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Top IT Companies in Belfast (124)

Systems Limited MEA
Artificial Intelligence • Cloud • Information Technology • Automation
2 Offices
420 Employees

Systems MEA is an MEA-based subsidiary of Pakistan's largest IT company, Systems Limited, which houses a skilled workforce of 7000+ employees globally. Our experience spans to 4 decades with a presence across 5 continents. Our satisfied industry leading clientele of 400+ public and private institutions is a testament to our unparalleled digital solutions. We aspire to enable businesses to build...

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Systems Limited MEA
Reply
Information Technology • Consulting
35 Offices
4,171 Employees
11 Benefits

Reply [EXM, STAR: REY] specialises in the design and implementation of solutions based on new communication channels and digital media. As a network of highly specialised companies, Reply defines and develops business models enabled by the new models of AI, big data, cloud computing, digital media and the internet of things. Reply delivers consulting, system integration and digital services to...

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Reply
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.

Persistent Systems
Artificial Intelligence • Cloud • Information Technology • Software • Cybersecurity • App development • Big Data Analytics
54 Offices
23,000 Employees
18 Benefits
See Beyond, Rise Above

Persistent Systems is a leading provider of digital transformation services, offering innovative solutions tailored to various industries worldwide. With a robust global presence, they deliver cutting-edge services in product engineering, digital strategy, and data analytics, helping businesses thrive in today's rapidly evolving landscape. From healthcare and financial services to retail and manufacturing, Persistent Systems empowers organizations across diverse sectors to...

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Persistent Systems
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
Agio
Information Technology • Cybersecurity
4 Offices
335 Employees
10 Benefits

Agio is a hybrid cybersecurity and managed IT organization that combines predictive intelligence with human brilliance to empower clients with next-generation cyber protection and technology support. We believe service value should be measured by our ability to predict and prevent problems before they happen, not by how many problems we fix. By investing in AI and proactive issue prevention, we’re...

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Agio
Endeavour Information Solutions
Information Technology • Software
2 Offices
29 Employees

Based in the heart of Belfast and Edinburgh, Endeavour Information Solutions provides technology solutions to organisations across the UK and Ireland. We specialise in Microsoft technologies and solutions such as SharePoint, Office 365, Microsoft Dynamics , Kentico CMS as well as bespoke software development solutions. Endeavour is a member of the Microsoft Partner Network and holds two gold competencies in...

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Endeavour Information Solutions
Everbridge
Information Technology • Software • Consulting
28 Offices
1,437 Employees
34 Benefits Hiring Now

Keeping People Safe and Businesses Running. Faster. Everbridge, Inc. (NASDAQ: EVBG) is a global software company that provides enterprise software applications that automate and accelerate organizations’ operational response to critical events in order to Keep People Safe and Businesses Running™. During public safety threats such as active shooter situations, terrorist attacks or severe weather conditions, as well as critical business events...

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Everbridge

Everbridge's Top Stability & Growth Strengths

Strong Market Position & Advantage: Everbridge is positioned as a category leader in critical event management and mass notification, supported by independent analyst recognition and a sizable installed base in government and public safety. National-scale public warning deployments across multiple countries further reinforce perceived leadership in high-stakes, large-scale use cases.

Investor Backing & Capital Strength: The take-private acquisition by Thoma Bravo at a multi-billion-dollar valuation signals continued investor conviction in the business and its market category. Private-equity ownership also implies access to capital and operational support to fund product investment and go-to-market execution.

Innovation-Driven Growth: Ongoing platform updates (Everbridge 360 and High Velocity CEM) and patent activity around AI-enabled crisis response indicate sustained product innovation. Expanded integrations and managed-services motions suggest efforts to translate roadmap velocity into broader adoption.

Haru
Information Technology • Marketing Tech
Belfast
15 Employees

Haru is the quickest way to to sell your clothes for cash. Upload your items in seconds, not minutes. Get paid in days, not weeks. Download the app to start selling in seconds! Haru is proudly powered by RESPONSIBLE, the tech platform revolutionising resale at scale. For news and updates, be sure to follow us at: https://www.linkedin.com/company/get-responsible/

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Haru
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VIAVI Solutions
Information Technology
11 Offices
4,570 Employees
30 Benefits

VIAVI Solutions (NASDAQ: VIAV) is a global leader in both network and service enablement and optical security performance products and solutions. Our technologies contribute to the success of a wide range of customers – from the world’s largest mobile operators and governmental entities to enterprise network and application providers to contractors laying the fiber and building the towers that keep...

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VIAVI Solutions

VIAVI Solutions's Top Stability & Growth Strengths

Strong Revenue Growth: Recent quarters show substantial year-over-year and sequential revenue increases, with guidance indicating continued momentum. Non-GAAP operating margins and earnings improved alongside strength from data center and aerospace/defense demand.

Strong Market Position & Advantage: The company is described as a global leader in network test, monitoring, assurance, and optical technologies, with flagship platforms viewed as industry standards and presence alongside top peers. Strategic acquisitions and partnerships broaden capabilities in high-speed Ethernet, security testing, and Open RAN, reinforcing competitive positioning.

Diversified Revenue Streams: Growth is supported by multiple end-markets including data centers, aerospace/defense, and optical security products, reducing reliance on traditional service providers. Contributions from recently acquired product lines further expand exposure across these segments.

Syndeo.cx
Information Technology • Software
Belfast
17 Employees

Syndeo means 'to connect'. We’re on a mission to make connecting with your customers using AI as natural and simple as saying ‘hello.’ Our Conversational AI Platform for the Customer Journey makes it easy for businesses to engage with consumers through AI-powered messaging and advanced chat technology. Designed for marketing, sales, and service, Syndeo empowers businesses to drive growth and...

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Syndeo.cx
Allstate Northern Ireland
Information Technology • Software
2 Offices

Allstate in Northern Ireland is a leading technology and business services centre, supporting The Allstate Corporation - one of the largest publicly held personal lines insurers in the United States. Established as one of Northern Ireland’s most progressive employers, Allstate NI continues to drive innovation across emerging technologies that shape the future of how people live and work. Our teams are developing...

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Allstate Northern Ireland
Yahoo
AdTech • Digital Media • Information Technology • Other
15 Offices
10,001 Employees
47 Benefits Hiring Now

Yahoo is a global media and tech company that connects people to their passions. We reach nearly 900 million people around the world, bringing them closer to what they love—from finance and sports, to shopping, gaming and news—with the trusted products, content and tech that fuel their day. For partners, we provide a full-stack platform for businesses to amplify growth...

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Yahoo

Yahoo's Top Stability & Growth Strengths

Strong Market Position & Advantage: Yahoo is portrayed as a major platform by reach—ranking top in news and finance, second in email, and remaining among the top internet properties by visitors, with overall traffic placing it behind only a few dominant platforms. Leadership in specific verticals such as finance, news, sports, and email underpins durable competitive footing.

Diversified Customer Base: The company is described as reaching hundreds of millions to nearly 900 million people globally across properties spanning news, finance, sports, shopping, gaming, and email. This breadth indicates exposure to varied audience segments rather than reliance on a single cohort.

Future-Ready Strategy: Leadership highlights a transformation centered on innovation, with emphasis on AI and machine learning at global scale. This focus signals intent to modernize offerings and advertising beyond legacy areas.

Tata Communications
Information Technology
28 Offices
16,277 Employees
9 Benefits

Tata Communications is a digital ecosystem enabler that powers today’s fast-growing digital economy. We enable the digital transformation of enterprises globally, including 300 of the Fortune 500. We carry around 30% of the world’s internet routes and connects businesses to 60% of the world’s cloud giants. We have been a part of the rich heritage of the internet in...

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Tata Communications
Happiest Minds Technologies
Cloud • Information Technology
19 Offices
5,313 Employees
7 Benefits

Happiest Minds Technologies Limited (NSE: HAPPSTMNDS), a Mindful IT Company, enables digital transformation for enterprises and technology providers by delivering seamless customer experiences, business efficiency and actionable insights. We do this by leveraging a spectrum of disruptive technologies such as: artificial intelligence, blockchain, cloud, digital process automation, internet of things, robotics/drones, security, virtual/augmented reality, etc. Positioned as ‘Born Digital ....

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Happiest Minds Technologies
SITA
Information Technology • Consulting
21 Offices
7,798 Employees
33 Benefits

Travel fuels the world today. Connecting us all. Building a better quality of life, and propelling our global economy. Since the start, we’ve made it our lifework to build solutions that help every airline and every airport across the world. We made check-in easier. We let pilots talk to ground control. We delivered better ways to track down lost...

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SITA

SITA's Top Stability & Growth Strengths

Strong Market Position & Advantage: Global reach is positioned as a core strength, including a communications backbone with worldwide coverage and very high availability, plus entrenched platforms like WorldTracer in baggage operations. Segment leadership is described as clearest in air‑transport communications infrastructure, baggage irregularity management, and common‑use/passenger processing where deployments are widespread.

Strong Revenue Growth: Revenue is described as rising for two consecutive years, reaching record results through 2023 and 2024 with growth across major business lines and geographies. Momentum is framed as broad-based rather than limited to a single segment.

Innovation-Driven Growth: Investment in R&D and a stated focus on product innovation are highlighted as contributors to recent momentum. Acquisitions such as Materna IPS and ASISTIM are portrayed as capability additions that expand the end‑to‑end passenger and operations portfolio.

Aspire Technology Solutions
Cloud • Information Technology • Cybersecurity
3 Offices
257 Employees

Welcome to Aspire Technology Solutions! We are an award-winning IT Managed Service and Cyber Security Provider. We deliver leading technology solutions across cyber security, cloud, connectivity, managed services and unified communications to help our customers drive real business benefits. Our mission is to deliver technology like no other; we are dedicated to putting technology to work to help our customers innovate,...

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Aspire Technology Solutions
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
Ensono
Cloud • Information Technology
12 Offices
3,000 Employees
14 Benefits Hiring Now
Support mission critical workloads, modernize IT infrastructure and reduce total cost of ownership.

Ensono helps IT leaders be the catalyst for change by harnessing the power of hybrid IT to transform their businesses. Our broad services portfolio from mainframe to cloud, powered by an intelligent governance platform, is designed to help our clients operate for today and optimize for tomorrow. We are award-winning certified experts in AWS & Azure

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Ensono

Ensono's Top Stability & Growth Strengths

Strong Revenue Growth: Company disclosures indicate revenue expanded from about $224M at inception to roughly $1.1B and clients grew to 250+ by January 2026, reflecting sustained scale-up. Additional signals such as headcount increases and the launch of an AI & Innovation Division reinforce ongoing momentum.

Strong Market Position & Advantage: Multiple independent analyst assessments (ISG, Everest, IDC) place the company as a Leader in mainframe services and modernization, with Gartner listing it in a 2024 Market Guide for the niche. Credentials like the AWS Mainframe Modernization Competency and public-sector recognitions further underpin competitive strength in this segment.

Investor Backing & Capital Strength: Ownership by KKR since 2021 and a stated $250M, five‑year AI investment plan indicate access to capital supporting expansion and R&D. Capability-expanding acquisitions such as Amido and ExperSolve align with a funded growth strategy.

Big Motive
Information Technology • Software • Design
Belfast
26 Employees

Big Motive is a design and innovation studio made up of a diverse team of designers, researchers and technologists. Using data analysis and a range qualitative research approaches, Big Motive helps its clients form a deeper understanding of their customers – to create disruptive digital products and service experiences that inspire growth. Past and current clients include: Allstate Insurance, BBC,...

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Big Motive

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