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Top IT Companies in Belfast (122)

Accelerite
Big Data • eCommerce • Information Technology • Internet of Things • Software • Analytics
Belfast
24 Employees

Accelerite is a Silicon Valley based company delivering secure business-critical infrastructure software for Global 1000 enterprises. Accelerite's product suite includes hybrid cloud infrastructure, endpoint security, risk-based authentication, big data analytics, and the Internet of Things. Accelerite is a wholly owned business of Persistent Systems (BSE & NSE: PERSISTENT), a global leader in software product development and technology services. Learn more...

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Accelerite
DMI (Digital Management, LLC)
Artificial Intelligence • Information Technology • Internet of Things • Security • Analytics
25 Offices
2,000 Employees
39 Benefits

DMI is a global technology solutions company that specializes in digital strategy, design, transformation and support. Utilizing expertise from six unique DMI Groups, in the areas of AI & Analytics, Commerce, Experience, Managed Services, Transformation, and Government, DMI delivers intelligent digital transformation solutions that meet organizations where they are. Born digital, DMI has been delivering mission-critical, enterprise grade solutions since...

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DMI (Digital Management, LLC)
B-Secur
Information Technology • Consulting
Belfast
76 Employees

B-Secur is a heart health technology company. Founded in Belfast, Northern Ireland, we are on a mission to save and improve millions of lives each year by advancing heart health technology that brings greater clarity to EKG interpretation with better data and deeper insights. We spent many years immersed in deep scientific research in EKG biometric security. This led us...

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B-Secur
Helen of Troy Limited
Information Technology • Manufacturing
15 Offices
2,023 Employees
31 Benefits

Look around your home, and you'll find us everywhere: In your kitchen, living room, bedroom, and bathroom. We are already making your everyday lives better. We are powered by knowledgeable, enthusiastic, and forward-thinking people committed to developing a culture of inclusion. Whether you are just starting your career or in need of a challenge, we recognize, develop, and empower talent!

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Helen of Troy Limited

Helen of Troy Limited's Top Stability & Growth Strengths

Healthy Cash Flow: Operating cash flow improved year over year and management guides to positive free cash flow, with debt reduction providing added flexibility to invest. Disclosures also point to asset sales and working-capital efficiency supporting liquidity.

Strong Brand Reputation: Flagship brands such as OXO, Hydro Flask, and Osprey are described as leaders within premium niches, and management indicates the portfolio remains competitively vibrant despite macro and tariff pressures. Company materials and cited distinctions reinforce brand strength at the category level.

Future-Ready Strategy: Management is dual‑sourcing production to mitigate tariff exposure and frames FY2027 as a pivot toward growth. Increased focus on product innovation, people, and digital is intended to restore momentum while managing trade headwinds.

Millgate
Hardware • Information Technology • Software
2 Offices
139 Employees

At Millgate, our guiding principle is deceptively simple: we deliver tech products, services and solutions that actually work for your business needs. In nearly 30 years since our inception, Millgate has developed a reputation as a trusted adviser to our clients, able to understand their requirements and provide the very best IT & Tech solutions to meet and exceed their individual...

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Millgate
Decora Blind Systems
Information Technology • Industrial • Manufacturing
Lisburn
182 Employees

Decora’s success has been the result of collaboration between teams and individuals from across the business. From Production and Warehousing to Engineering, Marketing, Design and Finance, teamwork across departments retain one prime focus of providing our customer with a quality, innovative product and service. Decora’s calibre and 40 years history are best described through the product portfolio. The innovative design...

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Decora Blind Systems
First Advantage
Information Technology
2 Offices
3,712 Employees
28 Benefits

First Advantage delivers comprehensive background check solutions and insights that enable employers and housing providers to make confident choices, reduce risk, and maintain compliance. With offices in 26 locations and a staff of 4,000+ employees, First Advantage leverages leading technology and the industry’s largest global capabilities to complete background checks in 200+ countries and territories. If you’re looking for employee...

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First Advantage

First Advantage's Top Stability & Growth Strengths

Strong Market Position & Advantage: First Advantage is positioned as a top-tier provider in background screening following the Sterling Check acquisition, creating a combined business with substantial scale and broad product capabilities. The company’s global footprint and deep enterprise penetration support competitiveness for large, compliance-sensitive programs.

Strong Revenue Growth: Revenue expanded materially from 2024 to 2025, reflecting the step-change from the Sterling acquisition alongside cited commercial momentum. Forward guidance for 2026 indicates continued year-over-year top-line growth off the larger base.

Customer Loyalty & Retention: Customer retention is described as strong, with retention in the mid-to-high range and notable growth attributed to upsell, cross-sell, and new logos. This suggests a relatively sticky customer base supporting resilience through varying hiring cycles.

Lantum
eCommerce • Healthtech • Information Technology • Software
2 Offices
110 Employees
2 Benefits

Lantum is a workforce management platform that makes it easier for healthcare providers to mobilise their workforce, and for clinicians to work more flexibly. Our Connected Scheduling platform gives you a staff bank, rota tool and a clinician network all in one place to improve fill rates, cut admin time, and reduce costs. We started life as Network Locum in...

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Lantum
Anuvu
Digital Media • Information Technology
13 Offices
926 Employees
24 Benefits

Our global team of experts provides demanding mobility markets with technology-driven solutions that keep their passengers entertained and connected to the things they love. From high-speed broadband internet to movies, television and games, our reliable, scalable, and affordable approach is designed to meet the ever-changing technology needs of our clients' passengers and guests.

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Anuvu
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Qualcom
Information Technology • Software
2 Offices
170 Employees

Are you tired of dealing with frustrating IT issues that hinder your business's productivity? Qualcom's Managed IT Services Solution can help you streamline and secure your IT infrastructure, freeing up your time to focus on growing your business. We can provide you with an extensive range of IT Services. Our team of experienced IT experts are dedicated to delivering exceptional customer service, always...

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Qualcom
GTT
Information Technology • Security • Design
33 Offices
3,031 Employees
29 Benefits Hiring Now

GTT is a managed network and security services provider to global organizations. We design and deliver solutions that leverage advanced cloud, networking and security technologies. We complement our solutions with a suite of professional services and exceptional support teams in local markets around the world. We serve thousands of national and multinational companies with a portfolio that includes SD-WAN, security,...

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GTT

GTT's Top Stability & Growth Strengths

Strong Revenue Growth: Consolidated revenues and EBITDA at Gaztransport & Technigaz increased markedly in 2023–2024 with further growth guided for 2025. A sizable multi‑year order book and recent LNG carrier awards provide strong visibility.

Strong Market Position & Advantage: GTT Communications operates a Tier‑1 global IP backbone across continents and is recognized as a Leader in managed network services by ISG and industry programs. A broad enterprise customer base and continued awards reinforce standing in its specialized domains.

Future-Ready Strategy: Both organizations are investing in forward‑looking capabilities, including hydrogen and alternative fuels (GTT S.A.) and SASE/SD‑WAN platforms plus 400G/800G backbone upgrades (GTT Communications). These initiatives position them to address evolving demand and regulatory drivers.

Liberty IT
Information Technology • Insurance
3 Offices
747 Employees
1 Benefits

We’re a bunch of inventors, problem solvers, business brains and tech transformers. We revel in a challenge and stop at nothing to provide the solution, exceeding expectations, breaking new ground and transforming customer interactions. With over 25 years’ experience we’ve got the backing of global giant Liberty Mutual Insurance, with fresh talent to push every boundary. And that’s what makes us...

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Liberty IT

Liberty IT's Top Stability & Growth Strengths

Market Expansion: New city‑centre offices in Dublin and Galway, a dedicated Bonham Quay site, and a Galway hub with a 100‑role plan indicate a widening geographic footprint on the island of Ireland. Current openings across Belfast, Dublin and Galway reinforce ongoing multi‑site growth.

Strong Hiring & Retention: Active recruitment across engineering, data, product and consultancy, alongside sizable graduate intakes and large internal events, point to sustained headcount investment. Repeated Great Place to Work recognition suggests the ability to attract and keep talent.

Innovation-Driven Growth: Cloud transformation on AWS with serverless‑first patterns and showcased AI/ML and virtual assistant initiatives highlight a technology agenda geared toward modernisation. Public write‑ups cite Liberty IT leadership in enterprise AI adoption within Liberty Mutual.

Imperva
Big Data • Cloud • Information Technology • Security
30 Offices
1,508 Employees
35 Benefits

Imperva is a cybersecurity leader with a mission to protect data and all paths to it. We protect the data of over 6,000 global customers from cyber attacks through all stages of their digital transformation. Our products are informed by the Imperva Research Lab, a global threat intelligence community, that feeds the latest security and compliance expertise into our solutions.

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Imperva
ITC Infotech
Information Technology
37 Offices
10,000 Employees
5 Benefits

ITC Infotech is a global technology solution and services leader providing business-friendly solutions, that enable future-readiness for clients. We seamlessly bring together digital expertise, strong industry-specific alliances, and deep domain expertise from ITC Group businesses. Our solutions and services are focused on Banking and financial Services, Healthcare, Manufacturing, Consumer Goods, Travel and Hospitality.

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ITC Infotech
SureSkills
Information Technology • Software
4 Offices
245 Employees

SureSkills is a leader in the design, development and delivery of a wide range of technical learning, knowledge, technical products and candidate placement services and solutions. We partner with global organisations to enable skills, knowledge and capabilities needed to drive real competitive advantage and business value. We can provide workforce solutions by giving companies access to the best talent on...

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SureSkills
prosource.it
Information Technology
2 Offices
371 Employees

prosource.it is a managed IT services provider with a particular focus on infrastructure, operational and project requirements across the corporate enterprise market. We serve Fortune 500 and FTSE250 companies, major financial institutions, and leading private companies concentrated in oil & gas, manufacturing, transportation, media, insurance and finance. With significant investment in PRINCE2, PMI and ITIL accreditation, our workforce has over...

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prosource.it
Exclaimer
Information Technology • Consulting
6 Offices
268 Employees
23 Benefits

Turbo-boost your email signatures After starting Exclaimer over 20 years ago, we saw how our email signature management software could boost the way businesses manage employee email signatures. Today we help brands keep communications consistent and make every message count – all while being legally compliant. But our software doesn’t just help things run smoothly, it lets businesses cut admin overheads...

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Exclaimer
Black Box
Information Technology
35 Offices
5,000 Employees
26 Benefits

Black Box is a global digital infrastructure integrator delivering network and system integration services and solutions, support services, and technology products to businesses in the United States, Europe, India, Asia Pacific, the Middle East, and Latin America and has around 4,000 professionals globally. Black Box has strong service offerings in network integration, digital connectivity infrastructure, data center build-out, modern workplace, and...

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Black Box

Black Box's Top Stability & Growth Strengths

Market Expansion: The company is positioned as having a broad global operating footprint, with operations described across dozens of countries and multiple continents. Growth plans also include geographic expansion through a planned acquisition in Brazil and continued build-out in regions like APAC.

Strategic Partnerships: The company is described as holding strong ecosystem relationships, including a Cisco Gold Partner designation and recognition from vendors such as Juniper and Extreme Networks. These partnerships indicate depth in integrating major networking platforms and can support delivery credibility on large programs.

Resilient & Sustainable Growth: The company is described as having executed a turnaround from earlier losses to profitability, alongside improving margins and a growing order book/backlog. Management’s multi-year growth targets and focus on higher-value mix areas like data centers and AI-led infrastructure further support an upward trajectory.

Options Technology
Information Technology • Financial Services
10 Offices
464 Employees
4 Benefits

Options are the No.1 provider of IT infrastructure to global Capital Markets firms, supporting their operations and ecosystems. With almost 30 years of experience, we understand the highly complex requirements of the Capital Markets sector and work relentlessly to improve our offering, ensuring we stay ahead of the curve and offer clients best-in-class service. Options provide high-performance managed trading infrastructure...

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Options Technology
Clinisys
Information Technology • Software
16 Offices
1,597 Employees
4 Benefits

Clinisys is a global provider of informatics software and expertise to support diagnostic testing across healthcare, life sciences and public health. Millions of diagnostic results and data insights are generated every day using Clinisys’ platform and cloud-based solutions in over 3,000 laboratories across 34 countries. Headquartered in Tucson, Arizona, and Woking, England, Clinisys’ mission is to help make citizens and...

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Clinisys

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