IT Companies in London

OLIVE JAR DIGITAL

London

Olive Jar Digital is a UK digital consultancy supplying managed digital delivery services and specialist talent. Serving public and private sector clients, the London-based company delivers cloud computing, business intelligence, data analytics, software automation, and quality assurance services alongside individual digital consultants and full agile teams.

OLIVER BERNARD

London

Ometria

London

AI-powered customer data and marketing platform for retail brands.

Onalytica

London

Influencer marketing platform helping brands identify, manage and measure influencer relationships.

OneFibre

London

OneFibre delivers full fibre internet direct to commercial buildings across London. Serving office landlords, occupiers and workspace operators, it installs dedicated leased lines with speeds of up to 10Gb, alongside managed networks, business VoIP and structured cabling. Services include 24/7 network monitoring and unlimited bandwidth, with more than 400 connected buildings to date, among them White Collar Factory and the Asticus Building.

OneUptime

London

Open-source unified observability platform providing infrastructure monitoring, incident management, and status pages.

OneWeb

London

Low-Earth orbit satellite broadband constellation operator delivering global connectivity.

Onfido

London

Onfido, now part of Entrust Identity Verification Solutions, provides AI-powered biometrics and document intelligence to verify customer identities during onboarding and throughout the customer lifecycle. It serves organisations in financial services, healthcare, government, telecom, education and enterprise sectors seeking to prevent fraud, meet KYC and AML compliance requirements and secure high-risk transactions.

Open Climate Fix

London

Non-profit tech company using ML to forecast solar power generation for grid operators.

Open Medical

London

Cloud-based software for clinical workflow management and patient pathway optimisation across specialties.

OpenAI

London

OpenAI develops and deploys artificial intelligence research and products. ChatGPT provides conversational AI for consumers and business users, with applications spanning customer operations, marketing and financial analysis. The API Platform gives developers programmatic access to OpenAI's models. OpenAI publishes research in mathematics, theoretical computer science and AI safety. Enterprise customers including Virgin Atlantic and Zapier use the platform to automate workflows and improve business efficiency.

Opensee

London

Real-time analytics platform for capital markets firms handling large-scale trading and risk data.

OpsLevel UK

London

Developer portal and service catalogue platform helping engineering teams manage software ownership.

Opsyte

London

Hospitality management platform offering restaurant and bar analytics, rota management, HR and finance reporting.

Optigo

London

Optigo provides end-to-end group transportation management solutions for schools, health services and businesses, offering trip planning, passenger and customer portals, trip aggregation and route optimisation through its Movit and Optimit products. The company serves clients in the UK and Finland, supporting municipalities, hospitals, clinics and transport providers with tools for managing passenger profiles, trip creation and real-time tracking.

Optima Training Academy

London

Optima Training Academy provides IT certification training covering desktop support and IT fundamentals, cloud computing, cyber security and artificial intelligence. Courses include CompTIA A+, Network+ and Security+, AWS Cloud Training for Solutions Architect, Cloud Practitioner and Developer certifications, Microsoft Azure certification including AZ-900 and AZ-104, Google Cloud Platform courses, and cyber security training covering CySA+, ethical hacking, penetration testing and SOC analyst skills. The academy reports a 95 percent pass rate and offers weekend, evening, self-paced online and live virtual classroom formats with personalised mentoring.

OPTIMAL CITIES

London

Optimal Cities provides satellite intelligence and GeoAI tools to analyse, plan and monitor urban environments. Their solutions support housing development, public health risk assessment, environmental impact analysis, real estate valuation, smart city development, masterplanning, active travel, biodiversity gain, health impact assessment, site identification, urban morphology, healthy city planning, decarbonisation, infrastructure capacity and site assessment for planners, developers, public authorities and specialists globally.

Optimo Software

London

Fully integrated software platform for managing venues, events, facilities and resources.

OPTIMUS IT INFRA

London

Optimus IT Infra provides healthcare integration and interoperability support to UK healthcare organisations, including NHS trusts and private healthcare providers. The company offers managed services for high-frequency message processing environments involving multiple EPRs, LIS, RIS, and integration engines, with expertise in HL7 and FHIR integration, cloud migration, development, testing, and monitoring support.

Options Direct

London

Options Direct provides configuration, building and shipping of servers, storage and networking equipment worldwide, with specialist knowledge in low-latency HFT systems for capital markets. They offer end-to-end global IT logistics, integrated solutions with Tier 1 vendors, GPU-based systems for AI and ML, software-defined storage partnerships, and third-party support for remote hands and spares across client estates.

Optmyzr

London

PPC management and automation platform with AI tools for optimising Google Ads and paid search campaigns.

ORBIS PROTECT

London

Orbis Protect provides site security management, vacant property services, access control, and lone worker protection. The organisation serves businesses and entities across multiple sectors, including social housing, infrastructure and utilities, property and facilities management, and construction throughout the United Kingdom.

Orbital Witness

London

Orbital provides an AI platform for commercial real estate legal work, supporting law firms, real estate businesses, and occupiers. It helps legal and property teams understand assets, visualise property data, draft and negotiate documents, and coordinate deal parties to accelerate transactions and manage risk.

Orbrick Consulting

London

Orbrick Consulting provides Oracle Fusion implementation, application support and optimisation for enterprise customers. Its services cover ERP, HCM, supply chain, EPM and technology, including project assurance and AI integration.