IT Companies in London

Hardian Health

London

Software and AI medical device consultancy that has helped over 100 companies bring regulated products to market.

HARNHAM SEARCH AND SELECTION

London

Rockborne provides talent solutions for data and AI teams through its Attract, Train, Deploy model, which sources, trains, and embeds high-potential consultants into client organisations. It also delivers bespoke Data & AI training and project-based analytics and AI solutions, aiming to upskill teams and build long-term capability.

HARTLEY MCMASTER

London

Hartley McMaster is an independent management consultancy specialising in the use of analytical and structured methods to solve business problems. They provide data science and analytics consultancy services, including data analysis, business intelligence, data automation, and training for in-house teams, serving organisations seeking to make smarter decisions with data.

Hastee

London

Financial wellbeing platform providing employees on-demand access to their earned wages.

HCRG WORKFORCE SOLUTIONS

London

HCRG Workforce Solutions provides bespoke workforce solutions for NHS trusts, local authorities and healthcare providers, focusing on sustainable staffing, cost reduction and improved resilience. With over 20 years’ experience in healthcare recruitment, they offer managed staff bank services, international permanent recruitment and recruitment process outsourcing, supporting roles across doctors, nursing, mental health, allied health, social work and administrative functions.

HELICON HEALTH

London

Helicon Health is a medical technology development company and NHS-focused contract research partner that develops standards for electronic health records and interoperability, delivers remote monitoring and virtual ward solutions, and provides eLearning for anticoagulation and stroke prevention. It serves researchers, innovators, healthcare professionals, and patients requiring shared care at home across primary and acute settings for conditions including cardiovascular disease, asthma, COPD, diabetes, and frailty.

HELLO LAMP POST

London

Hello Lamp Post creates AI-powered Digital Assistants, known as Digital Team Members, to help public sector organisations automate customer service, provide information, collect feedback and engage audiences 24/7. The company serves airports, local, central and state government, universities and other public sector sectors through QR code signs and chat interfaces that require no downloads.

help4IT

London

Help4IT is a London-based IT support company providing managed IT services, cloud solutions, cybersecurity, and consultancy to small and medium-sized businesses across the UK. They specialise in Microsoft 365, Linux, and macOS environments, offering 24/7 support and acting as an outsourced IT department since 2005.

Helpdesk Heroes

London

HelpDesk Heroes is a London-based IT services company providing managed IT support, cybersecurity and cloud solutions to businesses.

Hepapi

London

Hepapi delivers DevOps, software QA, application modernisation and enterprise AI services, and has operated since 2018. The company is an AWS Advanced Tier Services Partner, providing cloud solutions that it states achieve up to 70 percent faster software deployment through automated CI/CD pipelines and a 99.9 percent defect detection rate through its testing approach. Hepapi also reports a 40 percent reduction in cloud costs through AWS optimisation, an 85 percent improvement in application reliability through Kubernetes solutions, and a 95 percent reduction in security risk through DevSecOps practices. Its clients include Figopara and Digiturk.

HIPPO LABS

London

Hippo Labs provides an automated patient recall platform for NHS primary care practices, integrating with EMIS Web and SystmOne to identify patients needing action, deliver proactive communication via SMS, email, WhatsApp or NHS App, and track outcomes to support QOF targets and public health campaigns.

HITACHI SOLUTIONS EUROPE

London

Hitachi Solutions designs, delivers and optimises Microsoft solutions including AI, data platforms, business applications and cloud services to address real business challenges. It serves organisations across industries such as construction, financial services, healthcare, manufacturing and retail, combining technical expertise with operational insight to support growth, transformation and customer experience initiatives.

Hive Learning

London

AI-powered skills academy platform reshaping corporate learning and talent development for enterprises.

HM3 CONSULTING

London

HM3 provides strategic advisory services to organisations. The firm assists clients by aligning strategy, architecture, governance, and delivery to support business transformation. Its services include conducting situation appraisals designed to evaluate current positions, identify operational misalignments, avoid unnecessary risks, and prioritize high-impact initiatives before investment decisions are made.

Hokodo

London

B2B buy-now-pay-later and trade credit platform enabling merchants to offer payment terms to business customers.

HOME CONNECTIONS LETTINGS

London

Home Connections designs integrated IT systems, housing software, and digital services for social housing providers, including local authorities and housing associations. Its solutions assist clients with managing property allocations, managing homelessness cases, meeting statutory duties, and expanding housing options through a national mobility scheme.

HOMELESS LINK

London

Homeless Link is the national membership charity for organisations working directly with people who become homeless in England. The organisation works to improve services and campaigns for policy changes to help end homelessness. It provides its members with professional support, networks, training, and access to sector guidance, news, and information services.

Homesearch

London

Property data and prospecting platform helping estate agents identify and target potential vendors.

Honeycomb UK

London

Observability platform purpose-built for distributed systems, enabling fast debugging through high-cardinality event data.

HOOKFLASH

London

Hoptroff

London

Hoptroff provides IEEE 1588 precision time protocol and NTP/PTP time synchronisation services for businesses requiring compliant, traceable timekeeping. Products include Traceable Time as a Service (TTaaS), Certified Time and Terrestrial Time Feed, covering different accuracy levels and deployment models. Hoptroff has partnered with LSEG to deliver resilient precision timing for financial markets, with Viasat for encrypted Ka-band satellite timing resilience, and with IBM for cloud-based time synchronisation. The company also holds a US Department of Transportation contract for GPS resiliency testing.

HORI SYSTEMS

London

Hori Systems helps organisations collect, process and integrate data by turning it into actionable insights at scale. The company creates high-quality products and services for customers, big and small, focusing on performance, security and reliability. It is a globally trusted data provider registered in England and Wales.

HOSTKEY UK

London

Hostkey provides dedicated and cloud infrastructure hosting services based in ultra-modern data centres to corporate and private clients. The company offers dedicated servers, GPU servers for AI and HPC, VPS solutions, colocation, and managed services across Europe, the USA and Turkey, with a focus on high-performance and customizable solutions.

HSI HANDSHQ

London

HandsHQ provides software solutions for risk assessment and training management, including RAMS creation, training register tracking, and risk reporting tools. It serves organisations in civil engineering, construction, defence, environmental services, events, facilities management, fit out, mechanical and electrical, telecommunications, and temperature control and HVAC sectors.