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Space Tech Companies in London: 40 Active Firms (2026)
Space tech companies in London build satellite, sensing and orbital data technologies for commercial, defence and research markets.
Buying centres cluster around satellite applications, geospatial and sensing outputs, mission-support software, communications and specialist engineering, rather than generic IT services. Customers are a mixed set: commercial infrastructure operators, defence and public-sector buyers, research groups and lower-mid-market technology partners. Engagements tend to be lumpy: paid pilots, integration work, data-service subscriptions and engineering contracts, with technical validation before broader deployment. The sales motion is therefore closer to consultative enterprise software and applied engineering than to high-volume self-service tooling, even where the product is delivered as software.
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London's cohort is compact: 40 actively trading space tech companies sit in the capital, with reported headcount totalling 148 people. That employment footprint points to specialist teams rather than large production organisations, and fits a market where many suppliers sell into public-sector, defence, research and infrastructure channels before building repeatable commercial volumes. Hardware-adjacent work also matters; engineering, sensing and mission-support activities tend to require longer validation cycles than generic digital services, which can keep companies lean while they prove use cases.
Activity-specific permissions shape the operating context for space-enabled suppliers. Satellite communications, remote sensing, launch support, mission operations and defence-related work each bring due-diligence questions around spectrum use, orbital safety, export-controlled components, information security and end-customer eligibility. London suppliers often sit downstream of the physical mission, selling geospatial analysis, software, mapping or mission-support capability into larger prime, infrastructure or research programmes. That structure can lengthen sales cycles and create evidence requirements that look closer to defence and infrastructure procurement than ordinary SaaS.
Early-commercial weight appears to shape the next phase of the London space tech cohort. Downstream analytics and mapping suppliers tend to commercialise faster than hardware-adjacent engineering businesses, but they can face sharper substitution risk if buyers treat outputs as interchangeable data layers. Defence and infrastructure demand favours firms that can document reliability, security and integration depth, while research-linked work can keep pipelines project-based. Consolidation may come through partnerships and supplier absorption rather than consumer-style land grabs. More durable positions are likely to come from repeatable services built out of bespoke mission work or geospatial analysis.
40
Active firms
2026
2
Above £5M
reported revenue
13
Since 2022
incorporated firms
Key facts
About 5% of the trading cohort reports turnover above £5M (2 of 40 firms) — the rest sits below that revenue band.
32% of the cohort was incorporated since 2022 (13 firms), so a sizeable share is in its first few filing cycles.
Space technology procurement in London spans earth observation, communications, navigation and analytics, so buyer conversations often sit outside launch services.
The London market tends to split between satellite-adjacent technology providers, sensing businesses and orbital-data companies.
Commercial users generally buy analytics, defence customers prioritise resilient systems, and research organisations work with space-derived information.
Top London space tech companies
LUNASA LTD.
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops space technology and orbital platforms enabling autonomous rendezvous and proximity operations. Provides satellite payload hosting and in‑orbit testbed services, and develops systems for…
Serves satellite operators, spacecraft manufacturers, space robotics and refuelling mission teams, space station cargo and exploration programmes, and public-sector space agencies developing in-orbit…
Financial Health
WeakWeak · Hiring · 108% CAGR over 3y
Location
CLEARSPACE TODAY LTD
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops in‑orbit services for the space industry, including robotic spacecraft for satellite servicing, refurbishment, and removal of space debris. Works with space agencies and industry partners on…
Serves space agencies, satellite operators and other space-industry organisations needing in-orbit servicing, debris removal and sustainable orbital operations, including public-sector and commercial…
Financial Health
StableStable · -60% CAGR over 3y
Location
Archangel Lightworks Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops laser-based satellite communication systems that link space networks with terrestrial networks. Designs and supplies optical ground stations, including deployable units, enabling…
Sells to cloud providers, telecom/network operators and governments needing secure, high-volume connectivity between satellite networks and terrestrial infrastructure, including areas with limited or…
Financial Health
StableStable · Hiring · 87% CAGR over 2y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and manufactures orbital transfer vehicles and spacecraft systems, and provides satellite launch deployment, in‑orbit transportation, hosted payload operations, mission control software, and…
Serves satellite operators, spacecraft manufacturers, payload developers and institutional space organisations in traditional and new space markets.
Financial Health
StableStable · Hiring · 25% CAGR over 4y
Location
Transfinite Systems Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops radio spectrum management and radiocommunication modelling software, including the Visualyse suite for interference analysis, satellite coordination and regulatory studies. Also provides…
Serves governments, telecoms and satellite regulators, radio equipment manufacturers, network and satellite operators, and specialist consultancies worldwide.
Financial Health
StableStable · 0% CAGR over 2y
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops satellite‑based AI software for remote inspection and monitoring of infrastructure. Provides applications for vegetation management around power lines, pipeline and asset monitoring,…
Serves enterprise operators of geographically distributed critical infrastructure, including electric, gas, water and wastewater utilities, energy, mining and transportation companies, with buyers…
Financial Health
StrongStrong · Growing, Hiring · 100% CAGR over 2y
Location
Blue Skies Space Ltd
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDevelops and operates small space science satellites equipped with telescopes and spectrometers, collecting astronomical and planetary data. Provides researchers subscription-based access to…
Serves academic and institutional researchers worldwide, especially space and Earth science teams studying stars, exoplanets, solar system bodies and related astronomy topics.
Financial Health
StrongStrong · Hiring · 7% CAGR over 5y
Location
Lodestar Space Ltd
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsDevelops autonomous AI control systems for defence satellites, including software for in‑orbit bodyguard spacecraft that monitor, inspect and protect high‑value satellites. Technology supports…
Serves defence and national-security organisations responsible for high-value US and allied space assets, including operators of critical satellites and orbital infrastructure.
Financial Health
HealthyHealthy · Hiring · 199% CAGR over 1y
Location
EXOBOTICS LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops hardware for small spacecraft and space missions, including components and systems intended for use in Earth orbit and beyond, and provides related engineering and mission support services…
Serves space-sector organisations developing small spacecraft and missions in Earth orbit and beyond, including commercial aerospace customers and mission teams needing spacecraft hardware.
Financial Health
HealthyHealthy
Location
Sd Direct Ltd
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsProvides satellite communications and connectivity services for aviation, government, and land or maritime operations. Supplies aircraft antenna systems, cabin routers, and network services, and…
Serves military, government and civilian public-sector organisations, including defence agencies, head-of-state aircraft operators, UAV programmes and emergency or public service teams.
Financial Health
DistressedDistressed · 0% CAGR over 1y
Location
EARTH-I LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides geospatial analytics and consultancy using Earth observation satellite data. Combines multi‑source imagery with AI and data processing to deliver insights, data products, and monitoring…
Sells to businesses and government bodies needing geospatial intelligence, including buyers in metals and minerals, agriculture, defence, security, infrastructure and mapping, plus public sector…
Financial Health
DistressedDistressed · -20% CAGR over 2y
Location
All Space Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops satellite communication terminals and software that enable devices and vehicles to connect simultaneously to multiple satellite and cellular networks. Provides multi‑orbit SATCOM hardware…
Serves defense and government organisations, including military and public-sector teams operating critical land, sea and air missions. Also addresses commercial mobility customers needing resilient…
Financial Health
StableStable · 0% CAGR over 3y
Location
ICEYE INFORMATION SOLUTIONS UK LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides synthetic aperture radar (SAR) satellite imagery and Earth observation data. Offers tasking APIs, analytics, and derived datasets used for disaster monitoring, insurance risk assessment,…
Serves government, defence and intelligence agencies, plus insurers, banks, utilities and energy operators needing satellite-based risk, disaster and infrastructure intelligence.
Financial Health
StableStable · -56% CAGR over 4y
Location
Lemu Global Limited
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsDevelops environmental data and analytics platforms that use satellite imagery, ecological datasets and AI to measure biodiversity, carbon and ecosystem indicators, helping organisations monitor…
Serves companies, governments and community organisations that need nature and biodiversity intelligence for land, ecosystem, compliance or conservation decisions across landscapes.
Financial Health
HealthyHealthy · 0% CAGR over 1y
Location
CHARTXR SPACE TECHNOLOGIES LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
WeakWeak · Hiring · 41% CAGR over 2y
Location
EUROPEAN ENGINEERING & CONSULTANCY LIMITED
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides engineering consultancy, design and manufacturing of RF and microwave electronic hardware for aerospace, scientific and industrial applications. Develops products such as switch matrices,…
Serves B2B customers in space, aerospace, high-technology science, defence and industrial markets, including organisations needing specialist RF, microwave and electronic engineering support for…
Financial Health
HealthyHealthy · Growing, Hiring · 7% CAGR over 2y
Location
RHEA GROUP LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides engineering and technical services for space and security sectors, including space systems engineering, ground and mission operations support, cybersecurity, security operations centres, and…
Serves institutional and commercial organisations in space, defence/security and mission-critical engineering, including space agencies, satellite operators, infrastructure owners and teams needing…
Financial Health
StrongStrong · Growing, Hiring · 5% CAGR over 5y
Location
Messium Ltd
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsProvides satellite-based crop analysis for wheat farms, measuring nitrogen concentration and biomass and generating fertiliser application recommendations. Uses remote sensing and modelling to…
Sells to wheat farmers and farm businesses needing nitrogen analysis and fertiliser guidance for their crops. Targets agricultural users seeking tailored monitoring, trials, and recommendations for…
Financial Health
WeakWeak · Hiring · 60% CAGR over 1y
Location
Sen Corporation Limited
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsDevelops and operates a video streaming platform broadcasting real-time 4K footage of Earth and space from cameras on spacecraft. Distributes live channels via apps and TV platforms and licenses…
Serves consumers interested in live space and Earth viewing via apps, YouTube and FAST TV, and licenses footage to news and weather media organisations, including broadcasters and publishers through…
Financial Health
StableStable · Hiring · 12% CAGR over 4y
Location
COMMERCIAL SPACE TECHNOLOGIES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides consultancy, management and launch brokerage services to the space industry. Produces technical and market reports, performs trajectory analysis, and connects satellite operators with launch…
Serves B2B and public-sector space markets, including satellite operators, upstream and downstream space companies, insurance and legal service providers, space agencies, and new entrants to the…
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
CES ADVANCED COMPOSITES UK LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, develops and manufactures advanced composite components and assemblies for aerospace and defence applications, including cabin interior parts, aerostructures, UAV and satellite structures,…
Serves aerospace, defence and space-sector organisations, including aircraft cabin and aerostructure manufacturers, UAV developers, satellite programmes and defence contractors.
Financial Health
StableStable · Hiring · 35% CAGR over 4y
Location
Overview Orbital Limited
Trajectory
3y · 2021–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
StableStable
Location
Rocket Engineering Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · 0% CAGR over 4y
Location
EARTH & SPACE SUSTAINABILITY INITIATIVE
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
WeakWeak
Location
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How London space tech companies work and how to sell to them
What they do
Revenue usually arrives through a mix of engineering contracts, integration fees, software licences and recurring access to space-enabled data services. London space tech firms often package technical capability around a narrow operational problem: monitoring assets, modelling environmental conditions, supporting mission planning, improving connectivity or interpreting sensor outputs. Early engagements tend to be paid trials or scoped projects rather than low-friction subscriptions, because buyers need to test accuracy, reliability and integration with existing systems. Where recurring revenue exists, it is usually tied to usage, seats, service levels or access to analysis workflows, with services work sitting alongside the product until deployment patterns become repeatable.
Who they sell to
Most sell to technical and operational buyers rather than broad departmental users. Typical sponsors include CTOs, heads of engineering, geospatial leads, programme managers, defence commercial teams, infrastructure operators and research directors, with finance and procurement joining once a pilot moves towards production. Public-sector and defence routes often involve frameworks, grant-linked programmes or RFPs; commercial infrastructure buyers are more likely to use direct procurement after a technical trial. Contract values vary because some purchases are narrow software subscriptions while others include integration, security review, engineering support and access to specialist analysis. Sales cycles tend to lengthen where orbital, spectrum, export-control or security questions sit in the background.
What they buy
Most space tech firms tend to spend on tools that help small technical teams prove reliability, protect sensitive work and turn specialist outputs into repeatable products. Common needs include cloud infrastructure, geospatial processing, observability, cybersecurity, device and telemetry management, technical documentation, CRM, billing, bid management, finance systems and project accounting. Hardware-adjacent suppliers may also need test facilities, simulation tools, electronics support, manufacturing partners and quality-management advice. Services spend often clusters around grant writing, public-sector tendering, export-control advice, insurance, intellectual-property work, specialist recruitment and marketing that can explain technical claims without overstating them. Suppliers selling into this market need to show how they reduce delivery risk, not just administrative effort.
Why and how to sell to them
Space tech buyers tend to evaluate vendors when a pilot becomes a production deployment, a public-sector bid is live, a defence or infrastructure customer asks for security evidence, or a technical team starts hiring beyond the founding group. Incorporation since 2022 also matters as a signal: London has a sizeable newer cohort that may still be building finance, sales and delivery processes around project revenue. Useful outbound angles are usually specific to bottlenecks: shortening procurement evidence cycles, improving traceability, reducing manual analysis, managing project margins or preparing for regulated customers. Generic scale-up messaging is less likely to land than proof that a vendor understands technical validation and long procurement paths.
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.
Also in London
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