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OTT Streaming Companies in London: 100+ Active Firms (2026)
OTT streaming companies in London deliver internet video, audio and platform services for media owners, advertisers and audiences across the capital.
Commercial demand tends to sit in several buying centres: broadcaster and rights-holder distribution, publisher and advertiser monetisation, telecoms and channel aggregation, and direct-to-consumer subscription or transactional offers. Buyers are usually media owners, producers, advertisers, telecoms providers and publishers rather than general-purpose corporate IT teams. Engagements range from managed-service carriage and content operations through to platform licensing, audience measurement, ad operations and payment flows. The better-fit operators look like lean media-technology businesses, with specialist product, engineering, licensing, advertising and commercial staff supporting recurring contracts or audience revenue, not project-based creative production work.
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London has 103 actively trading OTT streaming companies in this list, a small specialist cohort rather than a broad software category. Reported employment totals 1,165 people, so the footprint is visible but concentrated in lean operating teams. The commercial centre of gravity appears to sit around businesses that can combine rights handling, product delivery and monetisation rather than around pure content studios. A smaller revenue-scaled tail exists, but most of the cohort still reads as specialist operators selling to broadcasters, rights holders, publishers, advertisers and distribution partners from a London base.
Rights control shapes the operating context: an OTT service may need different clearances for live streams, archive catalogues, clips, music, advertising inventory and international distribution. Consumer-facing models also carry billing, cancellation, privacy, age-suitability and advertising-compliance work, while business-to-business platforms tend to face diligence from media-owner legal and procurement teams. Market structure is therefore contractual as much as technical. A London operator can look commercially close to a software vendor, a broadcaster services supplier or an advertising intermediary, depending on whether revenue comes from subscriptions, transactional access, ad-funded audiences or managed delivery.
Consolidation appears more likely around capability bundles than around audience scale alone. Buyers tend to prefer fewer operational hand-offs across encoding, distribution, rights, ad operations and reporting, which favours firms that can package services without losing sector-specific focus. At the same time, the cohort’s lean staffing profile suggests many operators remain exposed to project cycles and client concentration. Scale-up scarcity may persist where content rights or advertising relationships sit outside the platform owner’s control. The London base still helps with media, agency and rights-holder access, but pricing pressure from buyers is likely to keep business models fairly disciplined.
103
Active firms
2026
9
Above £5M
Revenue threshold
14
Newer incorporations
Since 2022
Key facts
About 8% of the trading cohort reports turnover above £5M (9 of 103 firms) — the rest sits below that revenue band.
13% of the cohort was incorporated since 2022 (14 firms), so a sizeable share is in its first few filing cycles.
London suppliers sit close to broadcasters, production clients, agencies and commercial buyers.
The sector spans video and audio streaming operators, advertising-funded media services, streaming platform providers and technical service businesses.
Rights ownership, outsourcing and platform licensing can make turnover a rough proxy for operating scale in OTT streaming.
Top London OTT streaming companies
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsProvides technology platforms for connected TV (CTV) distribution, advertising and monetisation. Offers tools for FAST channel distribution, contextual TV ad targeting, ad inventory monetisation, and…
Serves B2B customers in the connected TV ecosystem: advertisers, brands, agencies, streaming TV publishers, content owners, FAST channels and CTV platforms.
Financial Health
WeakWeak · -9% CAGR over 1y
Location
ATP Media Holdings Limited
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsManages global media rights and broadcast production for the ATP Tour. Produces live coverage of professional men’s tennis tournaments, distributes television and digital content to broadcasters…
Serves global television and digital broadcasters, media partners and ATP tournament stakeholders seeking men’s professional tennis rights, live coverage and related content for audiences worldwide.
Financial Health
StrongStrong
Location
NETGEM UK LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides a TV streaming platform and managed entertainment service for broadband and telecom providers, including content aggregation, channel distribution, set‑top TV services, and operational,…
Serves B2B broadband providers, ISPs and telecom operators seeking TV and entertainment propositions for their residential customer bases, including challenger fibre networks and larger…
Financial Health
StableStable · -91% CAGR over 2y
Location
Provides managed media services for broadcasters and content owners, including live signal delivery, channel playout, content preparation, video‑on‑demand distribution, OTT platform services, and…
Serves broadcasters, TV networks, media brands, publishers and rights-holders, including public service and commercial broadcasters, with audiences across live, linear, on-demand and OTT channels.
Location
Synapse TV Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops software platforms for delivering ad‑supported streaming television services, including FAST and AVOD channels. Provides server-side ad insertion, consent management, scheduling and playout…
Serves broadcasters, content owners and TV platform operators offering ad-supported streaming, catch-up or subscription services on free-to-air TV and mobile platforms.
Financial Health
StrongStrong · Hiring · 28% CAGR over 4y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides a platform-as-a-service for launching and managing video streaming services. Offers applications for multiple devices, content management tools, payment integration, analytics, and support…
Serves media companies, sports rights holders, broadcasters and other content owners with video libraries that want to launch and monetise direct-to-consumer streaming services globally.
Financial Health
StableStable · Hiring · 5% CAGR over 4y
Location
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProduces and distributes children's and family entertainment content, including animation and live‑action series. Operates digital studios and YouTube networks, manages audience distribution and…
Serves broadcasters, streaming platforms, digital media partners, advertisers and consumer-products licensees in kids’ and family entertainment, with children and families as end audiences.
Financial Health
StableStable
Location
MEDIA 16 LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides advertising sales and campaign services for connected TV platforms, selling CTV, OTT and VOD advertising inventory from FAST channels and publishers. Also offers campaign measurement,…
Serves B2B advertisers and media agencies seeking connected TV, OTT and VOD audiences, plus CTV publishers and TV channels needing sales representation or FAST platform distribution across major UK…
Financial Health
HealthyHealthy · Hiring · 43% CAGR over 3y
Location
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsProvides APIs and infrastructure for developers to integrate video into applications. Services include video encoding, hosting, live and on‑demand streaming, playback, thumbnail and clip generation,…
Sells to software developers and product/engineering teams at businesses building video into websites, digital platforms and AI workflows, including teams needing live or on-demand video…
Financial Health
WeakWeak · -9% CAGR over 1y
Location
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides broadcast technology and managed services for television channels, including linear and FAST playout, content preparation, satellite and IP delivery, compliance recording, and monitoring.…
Serves TV channel operators, international broadcasters and media rights owners across linear, FAST, OTT/VOD and social platforms, including independent channels and organisations moving from larger…
Financial Health
StableStable
Location
MEDIAHUB SERVICES LTD
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsDevelops and provides software platforms for IPTV and OTT television services, including tools for video transcoding, storage and delivery, live streaming, catch‑up TV and video‑on‑demand, with…
Serves B2B service providers and content owners launching or running IPTV/OTT TV services, including organisations needing multiscreen video delivery, apps, billing, payment and support integrations.
Financial Health
HealthyHealthy · Profitable, Hiring · 17% CAGR over 1y
Location
Operates a portfolio of international television channels and SVOD services, acquiring, curating and distributing drama, film and factual entertainment programming. Manages branded channels including…
Serves television viewers and streaming audiences worldwide, plus broadcasters, pay-TV operators and SVOD platforms seeking factual, drama, film and entertainment channel brands.
Location
Oz Racing Uk Ltd
Trajectory
3y · 2023–NowManages and distributes media, betting and data rights for horse racing events. Produces and broadcasts live race coverage and operates subscription channel Racing TV. Licenses official pre‑race and…
Sells to racecourses, betting operators, licensed betting offices, broadcasters, media companies and racing data users. Also serves horse racing fans through subscription viewing services, with an…
Financial Health
Insufficient historyInsufficient history
Location
APPLICASTER UK LTD
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops and provides a no‑code/low‑code SaaS platform for building and managing OTT streaming applications. Enables media companies and publishers to create, update and operate video apps across…
Serves B2B media and entertainment organisations, including broadcasters, sports rights holders, publishers, fitness and kids’ content brands, and OTT providers managing streaming businesses.
Financial Health
HealthyHealthy · -31% CAGR over 3y
Location
HELLENIC TELEVISION LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsOperates a Greek-language television channel broadcasting news, films, drama and entertainment programmes. Distributes content via Freeview, Roku and online streaming, produces original programmes,…
Serves Greek-speaking consumers, especially the Greek and Cypriot diaspora in the UK and worldwide, seeking Greek-language television content via Freeview, Roku and online channels.
Financial Health
WeakWeak · -23% CAGR over 2y
Location
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides cloud-based video hosting and streaming platform for businesses and media organizations. Tools support live and on‑demand delivery, video library management, player integration, analytics,…
Serves enterprises and media-led businesses, including broadcasters, publishers, media networks, entertainment firms, healthcare and pharma companies, retailers, tech companies and financial services…
Financial Health
WeakWeak · -3% CAGR over 3y
Location
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides cloud-based software and services for live video streaming, aggregation, distribution and capture using public cloud infrastructure such as AWS, enabling broadcasters and OTT platforms to…
Serves B2B media customers, including major broadcasters, OTT streaming platforms, sports rights holders and media companies with high-volume live event video operations.
Financial Health
StableStable · -8% CAGR over 4y
Location
Lounges.TV Ltd
Trajectory
4y · 2023–NowFinancial sub-scores
Computed from 4 filingsOperates an online platform for hosting and viewing pay‑per‑view live streams and on‑demand videos. Enables creators to broadcast events such as concerts, comedy shows, sports matches and talks, sell…
Serves creators, performers, event promoters, charities and sports organisers monetising live events, alongside consumers buying pay-per-view access to music, comedy, sports, education and…
Financial Health
StrongStrong · Hiring · 14% CAGR over 3y
Location
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsDevelops video compression, encoding and delivery software for broadcasters, OTT platforms and media companies. Provides solutions for video processing, packaging, cloud DVR, dynamic ad insertion,…
Serves B2B and public-sector customers in video and media, including broadcasters, OTT platforms, TV stations, content owners, network/service providers, sports/live event operators, government…
Financial Health
HealthyHealthy · Hiring · 10% CAGR over 1y
Location
The Garage Entertainment Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsOperates an online video streaming platform offering action and adventure sports films and television series, including surf, snow, skateboarding and motorsports content, accessible via web and…
Sells to consumers who stream action and adventure sports films and TV, including surf, snow, skate, motorsports, biking, climbing, endurance and outdoor enthusiasts.
Financial Health
StrongStrong · Growing, Hiring · 106% CAGR over 2y
Location
Operates a digital sports streaming platform that broadcasts live and on‑demand sporting events. Provides subscription video services, sports rights distribution, advertising, integrated betting and…
Serves a mixed market: sports fans worldwide as consumers/subscribers, plus B2B partners including sports rights holders, advertisers and distribution platforms seeking access to its sports audience.
Location
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsDevelops software for building and managing over‑the‑top (OTT) video streaming services, providing tools for app creation, content management, monetisation, analytics integrations, and deployment of…
Serves B2C streaming service operators, media companies and broadcasters, with hospitality businesses also addressed; customers range from brands running OTT services to enterprises needing global…
Financial Health
DistressedDistressed · -76% CAGR over 1y
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides a streaming television platform for businesses, offering ad-supported TV channels designed for venues such as bars, gyms, and waiting areas, with audio-optional programming including sports…
Targets businesses with customer-facing premises that use on-site TV screens, including venues where audio-optional, ad-supported programming is suitable for patrons, visitors or staff.
Financial Health
DistressedDistressed · -13% CAGR over 2y
Location
EVERYONE TV DEVICES LIMITED
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsOperates free-to-air television platforms including Freeview, Freesat and Freely, providing access to broadcast and streaming TV channels. Develops and supports TV platform technology and sells…
Serves UK households and TV viewers, alongside B2B partners including broadcasters, streaming services, device manufacturers and retailers in the UK television market.
Financial Health
StableStable · Profitable
Location
Red Media Sales UK London Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides digital TV advertising sales and campaign solutions for agencies and advertisers, placing non‑skippable ads across on‑demand TV channels within smart and connected TV apps, delivered via…
Targets media agencies, brand advertisers and client marketing teams seeking access to audiences on smart/connected TV and video-on-demand channel apps across TV, tablet, mobile and PC in the UK.
Financial Health
HealthyHealthy · Hiring · 22% CAGR over 4y
Location
GRABYO LIMITED
Trajectory
3y · 2024–NowFinancial sub-scores
Computed from 3 filingsProvides a cloud-based platform for producing, clipping, editing and distributing live video. Offers tools for multi‑platform streaming, remote production, highlight creation, and advertising…
Sells to enterprises and professional video teams that run live events, digital shows and real-time social clips for distribution across multiple online platforms.
Financial Health
DistressedDistressed · -2% CAGR over 1y
Location
Encompass Digital Media
Provides managed media services for broadcasters, networks and content owners, including video acquisition, processing and global distribution. Offers broadcast playout, cloud-based media management,…
Serves B2B media and public-sector customers, including TV and radio broadcasters, television networks, sports leagues, OTT platforms, content owners, distributors, live event operators and…
Location
Diversity Media Sales Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsRepresents connected‑TV (CTV) publishers and sells advertising inventory to brands and media agencies. Connects advertisers with streaming audiences across niche, community-focused and family…
Serves brands, advertisers and media agencies seeking CTV and streaming audiences, alongside CTV-first publishers including niche community, minority-owned, children’s and mainstream content channels.
Financial Health
StrongStrong · Growing, Hiring · 60% CAGR over 4y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides an online video platform for businesses to stream live events and host on‑demand video. Offers video hosting, content management, HTML5 player delivery via CDN, APIs, analytics, and tools…
Serves businesses, media and entertainment companies, sports organisations, event production agencies, churches, nonprofits, education providers, governments, and developers needing online video…
Financial Health
StableStable · -46% CAGR over 4y
Location
VISIONOVER LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides audio and video streaming and distribution services, including licensed music and video content for TV, mobile, web, and in‑car platforms. Also offers radio broadcasting, karaoke and music…
Serves advertisers, retailers and other businesses, plus TV, mobile, automotive and web platforms. Also sells subscriptions and entertainment products to consumers worldwide.
Financial Health
WeakWeak
Location
WIZEWORX MEDIA LIMITED
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsProduces and commissions television and digital video programming for the ManotoTV channel, including news segments, podcasts, and studio shows. Distributes content via satellite broadcasting and…
Serves global consumers watching TV and online video via satellite and YouTube, and sells advertising and sponsorship to brands seeking to reach large regional and international audiences.
Financial Health
DistressedDistressed · 0% CAGR over 1y
Location
Racecourse Media
Manages and commercialises media, broadcast, betting, and data rights for horse racing events. Produces and distributes live racing coverage via television and digital platforms, and licenses…
Serves racecourse partners and targets B2B buyers in betting, broadcast and sports media worldwide, including licensed betting offices, bookmakers, broadcasters, data users and analysts, plus racing…
Location
Operates a subscription mobile and TV app providing preschool children with educational videos, games, books and songs. The platform offers ad‑free curated content, downloadable viewing, limited…
Sells to parents and caregivers of preschool children seeking ad-free, age-appropriate educational entertainment across devices, with content aligned to early years learning.
Location
Accedo UK Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops software and provides consulting and managed services for OTT and video streaming platforms, including TV, mobile and web applications. Services include OTT strategy, UX design, app…
Sells to B2B media and entertainment organisations, especially video businesses such as pay TV operators, sports broadcasters, content owners and publishers seeking multi-screen OTT and streaming…
Financial Health
StrongStrong · Hiring · 7% CAGR over 4y
Location
Operates an online subscription video‑on‑demand platform providing streaming access to television series, films, and live sports content, including Premier League matches, with digital subscription…
Serves consumers in 44 African markets, including viewers of series, movies and Premier League football who buy subscription plans or vouchers.
Location
Operates television broadcasting channels and an online streaming platform offering live TV and on‑demand programmes, including entertainment, drama and documentaries, with content from its own…
Serves consumers seeking online streaming and live TV, including viewers of entertainment, drama and international series programming.
Location
Strategy & Technology Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops software and systems for digital television broadcasting and streaming. Products include transport stream broadcasting and monitoring tools, DVB and ATSC solutions, OTT video delivery…
Serves TV broadcasters, cable operators, OTT/FAST channel providers and digital TV platform operators, including teams managing DVB, HbbTV, ATSC 3.0, transport-stream, monitoring and targeted…
Financial Health
StableStable · -8% CAGR over 4y
Location
Develops software platforms for television providers that integrate broadcast channels, streaming apps and on‑demand content into a unified interface. Technology powers set‑top boxes and smart TVs…
Serves B2B TV platforms and device manufacturers, including pay-TV operators, broadcasters and smart TV brands. Targets partners needing TV discovery and viewing software, while its end audience is…
Location
AMC INTERNATIONAL LIMITED
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsOperates television channels and subscription streaming services, commissioning, acquiring and distributing TV series, films, documentaries and reality programming. Manages brands including AMC,…
Serves consumers and streaming subscribers, plus advertisers and TV distribution partners, across entertainment audiences for drama, documentaries, lifestyle, film and reality programming.
Financial Health
StableStable · 0% CAGR over 2y
Location
Broadcasts and distributes television channels and streaming services featuring drama, documentaries, films and lifestyle programming. Operates and manages branded networks and digital platforms, and…
Serves both consumers and businesses: TV viewers and streaming subscribers for genre-based entertainment brands, plus advertisers and distribution partners buying access to thematic television…
Location
Sound Out Loud Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsOperates an online audio streaming platform that allows users to upload, distribute, and stream music and other audio content. Provides tools for artists, bands, DJs, and creators to share tracks and…
Serves consumers who stream music and audio online, alongside artists, bands, DJs and other audio creators who publish and share tracks with an online community.
Financial Health
WeakWeak · 0% CAGR over 3y
Location
RTL Adalliance
Provides advertising sales and ad technology services connecting brands with European media publishers. Enables video and TV advertising campaigns across broadcaster and streaming platforms, offering…
Serves B2B advertisers, agencies and brands—international and local—seeking European audiences, alongside premium content publishers needing advertising sales, adtech and addressable TV support.
Location
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDevelops and operates an online platform for live audio broadcasting. Users can stream audio from desktop or mobile, host recorded broadcasts, distribute streams via embedded players or links, and…
Sells to businesses, organisations and independent creators needing live audio broadcasting, including sports teams, event organisers, faith groups, podcasters, educators, radio stations and media…
Financial Health
DistressedDistressed · -16% CAGR over 4y
Location
Racecourse Media Group
Manages and distributes media, broadcast, betting, and data rights for horse racing events. Produces live race coverage and digital content, and licenses official pre‑race and race‑day data to…
Serves UK racecourses, betting operators, broadcasters, media companies, analysts and horse-racing fans, with international betting and broadcast partners across many territories.
Location
ESL FACEIT GROUP LIMITED
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsOperates esports competitions and online competitive gaming platforms, organising tournaments and leagues for multiplayer games. Provides event production, broadcasting, community platforms, and…
Serves global gamers, esports players, fans and creators, alongside B2B partners including game developers, publishers, media companies, advertisers and consumer brands seeking to reach gaming…
Financial Health
StrongStrong · Hiring · 67% CAGR over 1y
Location
WORLD OF WONDER LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProduces television series, documentaries and scripted content, including the RuPaul’s Drag Race franchise. Operates the WOW Presents Plus streaming service, and develops live events, conventions and…
Serves entertainment consumers, especially fans of drag, LGBTQ+ culture and unscripted/documentary programming, through streaming and live events; also targets broadcasters and platforms seeking TV,…
Financial Health
StableStable · -55% CAGR over 4y
Location
Trajectory
4y · 2021–NowFinancial sub-scores
Computed from 4 filingsDevelops and operates edge cloud and content delivery network technology that enables telecom operators and media providers to distribute video, software and application content through distributed…
Serves B2B digital content and application publishers, including OTT media, gaming and software companies, plus telecom operators, ISPs and service providers seeking edge delivery partnerships.
Financial Health
StrongStrong · Hiring · 36% CAGR over 3y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops OTT video streaming software that enables broadcasters, content owners, and organisations to distribute live and on‑demand video across web and mobile platforms, with tools for app…
Sells to broadcasters, media companies, content owners, influencers and smaller organisations seeking to monetise and distribute premium video to digital audiences across devices.
Financial Health
StrongStrong
Location
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsDevelops SaaS software for media companies to plan, manage and schedule video content across linear TV, FAST and VOD platforms. Provides tools for content strategy and budgeting, title and metadata…
Serves B2B media and entertainment organisations, including broadcasters, FAST and VOD channels, cable networks, telcos, OTT platforms, sports networks, studios and production houses.
Financial Health
StableStable · Hiring · 27% CAGR over 4y
Location
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How London OTT streaming companies work and how to sell to them
What they do
Revenue usually comes from recurring platform fees, managed-service retainers, advertising operations, revenue shares, carriage fees, subscriptions or transactional access. London OTT streaming firms often sit between software and media operations: they handle content ingestion, encoding, rights windows, user access, payments, advertising inventory and reporting rather than simply building a generic video app. Pricing tends to follow usage, audience volume, channel count, catalogue size or managed operational scope. Gross margin depends heavily on whether the firm owns the audience relationship, controls media rights, or mainly provides technical and operational services for another media owner.
Who they sell to
Buyers are normally broadcasters, rights holders, publishers, telecoms groups, advertisers, agencies and specialist media distributors. Senior sponsors tend to be chief commercial officers, heads of digital, product directors, CTOs, content operations leads, ad operations teams and procurement, with legal involved where rights and consumer terms matter. Smaller publisher tools may sell through direct outreach or self-serve onboarding, while broadcaster, telecoms and rights-holder deals usually need a consultative sale, pilot usage, security review and contract negotiation. RFPs are common where the buyer is replacing a legacy video stack or outsourcing channel operations.
What they buy
Spend tends to concentrate on cloud infrastructure, content delivery, encoding, storage, monitoring, security, identity, subscription billing, payments, CRM, customer support, analytics, consent management and advertising operations. Rights-heavy firms also need legal advice, contract management, royalty reporting and finance workflows that can cope with multiple territories, windows and revenue-share arrangements. Lean teams often outsource specialist engineering, QA, localisation, design, performance marketing, search, recruitment and finance support. Sellers with relevant category fit should expect technical buyers to ask about uptime, latency, reporting accuracy, integration effort, cost control and the operational burden on small product teams.
Why and how to sell to them
Buying intent often appears when OTT operators launch new channels, add advertising-funded tiers, expand into new territories, change rights packages, move away from agency-built platforms, or try to reduce delivery costs after audience growth. Leadership hires in product, engineering, commercial or ad operations can also reset the vendor list. Useful outbound angles tend to be operationally specific: fewer hand-offs across content workflows, clearer cost per stream, cleaner subscriber billing, better ad-fill reporting, faster partner onboarding, or less manual work around rights and finance. Generic digital-transformation language is a poor fit; these buyers usually respond better to sector fluency and proof of low integration friction.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. 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.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
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