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Top IT Companies in Belfast (124)

O2
Information Technology • Mobile
21 Offices
5,230 Employees
15 Benefits

O2 is the commercial brand of Telefónica UK Limited and is a leading digital communications company with the highest customer satisfaction for any mobile provider according to Ofcom. With over 23 million customers, O2 runs 2G, 3G, 4G and 5G networks across the UK, as well as operating O2 Wifi and owning half of Tesco Mobile. O2 has over 450...

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O2
Unosquare
Information Technology
6 Offices
884 Employees

Unosquare provides custom software development with agile software delivery professionals for Healthcare, Financial Services, and High Tech customers. We do this work from the USA, Latin America, and the United Kingdom. With over 2,500 successfully completed projects, nearly 600 full-time employees, and 100 active distributed teams, Unosquare has been one of the fastest growing private businesses in the USA with...

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Unosquare
Fibrus
Information Technology • Other
3 Offices
393 Employees

Our mission is to bring Full Fibre broadband to homes and businesses across Northern Ireland and Great Britain, especially to those who need it most. Powered by Wi-Fi 6 technology and the award-winning Amazon eero router, our customers get fibrefast speeds all around their home. That’s why we’re one of the fastest-growing broadband companies in Northern Ireland and Great Britain. Our...

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Fibrus
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
IFS
Information Technology • Software
45 Offices
6,788 Employees
28 Benefits

IFS develops and delivers enterprise software for companies around the world who manufacture and distribute goods, build and maintain assets, and manage service-focused operations. Within our single platform, our industry specific products are innately connected to a single data model and use embedded digital innovation so that our customers can be their best when it really matters to their customers...

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IFS

IFS's Top Stability & Growth Strengths

Strong Market Position & Advantage: Market leadership is demonstrated most strongly in Enterprise Asset Management and Field Service/Service Lifecycle, with repeated analyst recognition and cited market-share leadership over multiple years. The platform is positioned as a focused alternative for asset- and service-centric enterprises, with strength concentrated in asset-intensive industries.

Strong Revenue Growth: Growth is characterized as sustained across multiple periods, with recurring and cloud revenue described as increasing year over year alongside expanding revenue scale. Commercial momentum is further supported by mentions of larger enterprise wins, new customer additions, and increasing deal sizes.

Investor Backing & Capital Strength: Private-market transactions and a reported valuation step-up are presented as signals of investor confidence and capital support. Ownership dynamics and new institutional participation are described as enabling continued investment in growth initiatives.

ScreenCloud
Artificial Intelligence • Cloud • Hardware • Information Technology • Software
5 Offices
130 Employees
107 Benefits
Creating connected companies with screens that communicate!

ScreenCloud is a full-stack digital signage solution that provides hardware and software to run screens at scale, improving deployment, management and security. Get mission critical communication infront of the right people, from HQ to deskless and frontline teams.

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ScreenCloud
Sinch
Big Data • Cloud • Information Technology • Marketing Tech • Mobile
4 Offices
1,520 Employees
27 Benefits

Sinch brings businesses and people closer with tools enabling personal engagement. Our leading cloud communications platform lets businesses reach every mobile phone on the planet, in seconds or less, through mobile messaging, voice, and video. Our global headquarters are in Stockholm, Sweden, and we have a local presence in more than 30 countries - probably somewhere near you!

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Sinch
BT Group
Information Technology • Software
36 Offices
80,295 Employees
43 Benefits

We’re one of the world’s leading communications services companies. At BT Group, the solutions we sell are integral to modern life. Our purpose is as simple as it is ambitious: we connect for good. There are no limits to what people can do when they connect. And as technology changes our world, connections are becoming even more important to everyday...

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BT Group

BT Group's Top Stability & Growth Strengths

Strong Market Position & Advantage: BT is positioned as a UK infrastructure and network-quality leader through Openreach’s large full‑fibre footprint and EE’s leading 5G experience indicators, reinforcing durability during the fibre/5G transition.

Market Expansion: Openreach continues to expand full‑fibre coverage rapidly, reporting 20m+ premises passed by late 2025/early 2026 and targeting further growth into 2026, alongside expanding 5G/5G+ reach and a rising 5G customer base.

Future-Ready Strategy: BT’s strategy centers on completing the fibre build, increasing take‑up, modernising the product base, and driving a medium‑term cash‑flow inflection, aiming to translate network leadership into stronger financial resilience over time.

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
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Mzuri Group
Information Technology • Industrial • Manufacturing
Lisburn
5,000 Employees

Mzuri Group is a global luxury window coverings group established with the vision to provide an environment where companies can achieve their true potential. Founded by a leadership team with more than 40 years of success in the window coverings market, the spirit of the group is to assemble the best of the best. Sharing a vision, ideas, experience, resources...

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Mzuri Group
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
Aztech IT Solutions
Information Technology • Cybersecurity
2 Offices
61 Employees
4 Benefits

Aztech IT Solutions is trusted by more than one hundred growing businesses across the UK to deliver professional, proactive IT support services. Aztech provides the IT support and consultancy services that enable organisations to operate more efficiently, safe in the knowledge that their IT systems are optimised and proactively managed. Your IT partner should work as hard to improve your...

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Aztech IT Solutions
Ingram Micro
Cloud • Information Technology • Consulting
29 Offices
27,182 Employees
39 Benefits

Ingram Micro helps businesses Realize the Promise of Technology™. It delivers a full spectrum of global technology and supply chain services to businesses around the world. Deep expertise in technology solutions, mobility, cloud, and supply chain solutions enables its business partners to operate efficiently and successfully in the markets they serve. Unrivaled agility, deep market insights and the trust and...

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Ingram Micro

Ingram Micro's Top Stability & Growth Strengths

Strong Revenue Growth: Company updates show net sales grew in FY2025 and continued to rise year over year into early 2026, with multiple consecutive growth quarters during 2025. Feedback suggests momentum was broad‑based across regions and core lines such as Cloud, notebooks/endpoint, and Advanced Solutions.

Strong Market Position & Advantage: Industry coverage consistently places the company among the top two global IT distributors by revenue, reinforced by deep vendor relationships and extensive geographic reach. Feedback suggests this leadership position supports ecosystem influence and partner access across hardware, software, and cloud.

Innovation-Driven Growth: Management highlights the Xvantage digital platform and cloud marketplace as drivers improving partner experience and sell‑through. Evidence in the updates links platform investment to gains in Cloud and services and to the return to year‑over‑year growth exiting 2024 and through 2025.

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.

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

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.

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

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.

Luxoft
Information Technology • Software • Consulting
27 Offices
15,405 Employees
16 Benefits

Luxoft, a DXC Technology Company (NYSE: DXC), is a digital strategy and software engineering firm providing bespoke technology solutions that drive business change for customers the world over. Acquired by U.S. company DXC Technology in 2019, Luxoft is a global operation in 44 cities and 21 countries with an international, agile workforce of nearly 18,000 people. It combines a unique...

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Luxoft
Metapack
Information Technology • Software
2 Offices
200 Employees

Metapack helps the world’s most successful online retailers and brands provide simple yet powerful delivery experiences. Our delivery management solutions are underpinned by the largest global carrier network – 400 carriers and 4,900 delivery services – supported by the most responsive and highly available API on the market. That means more ways to get your products where they need to...

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Metapack
Allsop Intelligent Software
Information Technology • Software
Belfast
25 Employees

We are Allsop Software, the leading Order Management software-as-a-service (SaaS) provider exclusively serving the Food and Beverage industry. Our team is dedicated to helping businesses like yours thrive in the digital age by harnessing cutting-edge technology. At Allsop Software, we understand the unique challenges faced by Food and Beverage companies in today's fast-paced market. With rising customer expectations, evolving regulatory requirements,...

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Allsop Intelligent Software
Firstup
Information Technology • Other • Software
3 Offices
259 Employees
33 Benefits Hiring Now

Firstup is redefining the digital employee experience to put people first and lift companies up. We make communication solutions that build authentic engagement and create two-way conversation between employees and companies. Our powerful orchestration engine connects every worker, everywhere, on any device with personalized information that helps them do their best work. That’s why 40% of Fortune 100 companies like...

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Firstup

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