1y
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Computed from 4 filingsProvides a cloud-based business communication platform for sending and managing SMS and email messages. Offers bulk messaging, two-way texting, campaign automation, a shared inbox for multiple…
Serves B2B teams that communicate with customers at scale, including healthcare, education, professional services, technology, insurance, hospitality, beauty and wellness, entertainment, finance and…
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DistressedDistressed
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Computed from 3 filingsProvides AI‑driven software for social media content curation and scheduling, automatically selecting relevant articles and posts aligned with a brand’s topics and tone and publishing them to…
Serves social media marketers, digital agencies, small businesses and creators managing Facebook, LinkedIn and X accounts for their own brands or client audiences.
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WeakWeak · Hiring · 12% CAGR over 2y
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Computed from 4 filingsProvides an online learning platform offering video courses, past paper walkthroughs, revision plans and AI study tools for IGCSE, O Level and A Level subjects including chemistry, maths, economics…
Serves students worldwide preparing for IGCSE, O Level and A Level exams, particularly those seeking subject courses, revision support, past papers and crash plans for school-level qualifications.
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DistressedDistressed
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Computed from 5 filingsProvides a software platform for digital customer onboarding and compliance. Offers AI‑driven KYC, KYB and AML verification, identity document checks, risk scoring, monitoring, and workflow…
Serves compliance, risk, product and onboarding teams at regulated businesses, including fintech, banking, crypto, wealth and asset management, gambling, telecoms, legal services and luxury sectors.
Financial Health
StrongStrong
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Computed from 3 filingsProvides an online platform for creating and administering remote skills assessments for recruitment. Offers libraries of role‑specific tests, custom assessments, candidate invitations, remote…
Sells to B2B hiring teams, recruiters and HR leaders at growing and large organisations, with specific focus on call centres and technology employers assessing customer success, engineering and other…
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HealthyHealthy · 0% CAGR over 2y
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Computed from 3 filingsDevelops and provides a cloud-based platform for creating and managing standard operating procedures, methodologies and digital playbooks. Software includes knowledge management, task and project…
Serves B2B and public-sector organisations with structured project delivery needs, including infrastructure, rail, energy, financial services, consultancies, NHS trusts and universities, especially…
Financial Health
WeakWeak · 0% CAGR over 2y
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Provides a spend management platform that links corporate credit cards with software for tracking expenses, collecting receipts, processing invoices, and reconciling transactions. Includes budgeting…
Sells to finance teams, CFOs and operations leaders at businesses managing corporate card spend, expenses, invoices and multi-entity or cross-border operations, with integrations for ERP, HRIS and…
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Computed from 5 filingsDevelops an AI platform providing a collaborative workspace to interact with multiple language models and manage prompts and projects. Offers developer APIs for web scraping and search data for RAG…
Serves B2B customers worldwide, including developer teams, AI product builders, operations teams, and businesses using LLMs, web data, SEO, security, network and productivity workflows.
Financial Health
StrongStrong · Growing, Hiring · 19% CAGR over 4y
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Develops software platform for SMEs and investors that tracks financial performance, valuations and cap tables, automates administrative tasks, manages investor communications, and supports…
Serves SMEs and growth-company founders, their boards, and early investors seeking shared governance, valuation visibility and structured equity liquidity decision-making.
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Computed from 4 filingsDevelops and provides customer relationship management (CRM) and marketing automation software for real estate agents and teams, including contact management, email marketing, lead nurturing tools,…
Serves B2B real estate professionals, including individual agents, real estate teams, brokerages, and firms focused on agent recruiting.
Financial Health
WeakWeak · -19% CAGR over 3y
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How PostHog usage is detected
Company data
Detected companies are joined to UK Companies House records and XBRL accounts data. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Detection
Firmbase crawls the public website of actively-trading UK companies and fingerprints the technologies present: tracking scripts, embedded forms, chat widgets, CMS markers and similar signatures. A company is included in this list when one or more of the technology's signatures are found on its site; closely-related variants of the same product are grouped under one name. Detection covers what is visible on the public web — a company using the technology purely internally, with no website footprint, will not appear. Counts are therefore a conservative floor, not a ceiling. SaaS companies are identified using Firmbase's semantic classification of company activity, built from filings, websites and registered SIC codes rather than SIC codes alone. The detected counts and share figures on this page are computed within that sector cohort, so "share" always means share of SaaS companies with a detectable system — not of all UK companies.
Freshness
Websites are re-crawled on a rolling basis and the underlying company data is refreshed from Companies House continuously; filings appear within days of submission. The list and its statistics are regenerated when the detected cohort moves meaningfully. You can see the last-updated timestamp near the top of the page.
PostHog is a trademark of its respective owner. Firmbase is not affiliated with, sponsored by, or endorsed by the trademark owner.
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Frequently asked questions
How many UK SaaS companies use PostHog?
What share of UK SaaS companies run PostHog?
How is PostHog usage detected?
What size SaaS companies use PostHog in the UK?
What do PostHog-running SaaS companies also run?
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