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IoT Device Companies in Bristol: 28 Active Firms (2026)
IoT device companies in Bristol build internet-connected hardware, sensors and supporting platforms for the city's business, industrial and consumer markets.
Buying decisions tend to sit with operations, product, facilities and compliance teams rather than a purely software budget-holder. Bristol suppliers in this niche usually sell hardware-enabled outcomes: condition monitoring for industrial assets, connected controls for infrastructure and estates, embedded sensing for business products, or consumer devices with remote support attached. The engagement is rarely just a licence sale. Customers are buying design assurance, component sourcing, firmware maintenance, deployment logistics, security documentation and ongoing device-management support, often with pilot hardware moving into managed fleets. That makes the buyer profile more operational than pure SaaS, with procurement looking at service life, update policy and field support as much as application features.
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Bristol has 28 actively trading IoT device companies, making this a small, specialised local market rather than a broad manufacturing cluster. Reported headcount across the local cohort is 304 people, which points to lean engineering and operations teams rather than large factory footprints. The commercial centre of gravity is likely to be firms that combine product design, embedded development, supply-chain coordination and customer support, with only a minority operating at the revenue scale implied by mature hardware distribution. For researchers, Bristol reads as a targeted connected-device base: enough activity for buyer mapping, but narrow enough that individual account qualification will matter.
Consumer connectable products sold in the UK sit under the Product Security and Telecommunications Infrastructure Act and the related security requirements regulations. The practical burden falls across manufacturers, importers and distributors, so Bristol hardware businesses need evidence that password rules, vulnerability reporting routes and minimum security-update information are built into the go-to-market process. A Statement of Compliance matters commercially as well as legally: importers and distributors should not place relevant products on the market unless the statement accompanies the product. Enforcement sits with the Office for Product Safety and Standards, making product-security documentation part of channel readiness rather than a late compliance exercise.
Bristol’s connected-device cohort appears likely to remain engineering-led and relatively small, with scale-up scarcity shaped by the cost of hardware iteration, component risk and after-sales obligations. Buyers tend to reward suppliers that can keep devices supported through their service life, so security update policies and field support may become sharper qualification tests. Consolidation looks more plausible around capability gaps than around pure market share: design consultancies, distributors and platform operators each solve different parts of deployment. The firms that endure are likely to look less like app vendors and more like product businesses with recurring service layers.
28
Active firms
2026
2
Above £5M turnover
Bristol entries
1
Since 2022
New incorporation
Key facts
About 7% of the trading cohort reports turnover above £5M (2 of 28 firms) — the rest sits below that revenue band.
3% of the cohort was incorporated since 2022 (1 firms), so a sizeable share is in its first few filing cycles.
Consumer connectable products fall under the Product Security and Telecommunications Infrastructure Act 2022 and the 2023 security requirements regulations, in force from 29 April 2024.
Manufacturers, importers and distributors must address password controls, security-issue reporting and minimum security-update periods, with enforcement by the Office for Product Safety and Standards.
GOV.UK expected the UK IoT market to reach £24.74 billion by the end of 2024.
GOV.UK’s consumer-IoT work initially mapped 394 manufacturers of consumer connectable products and later examined 70 companies for public compliance evidence.
OECD digital-economy reporting puts IoT adoption among firms at 27% on average across measured economies, ranging from 6% to 53%.
Top Bristol IoT device companies
BEST ENERGY LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and manufactures IoT-based energy monitoring and management systems for commercial buildings and multi-site businesses. Provides hardware and software platforms that collect energy data,…
Serves B2B and institutional clients with multi-site buildings, including quick-service restaurants, food retailers, commercial estates, education providers, manufacturers and hotels worldwide.
Financial Health
StableStable · -61% CAGR over 4y
Location
Visulise Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides Internet of Things (IoT) systems for collecting and monitoring operational data. Supplies sensors, gateways and connectivity with cloud platforms and dashboards to capture, transmit and…
Serves B2B customers in agriculture, construction, utilities, retail and facilities/property management, especially organisations needing operational, environmental or occupancy data for compliance,…
Financial Health
StrongStrong · Growing · 0% CAGR over 2y
Location
ONE BIG CIRCLE LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops automated rail infrastructure monitoring technology. Provides the AIVR platform, which collects and analyses video and thermal imagery from trains using machine learning to identify track…
Serves rail infrastructure owners, operators and contractors, including public-sector bodies and engineering/maintenance teams responsible for UK rail networks.
Financial Health
HealthyHealthy · -56% CAGR over 4y
Location
LYTX EUROPE LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides video telematics and fleet management technology, including AI‑enabled dash cameras, driver safety monitoring, and analytics software. Systems capture and analyse vehicle video and driving…
Serves B2B organisations operating vehicle fleets, especially fleet safety and operations teams at large or global fleets, plus telematics service providers and reseller partners.
Financial Health
WeakWeak · 0% CAGR over 2y
Location
ALTERED CARBON LIMITED
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsDevelops graphene-based gas sensing technology and AI-enabled platforms that detect and interpret airborne chemical signals. Produces low‑power sensors and software for integration into electronics,…
Sells primarily to businesses and institutional buyers developing AI, robotics, and intelligent environments, including organisations in the built environment, healthcare, food and agriculture,…
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
EMPATHICA UK LIMITED
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDesigns and develops medical wearable devices, AI algorithms and software for remote patient monitoring and digital biomarkers. Provides platforms that collect physiological data for clinical…
Sells to researchers and clinicians, especially clinical trial teams and pharmaceutical companies using remote patient monitoring and digital biomarkers across therapeutic areas such as neurology and…
Financial Health
HealthyHealthy · -25% CAGR over 2y
Location
ATMO TECHNOLOGY LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops environmental and safety monitoring software that collects and analyses site data such as noise, dust and air quality. Uses IoT sensors, AI and automation to track pollutants, manage…
Serves operations, HSE and compliance teams at infrastructure, construction, rail, logistics and industrial businesses managing multi-site worksites and environmental obligations.
Financial Health
StrongStrong · Growing, Hiring · 47% CAGR over 4y
Location
Trajectory
4y · 2021–NowFinancial sub-scores
Computed from 4 filingsDevelops a smart menstrual cup with integrated biosensors that measure menstrual flow volume and usage. The device syncs with a mobile app to provide cycle data, flow metrics and insights to support…
Sells to consumers who menstruate, particularly people seeking reusable period products and data-driven menstrual health insights for tracking flow, cycle patterns and changes over time.
Financial Health
StrongStrong
Location
The Hamilton-Davies Group Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsSupplies enterprise mobility technology including mobile computers, barcode scanners, RFID, tablets and printers. Provides device management software, wireless network design and installation,…
Serves businesses and public sector organisations with mobile workforces, especially IT and operations teams in retail, warehousing, distribution, e-commerce fulfilment, healthcare, manufacturing,…
Financial Health
HealthyHealthy · 0% CAGR over 3y
Location
SAFE MOBILE SOLUTIONS LIMITED
Trajectory
4y · 2021–NowFinancial sub-scores
Computed from 4 filingsDevelops and supplies wireless communication and workforce management solutions, including push‑to‑talk and dispatch software, GPS fleet tracking, emergency alert devices, and video analytics…
Serves B2B and public-sector organizations with mobile workforces, including education, federal, state and local government, healthcare, hospitality, manufacturing, mining, petrochemical, public…
Financial Health
StrongStrong · Hiring · 82% CAGR over 3y
Location
ZERO POINT MOTION LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops high-precision inertial sensors and measurement units using silicon photonics to detect acceleration and rotation. Technology supports positioning and navigation systems for autonomous…
Serves B2B customers developing autonomous hardware, including drone, robotics, wheeled platform and wearable device manufacturers needing high-precision positioning and navigation components.
Financial Health
StrongStrong · Growing, Hiring · 52% CAGR over 4y
Location
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDevelops a mobile app and hardware light mask that use controlled flickering light sequences to guide meditation and altered‑consciousness sessions. Provides subscription access to guided audio…
Serves consumers seeking meditation, relaxation, sleep support and mental wellbeing tools, including mobile app users on iOS and Android and buyers of its Nova light mask for personal…
Financial Health
HealthyHealthy · Hiring · 57% CAGR over 4y
Location
Trajectory
5y · 2020–NowDevelops and supplies distributed acoustic sensing (DAS) and distributed fiber optic sensing (DFOS) systems. Provides ONYX hardware and software used to monitor infrastructure such as pipelines, rail…
Serves public-sector security agencies and infrastructure operators worldwide, including border authorities, national infrastructure owners, oil and gas pipeline firms, rail and road networks, mining…
Financial Health
Insufficient historyInsufficient history
Location
DATUMPIN LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops industrial data capture and edge computing technology for programmable logic controllers (PLCs). Provides embedded data memory hardware and software that collect, process and securely…
Serves B2B industrial equipment owners and operators using PLC-controlled manufacturing or process systems, including teams responsible for operations, asset performance, industrial data, and IT/OT…
Financial Health
HealthyHealthy · Hiring · 22% CAGR over 3y
Location
Sintela
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDevelops and supplies distributed acoustic sensing (DAS) and distributed fiber optic sensing (DFOS) systems and software that use fibre‑optic cables to detect vibration, strain and temperature for…
Serves government security agencies and industrial infrastructure operators worldwide, including border authorities, mining companies, oil and gas pipeline operators, rail and road networks, subsea…
Financial Health
StrongStrong · Hiring · 21% CAGR over 4y
Location
Sintela
Develops and supplies distributed acoustic sensing (DAS) and distributed fibre optic sensing systems, including ONYX hardware and software, used to monitor infrastructure such as pipelines, railways,…
Sells to B2B and public sector buyers in mining, oil and gas, rail, roads, power, subsea cable, geophysical monitoring, border security and national infrastructure, including operators,…
Financial Health
Insufficient historyInsufficient history
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops edge computing and networking infrastructure including edge servers, orchestration software, and connectivity platforms. Provides zero‑trust networking, wireless connectivity, and tools to…
Serves enterprises and operators with distributed sites, device fleets and edge workloads, including IT, network/security and operations teams evaluating multi-site deployments, pilots or full-scale…
Financial Health
WeakWeak · -8% CAGR over 4y
Location
SRT Marine
Develops and supplies maritime domain awareness technologies, including vessel tracking and surveillance systems for coastguards, fisheries authorities and ports, plus AIS and VHF transceivers and…
Serves government maritime agencies, coast guards, border and fisheries authorities, port and waterway operators, vessel monitoring bodies, OEM marine electronics manufacturers, and marine…
Location
AGM Technologies Limited
Trajectory
4y · 2021–NowFinancial sub-scores
Computed from 4 filingsDevelops and supplies vehicle telematics systems for fleet operators and insurance providers, including GPS tracking devices and software platforms that collect vehicle location and driving data for…
Serves B2B organisations in the global fleet and insurance markets, including vehicle fleet operators, insurers and businesses managing insured or commercial vehicles.
Financial Health
StableStable · Hiring · 11% CAGR over 4y
Location
BLUESKYTEC LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops hardware-based cybersecurity technology that secures industrial and control-system communications. Provides packet-level authentication, encryption and zero-trust enforcement devices that…
Targets defense agencies, critical infrastructure operators and industrial organisations running OT, control and edge systems in high-assurance or disconnected environments.
Financial Health
WeakWeak · Hiring · 12% CAGR over 4y
Location
2JB Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures strain gauge measurement and sensor instrumentation, including signal conditioners, wireless telemetry modules, sensor displays and control systems used with load cells,…
Serves B2B OEMs, engineering teams and technical distributors across sectors including agriculture, automotive/motorsport, civil engineering, construction, industrial processing, marine, medical,…
Financial Health
WeakWeak · 0% CAGR over 5y
Location
Foreshore Technology Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and supplies software, hardware and control systems for dredging and marine operations. Products include dredge monitoring and control platforms, hydrographic survey tools, and vessel systems…
Serves dredging contractors, port operators, marine aggregate firms and hydrographic survey teams worldwide, including vessel crews and project managers involved in marine and terrestrial dredging…
Financial Health
HealthyHealthy · -6% CAGR over 4y
Location
CHRONOLOGIC LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops workforce management and time‑and‑attendance systems, including cloud-based time tracking software, employee scheduling and absence management tools, and biometric or RFID clocking-in…
Serves businesses of all sizes with staff management needs, including retailers, manufacturers and other employers managing hourly or shift-based workforces, HR, operations and payroll teams.
Financial Health
StableStable · -1% CAGR over 4y
Location
IGNITEC LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides product design and development services including industrial design, electronics engineering, embedded software, prototyping and low‑volume manufacturing. Develops connected devices,…
Serves technology companies, universities, start-ups, scale-ups, SMEs and corporates in health tech, wearables, IoT, defence, life sciences, marine/subsea and environmental monitoring.
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 4y
Location
ANTILLION LTD
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDesigns and builds edge computing technology, including rugged edge servers (PACE) and orchestration software (LOEN) used to deploy, manage, and secure distributed IT systems and critical workloads…
Serves B2B customers running critical workloads in demanding or disconnected environments, including operational and technical teams needing secure, compliant, scalable systems at the edge.
Financial Health
StableStable · -78% CAGR over 3y
Location
Optect Ltd
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDevelops and commercialises long‑range IR3 flame detection systems using optical sensing technology. Devices detect small fires and flames at distance, including through smoke, and integrate with…
Serves B2B buyers and partners responsible for large-area fire safety, including asset owners in wildfire-prone areas, car park operators, facilities teams, insurers, and fire protection system…
Financial Health
HealthyHealthy · -5% CAGR over 4y
Location
Q.E.D. Advanced Systems Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and supplies meeting room and desk booking systems under the ResourceXpress platform, including scheduling software, mobile apps, kiosks and room display hardware that integrate with…
Serves businesses and other organisations with shared office space, targeting facilities, workplace and IT teams that manage meeting rooms, desks and huddle spaces, including customers in multiple…
Financial Health
StableStable · Hiring · 7% CAGR over 4y
Location
Calyo Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops 3D ultrasound sensing technology, including sensors and perception software for autonomous vehicles and robotics. Products generate near‑range 3D environmental data to support navigation and…
Serves OEMs, developers and integrators building autonomous mobility, robotics and ADAS systems, including automotive, logistics, agriculture, mining, maritime, security, healthcare and off-road…
Financial Health
HealthyHealthy · Hiring · 19% CAGR over 4y
Location
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDevelops and supplies swimming pool monitoring technology including RFID wristbands, docking stations, lane displays and web/app software that records swimmers’ lengths, distance and pace, uploads…
Sells to pool operators, leisure centres and swimming facilities seeking to engage recreational lap swimmers, with secondary use by individual swimmers of all ages and abilities through participating…
Financial Health
StableStable · -11% CAGR over 2y
Location
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How Bristol IoT device companies work and how to sell to them
What they do
Bristol IoT device suppliers usually monetise a blend of upfront hardware, paid design or integration work, and recurring service charges once devices are in the field. A typical sale may start as a paid pilot or engineering engagement, then move into unit pricing for devices, installation support, connectivity management, firmware maintenance and remote-monitoring subscriptions. Margins depend on component availability, certification effort, warranty exposure and how much support is bundled into the commercial model. Some firms operate closer to product manufacturing, while others behave more like engineering consultancies with retained support contracts attached to deployed fleets.
Who they sell to
Most customers are operational buyers rather than experimental technology teams: industrial operators, estates managers, infrastructure owners, equipment manufacturers, distributors and consumer-product teams with connected devices in their range. Day-to-day sponsors tend to be heads of operations, product directors, facilities leads, compliance managers and CTOs, with finance and procurement entering once pilots turn into fleet deployment. Sales cycles are usually longer than pure software because buyers want to test devices in real environments, check support obligations and understand failure modes. Direct sales are common, while larger infrastructure and public-sector opportunities often move through procurement exercises or delivery partners.
What they buy
Most Bristol IoT device firms tend to spend on services and systems that reduce delivery risk across hardware, software and field operations. Common needs include electronics design support, embedded development, firmware testing, penetration testing, certification advice, component sourcing, contract manufacturing, logistics and returns handling. Once devices are live, demand shifts towards cloud hosting, connectivity management, observability, fleet diagnostics, customer support tooling, field-service systems, billing, CRM and finance software. Legal, insurance, accounting and recruitment providers can also find openings where device makers are formalising supply agreements, product-security documentation, distributor terms or engineering hiring plans.
Why and how to sell to them
Commercial intent often appears when a device maker moves from prototype or pilot work into repeat deployments, adds channel partners, takes on regulated customers or hires around operations, compliance and customer support. Pain points tend to be practical: component shortages, delayed certification, unclear update policies, high support volumes, field failures, patch management and weak visibility over deployed devices. Outbound messaging usually works better when it ties to a concrete operating burden rather than a generic digital agenda. Useful angles include lowering warranty risk, reducing manual support work, improving audit evidence, shortening release cycles or helping small teams support devices across a longer service life.
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.
Sources
- Cyber security of consumer IoT: manufacturer survey
- The study initially mapped 394 manufacturers of consumer connectable products.
- Less than 10% of initially mapped manufacturers engaged in the research: 33 of 394.
- A desk research exercise examined a subset of 70 companies for publicly available compliance evidence.
Also in Bristol
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