Company lists · Data refreshed September 2026

Top 25 Professional services firms based in Norway

RevenueBase identified 395 professional services firms headquartered in Norway as of September 2026 and tracks 7,940 professional contacts across them, including 1,679 with verified work emails and 229 with mobile numbers. Oslo is the largest hub.

This list covers professional services firms headquartered in Norway, 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review
395Companies
7,940Contacts tracked
1,679Verified emails
229Mobile numbers
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The 25 largest professional services firms based in Norway

Ranked by team size
Top 25 of 395 professional services firms based in Norway, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names professional services firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
PWC NorwayIndirect evidence
Oslo, NorwayHQ checked Sep 5, 20261,001-5,0001,824

“PwC er et ledende globalt kompetansehus som bidrar med kunnskap, innsikt og verdiskapning.”

Source: company website · checked Sep 5, 2026
2
BDO NorgeIndirect evidence
Oslo, NorwayHQ checked Sep 5, 20261,001-5,0001,530

“We see great value in having a local presence and roots, factors which enable us to work closely with our clients.”

Source: company website · checked Sep 5, 2026
3
Kpmg NorwayIndirect evidence
Oslo, NorwayHQ checked Sep 5, 20261,001-5,0001,498

“KPMG er mest kjent som revisorer, forretningskonsulenter og advokater, men vi er også mye mer.”

Source: company website · checked Sep 5, 2026
4
View Group NorgeIndirect evidence
Oslo, NorwayHQ checked Sep 5, 2026501-1,000242

“VIEW Group leverer outsourcing av regnskap, lønn, økonomi og IT-tjenester til norske, nordiske og globale selskaper med 10 til flere tusen ansatte.”

Source: company website · checked Sep 5, 2026
5
Accountor NorgeIndirect evidence
NorwayHQ checked Sep 5, 2026501-1,000192

“Med 70 kontorer over hele Norge er vi store, men også lokale.”

Source: company website · checked Sep 5, 2026
6Hamar, NorwayHQ checked Sep 5, 202651-20087

“Vi står klare når du skal videreutvikle, eller trenger hjelp til å drive selskapet ditt.”

Source: company website · checked Sep 5, 2026
7
Forvis Mazars In NorwayIndirect evidence
Oslo, NorwayHQ checked Sep 5, 202651-20076

“Vi er et internasjonalt integrert partnerskap, med spesialisering innen revisjon, skatt, rådgivning og advokattjenester.”

Source: company website · checked Sep 5, 2026
8
TETIndirect evidence
Oslo, NorwayHQ checked Sep 5, 202651-20072

“Vi lever i en verden drevet av endring.”

Source: company website · checked Sep 5, 2026
9
FrisiktIndirect evidence
Gjøvik, NorwayHQ checked Sep 5, 202651-20048

“Med solid erfaring innen regnskap, økonomisk rådgivning, IT og rekruttering hjelper vi bedrifter med å ta gode valg for en enklere, tryggere og mer lønnsom hverdag.”

Source: company website · checked Sep 5, 2026
10
Saga Regnskap & RådgivningIndirect evidence
Sandefjord, NorwayHQ checked Sep 5, 202651-20040

“Saga Regnskap & Rådgivning er et frittstående regnskapsbyrå som hjelper små og mellomstore bedrifter i Vestfold og Telemark til økt effektivitet og bedre lønnsomhet.”

Source: company website · checked Sep 5, 2026
11
BDT Viken ASIndirect evidence
3181, NorwayHQ checked Sep 5, 202651-20037

“Kunnskapshuset BDT Viken har en bred kompetanseplattform innen regnskap, rådgiving og revisjon med til sammen 50 ansatte.”

Source: company website · checked Sep 5, 2026
12
Account Group NorgeIndirect evidence
Hokksund, NorwayHQ checked Sep 5, 202651-20035

“Account Group samarbeider tett med mange ulike virksomheter i hele landet.”

Source: company website · checked Sep 5, 2026
13
Relevant Regnskap ASIndirect evidence
Stavanger, NorwayHQ checked Sep 5, 202611-5034

“Vi tilbyr regnskapsføring og rådgivning med personlig engasjement og tilnærming til våre kunder.”

Source: company website · checked Sep 5, 2026
14
Wican GruppenIndirect evidence
Fredrikstad, NorwayHQ checked Sep 5, 202651-20033

“Vi i Wican samarbeider så tett med kundene at vi ofte oppleves som deres interne avdeling.”

Source: company website · checked Sep 5, 2026
15
PKF Revisjon ASIndirect evidence
Oslo, NorwayHQ checked Sep 5, 202611-5030

“PKF ReVisjon er en revisjons- og rådgivningsvirksomhet med klienter innen et bredt spekter av forretningsområder.”

Source: company website · checked Sep 5, 2026
16
Oseberg Services ASIndirect evidence
Nøtterøy, NorwayHQ checked Sep 5, 202611-5029

“Oseberg Services er en utfordrer til de større regnskapsbyråene med fokus på personlig oppfølgning av kundene våre.”

Source: company website · checked Sep 5, 2026
17
Tandem ASIndirect evidence
Oslo, NorwayHQ checked Sep 5, 202611-5023

“Tandem er et kompetansehus og en tjenesteleverandør innenfor regnskap, lønn og økonomisk rådgivning.”

Source: company website · checked Sep 5, 2026
18
Kantall- EN DEL AV AdmentoIndirect evidence
Lillehammer, NorwayHQ checked Sep 5, 202611-5023

“Kantall er et regnskapsbyrå med solid kompetanse og dedikerte medarbeidere lokalisert på Lillehammer.”

Source: company website · checked Sep 5, 2026
19Kristiansund, NorwayHQ checked Sep 5, 202651-20023

“Ved årsskiftet vil SpareBank 1 Regnskapshuset Nordvest AS slå seg sammen med Trio Regnskapsservice og etablere SpareBank 1 Økonomipartner.”

Source: company website · checked Sep 5, 2026
20Tønsberg, NorwayHQ checked Sep 5, 202611-5022

“Want a local and independent auditing company with personal service, so ask us!”

Source: company website · checked Sep 5, 2026
21
NitschkeIndirect evidence
Lysaker, NorwayHQ checked Sep 5, 202611-5022

“NITSCHKE består av revisjonsselskapet Nitschke AS, som drives av statsautoriserte revisorer, og det autoriserte regnskapsførerselskapet Nitschke Consult AS.”

Source: company website · checked Sep 5, 2026
22
Vkst ASIndirect evidence
Bergen, NorwayHQ checked Sep 5, 202611-5022

“VKST er et økonomihus som holder til i Bergen og leverer alt innen regnskaps- og økonomitjenester.”

Source: company website · checked Sep 5, 2026
23Levanger, NorwayHQ checked Sep 5, 202611-5019

“Fra etableringen i 1986 har vi levert regnskapstjenester og økonomisk rådgiving.”

Source: company website · checked Sep 5, 2026
24
ComplérIndirect evidence
Bergen, NorwayHQ checked Sep 5, 202611-5019

“Vil du bli en del av laget?”

Source: company website · checked Sep 5, 2026
25
Hasund ASIndirect evidence
Ulsteinvik, NorwayHQ checked Sep 5, 202611-5019

“Accounting, Payroll & Business Counseling Situated in Ulsteinvik, Møre og Romsdal.”

Source: company website · checked Sep 5, 2026

Showing 25 of 395 professional services firms based in Norway

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Professional services firms based in Norway at a glance

As of Sep 5, 2026
1-10Median size (employees)
OsloLargest hub · 84 HQs
229Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
248
11-50
117
51-200
19
201-500
2
501-1,000
3
1,001-5,000
3

Verified emails by last verification

0–30
1,468
31–60
114
61–90
5
90–180
3
180+
89

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 professional services firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in Norway whose own description of what they do matches “professional services firms”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among professional services firms, and records with no verified work email. Companies headquartered outside Norway 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 an evidence 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, 1,679 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 5, 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.

Professional services firms by metro

  • Professional services firms in Oslo84

Frequently asked

How many professional services firms are there based in Norway?

RevenueBase identified 395 professional services firms headquartered in Norway 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?

PWC Norway, headquartered in Oslo, tops this list with the largest team on record.

Which city has the most professional services firms?

Oslo leads with 84 headquartered companies, followed by Sandefjord (10) and Trondheim (10).

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 1,679 verified decision-maker contacts tracked across these 395 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 5, 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.