Company lists · Data refreshed September 2026

Top 8 Big 5 accounting firms based in Porto, Portugal

RevenueBase identified 34 company matches for big 5 accounting firms associated with Porto, Portugal as of September 2026 and tracks 324 professional contacts across them, including 58 with verified work emails. Across Portugal, Lisbon is the largest hub for this category (74 companies); Porto follows with 34.

This list covers company matches for big 5 accounting firms associated with Porto, Portugal, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built
34Companies
324Contacts tracked
58Verified emails
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The 8 largest big 5 accounting firms based in Porto, Portugal

Ranked by team size
Top 8 of 34 company matches for big 5 accounting firms based in Porto, Portugal, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchPorto, PortugalHQ recorded Sep 28, 202611-5024 contacts →

Exact match

“At Nexia Santos Carvalho & Associados we are truly different.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchPorto, PortugalHQ recorded Sep 28, 202611-5018 contacts →

Exact match

“AccruePartners assumes itself as a Firm of excellence in the provision of multidisciplinary services in the areas of tax and management consulting.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchPorto, PortugalHQ recorded Sep 28, 202611-5013 contacts →

Exact match

“Organização que se dedica à prestação de serviços de Auditoria e Revisão Legal das Contas, Fiscalidade, Consultoria e Serviços em regime de outsourcing (contabilidade, recursos…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchPorto, PortugalHQ recorded Sep 28, 20261-105 contacts →

Exact match

“A CASI – Contabilidade, Fiscalidade e Consultoria, Lda, aposta num relacionamento individualizado e diferenciado com “qualidade de topo” a micro, pequenas e médias empresas.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchPorto, PortugalHQ recorded Sep 28, 20261-104 contacts →

Exact match

“Contabilidade assessoria fiscal diagnóstico económico e financeiro processamento de salários assessoria laboral apoio à criação de empresas”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchPorto, PortugalHQ recorded Sep 28, 20261-103 contacts →

Exact match

“A CONSULTINGCAST é uma "trusted advisor" que presta serviços de assessoria nas áreas de Corporate Finance, Turnaround Consulting, Business Broker, Auditoria e Consultoria fiscal…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchPorto, PortugalHQ recorded Sep 28, 20261-102 contacts →

Exact match

“A Sinerconta, é uma empresa de contabilidade e consultoria, implementada no mercado há 25 anos, que conta com uma equipa de profissionais especializados e tem como missão…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchPorto, PortugalHQ recorded Sep 28, 20261-101 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 8 of 34 big 5 accounting firms based in Porto, Portugal

See the full list, filter by size, metro and specialty, and access 58 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Big 5 accounting firms based in Porto, Portugal at a glance

As of Sep 28, 2026
17.9%Verified-email coverage
9.5Average contacts per company
1-10Median size (employees)
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
22
11-50
9
51-200
2
1,001-5,000
1

Email recency for this list is measured across the whole Portugal list rather than for Porto, so it is reported there. Company counts and contact totals on this page are exact for Porto, over 34 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Porto, Portugal whose business descriptions match “big 5 accounting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 58 professional contacts with verified work emails across the full matched dataset. 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 28, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Big 5 accounting firms by metro in Portugal

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “big 5 accounting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many big 5 accounting firms are there based in Porto, Portugal?

RevenueBase identified 34 company matches for big 5 accounting firms associated with Porto, Portugal as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

NEXIA tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in Portugal has the most big 5 accounting firms?

Lisbon leads Portugal with 74 company records, followed by Porto (34) and Vila Nova De Gaia (12).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 58 professional contacts with verified work emails tracked across these 34 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 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 SmartSearch, 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.