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Top B2B Companies in Ireland

TrustList ranks 480 companies in Ireland across 15 categories. The biggest lists are IT product companies (93), IT service providers (89) and accounting firms (77). Each list below is the top of its full ranking, ordered by rating, review volume and listing quality; no one pays for a position.

The businesses here list work in Dublin, Northern Ireland, London and England. 468 of them have written a profile you can read before you get in touch.

What to check before you hire in Ireland

  • Which legal entity signs, and which country's courts the contract names, since the office you met may not be the company on the invoice
  • Where your data will actually be stored and processed, and whether that is allowed under the rules you are bound by
  • Who owns the work: intellectual property assignment has to be valid under the law of the supplier's country, not only yours
  • The overlap in working hours you will really get, and who is reachable when something breaks at your end of the day
  • The currency you are billed in, who carries the exchange-rate movement, and what the payment fees add
  • References from clients in your own market, not only in the supplier's: the ones who had to manage the distance
  • How the relationship ends: notice, handover of code, credentials and data, and what happens to staff assigned to you

Each section below is the top of that category's own ranking for Ireland, so the two pages can never disagree. At the top of the largest of them, IT service providers, right now: Evros Technology Group, Qualcom and Codec Ireland.

  1. Optel Group logo

    Software Development · E-Commerce Development · eCommerce · Also in Canada

    Traceability is the core of Optel Group's business. The company, founded in 1989 and based in Canada, builds systems that follow products through the supply chain.

    Why #1: Based in Canada, with facilities in Ireland, India and Brazil · Founded 1989 · professional accreditation, as stated on its own website, read 6 Oct 2026

    Not yet on record: client reviews, vetting.

  2. D

    Web Development · Web Design · IT Services

    Datalex supplies digital commerce software to airlines, covering shopping, pricing and order management. The company was founded in 1985 and is headquartered in Dublin, Ireland.

    Why #2: Based in Dublin, Ireland · Founded 1985 · Team of 200+, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  3. EI

    Web Development · Web Design · IT Services · Also in United Kingdom

    Esri Ireland supplies and supports geographic information system (GIS) software and services in Ireland.

    Why #3: Based in Dublin and Belfast · Founded 2002 · Team of 45+, as stated on its own website, read 6 Oct 2026

    Not yet on record: client reviews, vetting.

  4. IRIS Software Group logo

    Web Development · Web Design · IT Services · Also in United Kingdom

    IRIS Software Group develops business software for UK organisations and has been doing so for more than forty years.

    Why #4: Based in United Kingdom, with payroll services also offered in Ireland · In business 40+ years, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  5. I

    Web Development · Web Design · IT Services

    Intact, formerly an Ireland and UK software company, now trades as GenetiQ.

    Why #5: Based in Ireland and the UK · Founded 1992, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  1. ET

    Web Development · Web Design · IT Services

    Evros Technology Group provides managed IT services and systems integration from Ireland.

    Why #1: Based in Dublin, Cork and Waterford · Founded 1990 · ISO 27001, professional accreditation · Team of 250+, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  2. Q

    Microsoft Dynamics 365 · Web Development · Web Design

    Qualcom is an Irish IT services company that began in Dublin in 1995.

    Why #2: Based in Dublin, Ireland · Founded 1995 · ISO 27001, professional accreditation, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  3. CI

    Web Development · Web Design · IT Services

    Irish IT consultancy delivering Microsoft-based digital projects for public and private sector organisations in Ireland and the UK

    Why #3: Based in Dublin, Ireland · Founded 1985 · Microsoft partner · Team of 240+, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  4. D

    Web Development · Web Design · IT Services

    Irish IT services provider covering infrastructure, security, business applications and procurement for organisations nationwide

    Why #4: Based in Dublin, Wexford and Belfast · Founded 1982 · professional accreditation, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  5. HB

    Web Development · Web Design · IT Services

    HCS Business Solutions is an Irish IT services company with offices in Dublin and Waterford.

    Why #5: Based in Dublin and Waterford, Ireland · Founded 1994 · Microsoft partner, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  1. Crowleys DFK logo

    Cloud · Accounting · Tax · Also in Dublin

    Two offices in the central business districts of Cork and Dublin serve a client list that runs from small Irish companies to larger groups and public bodies.

    Why #1: Office in Ireland · In business 50+ years · professional accreditation, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  2. Leonard & Company logo

    Not for Profit · Financial Services · Cloud · Also in Dublin

    Founded in 1947, Leonard & Company operates from Rathfarnham, South Dublin, as a chartered certified accountancy practice.

    Why #2: Based in Rathfarnham, Dublin, Ireland · Founded 1947 · Owner-managed, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  3. Copsey Murray logo

    Accounting · Legal · Also in Dublin

    Copsey Murray is a chartered accountancy practice in Dublin city centre that has been in business since 1974.

    Why #3: Based in Dublin, Ireland · Founded 1974, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  4. HLB Ryan logo

    Accounting · Legal · Also in Basel

    HLB Ryan, which presents itself as HLB Ireland, is an advisory and accounting firm based in Dublin.

    Why #4: Based in Dublin, Ireland · Founded 1976, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  5. Lewis & Co. Accountants logo

    Tax · Legal · Also in Dublin

    Lewis & Co is a firm of chartered accountants based in Stillorgan, County Dublin, and the firm says it has been in practice since 1982.

    Why #5: Based in Stillorgan, Co Dublin · Founded 1982 · Sole trader, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  1. Call Management logo

    Based in Cork, Call Management is an Irish-owned and Irish-managed contact centre.

    Why #1: Based in Cork, Ireland · Founded 2001 · ISO 9001, ISO 27001, professional accreditation, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  2. Firstaff Personnel Consultants Ltd. logo

    Firstaff Personnel Consultants Ltd. is a recruitment agency in Dublin, established in 1967.

    Why #2: Based in Dublin · Founded 1967, as stated on its own website, read 9 Oct 2026

    Not yet on record: client reviews, vetting.

  3. Donal M. Gahan, Ritchie logo

    Donal M. Gahan, Ritchie is a solicitors' firm in Dublin with over 50 years of service to clients.

    Why #3 (shared): Based in Dublin · In business 50+ years, as stated on its own website, read 9 Oct 2026

    Not yet on record: client reviews, vetting.

  4. Interface Financial Group logo

    simple · Automation

    Interface Financial Group, known as IFG, provides working capital through early payment programmes.

    Why #3 (shared): Based in Dublin, Richmond, Tonbridge and Bethesda · In business 50+ years, as stated on its own website, read 9 Oct 2026

    Not yet on record: client reviews, vetting.

  5. BKRM Nexus logo

    Accounting · Tax · Legal

    Dublin chartered accountants and tax advisers offering accounting, audit and company formation for small and medium firms

    Why #5: Based in Dublin, Ireland · Founded 1981, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  1. CDG Brand logo

    Branding

    CDG Brand is a Dublin agency that combines brand strategy, visual design, web work and digital marketing.

    Why #1: Based in Dublin, Ireland · Founded 1989, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  2. Enhance logo

    Web Development · Video · Reporting

    Enhance is recorded as a web design and development company in Dublin, Ireland.

    Why #2 (shared): Based in Dublin, Ireland · Founded 1996, as stated on its own website, read 29 Sept 2026

    Not yet on record: client reviews, vetting.

  3. FUSIO logo

    FUSIO designs and develops websites and mobile apps from its base in central Dublin.

    Why #2 (shared): Based in Dublin, Ireland · Founded 1996, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  4. Bluebloc logo

    Creative · Legal · Responsive

    Since 1999 Bluebloc, a creative digital studio in Dublin, has designed and developed digital experiences for organisations in Ireland.

    Why #4: Based in Dublin, Ireland · Founded 1999, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  5. Cron Design Studio logo

    Cron Design Studio is a design and web software company in Dublin, Ireland, run by Ciaran O'Kelly.

    Why #5: Based in Dublin, Ireland · Founded 2003, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  1. Heneghan logo

    Also in Galway

    Founded in 1990, Heneghan advises organisations in Ireland on communications and public affairs from its Dublin base.

    Why #1: Based in Dublin, Ireland · Founded 1990, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  2. Gibney Communications logo

    Web Design · Also in Dublin

    Large Irish companies and organisations rely on Gibney Communications for corporate reputation, media relations and public affairs.

    Why #2: Based in Ireland · Founded 1995, as stated on its own website, read 29 Sept 2026

    Not yet on record: client reviews, vetting.

  3. Enhance.ie logo

    Web Development · Video · Reporting

    Enhance.ie is recorded as a web design and development business in Dublin, Ireland.

    Why #3: Based in Dublin, Ireland · Founded 1996, as stated on its own website, read 29 Sept 2026

    Not yet on record: client reviews, vetting.

  4. Catalyst Market Research logo

    Catalyst Market Research studies consumers and brands for retailers and brand owners in Ireland and the UK.

    Why #4 (shared): Based in Dublin, Ireland · In business 25+ years, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  5. Accuracy Market Research logo

    Market Research · Video · Education

    Irish market research agency running brand, reputation, customer experience and health research, with its own consumer panel

    Why #4 (shared): Based in Ireland · In business 25+ years, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  1. indiepics logo

    Financial Services · Non Profit · Retail

    Indiepics is a production company in Dublin, Ireland, that makes factual television.

    Why #1: Based in Dublin, Ireland · In business 30+ years, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  2. Evolution Digital Marketing logo

    Social Media Marketing · Web Development · Web Design

    Based in Blackrock, Dublin, the boutique agency Evolution Digital Marketing has worked with businesses since 1999.

    Why #2: Based in Blackrock, Dublin, Ireland · Founded 1999 · Boutique, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  3. Idea Dublin logo

    Idea is a design, branding and digital marketing agency in Dublin, Ireland, trading as Idea Ltd.

    Why #3: Based in Dublin, Ireland · In business 25+ years, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  4. Cube Digital Marketing logo

    Consumer Products & Services · Advertising & Marketing · Financial Services

    Cube Digital Marketing is a search marketing agency in Dublin that has been running since 2009; its website now trades under the BeFound SEO name.

    Why #4: Based in Dublin, Ireland · Founded 2009, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  5. Jamie Ralph Digital Marketing logo

    Digital Marketing · Creative · SEO

    Working from Ireland, Jamie Ralph Digital Marketing offers consultancy and campaign work to small and medium businesses that want more sales, bookings and enquiries from their…

    Why #5 (shared): Based in Ireland · In business 10+ years, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  1. Ebow, the digital agency logo

    Ebow, the digital agency, is a Dublin-based agency working in strategy, design, technology and marketing.

    Why #1: Based in Dublin, Ireland · Founded 1999, as stated on its own website, read 29 Sept 2026

    Not yet on record: client reviews, vetting.

  2. Boys + Girls logo

    Boys + Girls is an independent advertising agency in Dublin that opened in 2009.

    Why #2: Based in Dublin, Ireland · Founded 2009, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  3. Brandlogik logo

    Creative · Video · Partners · Also in Chelsea and Belfast

    Brandlogik is a human-centred AI design studio in Ireland that blends creative insight with intelligent tools.

    Why #3: Based in Ireland · Founded 2010, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  4. Galicki Digital logo

    Web Design · PHP · SEO

    Small businesses in Ireland get websites built to rank in Google from Galicki Digital, a web design business that has worked in the country since 2019.

    Why #4: Based in Ireland · Founded 2019, as stated on its own website, read 29 Sept 2026

    Not yet on record: client reviews, vetting.

  5. CARD Group Research logo

    Market Research · Advertising · Analytics · Also in Europe

    Customers, employees, brands and stakeholders are the subjects studied by CARD Group Research, which trades as CARD Group Research & Insight and helps organisations base decisions…

    On record: Founded 2003, as stated on its own website, read 28 Sept 2026

  1. IPPVA logo

    Tax · Creative · Video · Also in Dublin

    Since 1949 IPPVA, the Irish Professional Photographers and Videographers Association, has represented photographers and videographers working across Ireland.

    Why #1: Based in Ireland · Founded 1949, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  2. David Cantwell Photography logo

    Video · Advertising · Also in Dublin

    David Cantwell Photography is a commercial studio in Finglas, on the north side of Dublin, close to the M50.

    Why #2: Based in Finglas, Dublin, Ireland · Founded 1998, as stated on its own website, read 29 Sept 2026

    Not yet on record: client reviews, vetting.

  3. Cartoon Saloon logo

    Cartoon Saloon is an animation studio in Kilkenny, Ireland, known for 2D feature films that blend traditional drawing with digital methods.

    Why #3: Based in Kilkenny, Ireland · Founded 1999, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  4. Leinster Photography & Video logo

    Video · Advertising · Responsive · Also in Dublin

    Leinster Photography & Video is a commercial photographer and video producer based in Dublin city centre, with a second studio near Ashbourne, Co. Meath.

    Why #4: Based in Dublin, Ireland · Founded 2010, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  5. Animation Ireland logo

    Tax · Animation

    Animation Ireland is the trade association for the animation industry across the island of Ireland, trading formally as The Association of Animation Producers in Ireland.

    On record: Based in Dublin, Ireland

  1. Action Recruitment logo

    Executive Search · Permanent Recruitment · DataBase · Also in New York and York

    Action Recruitment is a recruitment agency based in Dublin that specialises in hospitality and hotel management.

    Why #1: Founded 1974, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  2. Harvey Nash Finland logo

    IT and Tech Recruitment · Outsourcing

    Harvey Nash Finland is a regional arm of Harvey Nash, a technology recruitment agency that is part of Nash Squared.

    Why #2 (shared): In business 30+ years, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  3. Forde May Consulting Ltd logo

    Also in Northern Ireland

    Northern Ireland executive search and selection consultancy recruiting chief executives, directors, board members and senior managers

    Why #2 (shared): Founded 1996, as stated on its own website, read 29 Sept 2026

    Not yet on record: client reviews, vetting.

  4. Cpl Healthcare logo

    Permanent Recruitment · Healthcare Recruitment · Government · Also in Sydney and Melbourne

    Cpl Healthcare is the Irish healthcare recruitment arm of the Cpl group.

    Why #2 (shared): In business 30+ years, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  5. Bond Personnel logo

    IT and Tech Recruitment · Executive Search · Accounting · Also in Fleet and Dublin

    Bond Personnel is a recruitment business in Dublin, with offices in the Temple Bar district of the city centre since 1997.

    Why #5: Founded 1997, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  1. Advantio logo

    IT Services · Data Security · E-Commerce Development

    Advantio is a cybersecurity services provider. It combines technology with managed, advisory and testing services so that organisations can raise their cyber resilience and meet…

  2. TC

    Web Development · Web Design · IT Services

    Topsec Cloud Solutions provides cloud-based, fully managed email and web security.

  3. T

    Web Development · Web Design · IT Services

    Threatscape is a pure-play cyber security company with offices in Dublin and London.

  4. EL

    Web Development · Web Design · IT Services

    Eurokom Ltd is a provider of cloud-delivered security services for business information. The service started in 2002 as a division of a wider security group.

  5. WS

    Web Development · Web Design · IT Services

    Ward Solutions is an Irish information security company. It advises on risk and compliance, designs and installs security technology, and can run parts of a client's security…

  1. FMI Field Management Ireland logo

    Customer Service · Also in Dublin

    Irish field marketing, distribution and contact centre firm working for consumer goods, drinks, utilities and telecoms brands

    Why #1: Based in Dublin and Belfast · Founded 1995, as stated on its own website, read 29 Sept 2026

    Not yet on record: client reviews, vetting.

  2. Call Centre Solutions logo

    Also in Dublin

    Call Centre Solutions, known as CCS, gives companies a business presence in central Dublin.

    Why #2: Based in Dublin, Ireland · Founded 1996, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  3. Arema Connect logo

    Market Research · Retail · Reporting

    Cork is home to Arema Connect, an Irish contact centre founded in 2001 that talks to customers on behalf of other companies.

    Why #3: Based in Cork, Ireland · Founded 2001, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  4. Focus One logo

    Lead Generation · WordPress · Goals

    Telephone outreach for B2B firms in Ireland and the UK is the core of the work.

    On record: Founded 2005, as stated on its own website, read 29 Sept 2026

  5. ContactCentre.ie logo

    ContactCentre.ie is an outbound calling business in Carndonagh, County Donegal, where 50 local callers work on telephone campaigns for Irish and international clients.

    On record: Based in Carndonagh, County Donegal, Ireland · Team of 50+, as stated on its own website, read 28 Sept 2026

  1. Arrow Design logo

    Advertising & Marketing · Web Design · Information Technology · Also in Dublin

    Working from Sandyford, Dublin, Arrow Design builds websites and small business software for companies across Ireland.

    Why #1 (shared): Based in Sandyford, Dublin, Ireland · Founded 2006, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  2. Liberty IT logo

    Web Development · Web Design · IT Services · Also in United Kingdom

    Liberty IT is a technology company with offices in Belfast, Dublin and Galway.

    Why #1 (shared): Based in Belfast, Dublin and Galway · In business 20+ years, as stated on its own website, read 6 Oct 2026

    Not yet on record: client reviews, vetting.

  3. Ardanis logo

    JavaScript · SaaS · SME

    Ardanis designs and builds custom software for organisations in the UK and Ireland, and has done so since 2016.

    Why #3: Based in UK and Ireland · Founded 2016, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  4. European IT Solutions logo

    Consumer Products & Services · Financial Services · Business Services · Also in New Delhi, India and Delhi, India

    Based in Ireland, European IT Solutions, which trades as EUITSols, builds websites for businesses of many sizes and treats web design and development as its main service.

    On record: Founded 2009, as stated on its own website, read 5 Oct 2026

  5. PT

    Protego Technologies builds and leads software engineering teams for multinational companies setting up technology operations in Ireland.

    On record: Founded 2020, as stated on its own website, read 9 Oct 2026

  1. Data Ireland logo

    DataBase · external · Also in Dublin

    Trading as Data Ireland, a firm registered in Ireland as Precision Marketing Information Limited, this business helps organisations with outside data and information handling.

  2. Evolve Technologies logo

    Evolve Technologies, trading as EvolveTech, works from Ennistymon, County Clare, Ireland, building bespoke software, business intelligence reporting and connected systems.

  3. IntelVision logo

    Software Development · Application Development · eCommerce

    IntelVision has its head office in Dublin, Ireland, and runs development centres in Eastern Europe.

  4. TI

    Web Development · Web Design · IT Services

    The Information Lab Ireland is a data strategy consultancy serving Irish businesses.

  5. NA

    Web Development · Web Design · IT Services

    Nathean Analytics sells a clinical and business analytics platform.

  1. Universal Music Group logo

    Also in Georgia and Sandwich

    Universal Music Group is a music company that operates a range of businesses in more than 60 countries, according to its own description, including recorded music and music…

  2. Enterprise Ireland logo

    Biotech · Also in Toronto and Shanghai

    A government agency, Enterprise Ireland supports manufacturing and internationally traded service businesses in Ireland.

  3. PAR Equity logo

    Financial Services · Partnership · Also in Scotland and Edinburgh

    PAR Equity is an equity investor headquartered in Edinburgh. Its investor base spans Northern England, Northern Ireland and Scotland, and it puts money into emerging technology…

  4. Enterprise Equity Limited logo

    SaaS · CRM · Also in San Francisco and Co. Dublin, Ireland

    Irish software, hardware and games businesses with ambitions beyond the home market make up much of the portfolio of Enterprise Equity, a venture capital firm that has been…

  5. O2h Ventures logo

    Tax · .NET · Partners · Also in Africa and Cambridge

    O2h Ventures manages funds for UK taxpayers who want exposure to young biotech and life-science companies through the Enterprise Investment Scheme (EIS) and the Seed Enterprise…

For vendors

Want to see your company here?

The order is earned on evidence: client reviews, vetting, awards and the facts a business states on its own website, which we read and date. Nobody can pay to move up. Add reviews or verified facts to your free profile to move up at the next edition; there are two ways to stand out now, and each one says what it is.

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Sponsor a ranking

Paid · always labelled

  • A Sponsored card above the ranked list, up to three per ranking
  • Marked Sponsored, and it never changes the order
  • Booked by the month; cancel any time

How is this ranking worked out?

A position here is earned, never bought. It is worked out from what a firm publishes and what has been verified about it:

  • Profile completeness: the details a buyer needs to judge a firm: what it does, who it serves, how it prices, who it has worked for
  • Earned trust: verification, awards and the other checks a firm has actually passed
  • Client reviews, where they exist: the rating is smoothed, so one five-star review cannot outrank a firm with a hundred good ones, and volume counts with diminishing returns

Be clear about the third one: client reviews are still rare across this catalogue, so on most lists today the order is set by the first two. A firm near the top is the best-documented and best-verified one we hold, which is not the same claim as the best one to hire. Use the list to build a shortlist, then check the firms yourself.

No firm can pay for a position. Sponsored listings are labelled and shown apart from this list. How rankings work

Where else can I look in Ireland?

Every category ranked here has its own full list: IT service providers (88), IT product companies (65) and accounting firms (21). Or compare countries from the country index.

Top B2B companies in other countries

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