Company lists · Data refreshed September 2026
Top 25 Information services companies based in Portugal
RevenueBase identified 198 information services companies headquartered in Portugal as of September 2026 and tracks 4,282 professional contacts across them, including 968 with verified work emails. Lisboa is the largest hub.
This list covers information services companies headquartered in Portugal, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest information services companies based in Portugal
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,168 contacts → | ||||
Indirect evidence “GMS was established in early 2003 to provide strategic, business and IT consulting and changed its name to Maksen in December 2010.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 341 contacts → | ||||
Strong evidence “AskBlue is a company created in 2013 that provides specialized consulting services in the financial sector and information technology.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 233 contacts → | ||||
Strong evidence “Founded in NLS is an Information systems Consulting company committed to delivering results that add value to its clients.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 230 contacts → | ||||
Strong evidence “LCG provides consulting services, using their multidisciplinary skills in the areas of strategic and operational management, information systems, management support, business…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 127 contacts → | ||||
Indirect evidence “A IQVIA (NYSE:IQV) é o fornecedor líder global de serviços de investigação clínica, análises comerciais e inteligência na área da saúde para as indústrias de ciências da vida e de…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 81 contacts → | ||||
Strong evidence “Optimizer is an IT service and information systems company focused on providing complementary services in the information technology sector.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 74 contacts → | ||||
Indirect evidence “We cannot foresee the future.but we can help you to be prepared for it.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 53 contacts → | ||||
Indirect evidence “Sword Group is an international company specializing in IT services and digital transformation.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 52 contacts → | ||||
Indirect evidence “We are a data analytics and IT consulting company focused on helping you get the most out of your data.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 42 contacts → | ||||
Indirect evidence “A ByMe, especialista em Tecnologias de Informação, Cuidados de Saúde e Formação Profissional, atua enquanto consultora na gestão empresarial, dispondo de um vasto leque de opções…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 36 contacts → | ||||
Indirect evidence “A CERB foi fundada em 1987 e desde então tem vindo a firmar-se enquanto empresa de consultoria especialista na prestação de serviços de apoio à gestão, contabilidade financeira…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 35 contacts → | ||||
Indirect evidence “A Sendys é uma consultora tecnológica que se dedica ao desenvolvimento, manutenção, comercialização e suporte de soluções de gestão para pequenas, médias e grandes empresas, com…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 31 contacts → | ||||
Strong evidence “Holos provides Information and Communication Technology (ICT) solutions.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 28 contacts → | ||||
Indirect evidence “A Base TX é uma empresa especializada no desenvolvimento e implementação de Software de Gestão, Infra-Estruturas e Segurança.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 28 contacts → | ||||
Indirect evidence “Dixtior is a Portuguese consultancy firm that seamlessly combines the very best of two worlds.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 27 contacts → | ||||
Strong evidence “Information technology consulting services” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 24 contacts → | ||||
Indirect evidence “We are a computer consulting company born in 2011, specialized in maintenance, monitoring and management services of computer resources.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 24 contacts → | ||||
Indirect evidence “A timestamp:biw, como organização orientada para a oferta de soluções tecnológicas de acompanhamento estratégico, soluções analíticas e infra-estruturas de informação de gestão…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 23 contacts → | ||||
Indirect evidence “Consulmark® is a full-service Market Research company, founded in 2004, with his headquarters located in Lisbon downtown - conducts both qualitative and quantitative studies and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 22 contacts → | ||||
Strong evidence “DATA E is a Market Research, Business Consulting and Information Technology firm, with its areas of expertise in management and Information Technologies (ITs), in particular…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 21 contacts → | ||||
Strong evidence “EVEREDGE was founded in 2016 and focuses its activity on providing strategic and operational information systems consulting services.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 21 contacts → | ||||
Indirect evidence “We're an IT professional services company built on a foundation of wisdom, integrity, skills and experience.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 21 contacts → | ||||
Indirect evidence “Streamroad Consulting is a company that specializes in the IT market, offering a wide range of Business Intelligence and Market Consultancy solutions to IT vendors, among which we…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 19 contacts → | ||||
Indirect evidence “Qmetrics is a consulting company in Marketing and Business Intelligence based in Portugal.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 18 contacts → | ||||
Indirect evidence “InovaPrime is a global IT company with a core business in Consulting, Managed Services, Solution Development and Outsourcing.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: information services companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names information services companies.
- Partial evidence
- Its own public description names part of information services companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name information services companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 198 information services companies based in Portugal
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Information services companies based in Portugal at a glance
As of Sep 20, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for Portugal, so it is reported there. Company counts and contact totals on this page are exact for Portugal, over 198 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among information services companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Portugal whose own description of what they do matches “information services companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names information services companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among information services companies, and records with no verified work email. Companies headquartered outside Portugal are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 968 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Information services companies by metro
- Information services companies in Lisboa39
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names information services companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many information services companies are there based in Portugal?
RevenueBase identified 198 information services companies headquartered in Portugal as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
GMS, headquartered in Lisbon, tops this list with the largest team on record.
Which city has the most information services companies?
Lisboa leads with 39 headquartered companies, followed by Lisbon (24) and Porto (13).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 968 verified decision-maker contacts tracked across these 198 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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