Company lists · Data refreshed August 2026

Top 15 Accounting outsourcing companies based in Oslo, Norway

Name: Accounting outsourcing companies based in Oslo, Norway
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Aug 30, 2026 35 companies tracked

There are 35 accounting outsourcing companies headquartered in Oslo, Norway (RevenueBase, August 2026). RevenueBase tracks 162 professional contacts across them, including 34 with verified work emails and 5 with mobile numbers. Oslo is the largest hub.

This list covers accounting outsourcing companies headquartered in Oslo, 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 August 30, 2026.

35Companies

162Contacts tracked

34Verified emails

5Mobile numbers

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The 15 largest accounting outsourcing companies based in Oslo, Norway

Ranked by team size

Top 15 of 35 accounting outsourcing companies based in Oslo, Norway, ranked by team size, largest first. Data refreshed Aug 30, 2026. Evidence rates how directly each company's own description names accounting outsourcing companies: 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.
#	Company	Headquarters	Employees	Contacts	Verified emails
1	Amon Regnskap Oslo ASIndirect evidence “Regnskap og bilagsføring, Lønnstjenester, Fakturering, Analyse og rapportering I en verden hvor tid er penger, er det viktigere enn noensinne for små og mellomstore bedrifter å ha…” Source: company website · checked Aug 30, 2026	Oslo, Norway	1-10	12	3
2	Regnskapshuset ASIndirect evidence “Regnskapshuset gir profesjonell bistand innen regnskap, lønn og økonomistyring for mindre og mellomstore bedrifter, slik at bedriftene kan frigjøre ressurser til andre oppgaver.” Source: company website · checked Aug 30, 2026	Oslo, Norway	11-50	10	4
3	Nimbus RegnskapIndirect evidence “Nimbus Regnskap er en Regnskap / It bedrift som leverer skybaserte tjenester.” Source: company website · checked Aug 30, 2026	Oslo, Norway	11-50	9	5
4	Boox ASIndirect evidence “Ute etter å et ryddig og effektivt regnskap?” Source: company website · checked Aug 30, 2026	Oslo, Norway	1-10	6	4
5	Data OG Økonomitjenester ASIndirect evidence “Vi er et framtidsrettet regnskapsfirma som tilpasser og holder oss oppdatert med gode og moderne digitale løsninger.” Source: company website · checked Aug 30, 2026	Oslo, Norway	1-10	6	2
6	Incloud Consult ASIndirect evidence “InCloud Consult AS er et nytenkende og 100 % skybasert regnskapsbyrå hvor både regnskapsførsel, rådgivning og rapportering skjer digitalt.” Source: company website · checked Aug 30, 2026	Oslo, Norway	1-10	5	4
7	Leija ASIndirect evidence “Her er Leija!” Source: company website · checked Aug 30, 2026	Oslo, Norway	1-10	5	3
8	DM Regnskap Oslo ASIndirect evidence Source: company website · checked Aug 30, 2026	Oslo, Norway	1-10	5	1
9	BOK ASIndirect evidence “BOK AS er et regnskap-og rådgivningsselskap med siktemål å hjelpe kommende og eksisterende gründere med å realisere drømmen sin.” Source: company website · checked Aug 30, 2026	Oslo, Norway	11-50	3	1
10	Numetric ASIndirect evidence “Numetric er et komplett regnskapsfirma som tilbyr alle typer tjenester innen regnskap.” Source: company website · checked Aug 30, 2026	Oslo, Norway	1-10	2	2
11	Regnskapssystemer ASIndirect evidence Source: company website · checked Aug 30, 2026	Oslo, Norway	1-10	2	1
12	TOR Kristian Dahlman ASIndirect evidence “Vi tilbyr regnskapsføring, lønn, fakturering og årsoppgjør m.m.” Source: company website · checked Aug 30, 2026	Oslo, Norway	1-10	2	1
13	Thune Økonomistyring ASIndirect evidence “Thune Økonomistyring AS er et regnskapsbyrå som holder til i Thunes vei 2, Oslo, Norway.” Source: company website · checked Aug 30, 2026	Oslo, Norway	1-10	2	1
14	Kristoffersen & Berg ASIndirect evidence Source: company website · checked Aug 30, 2026	Oslo, Norway	1-10	2	1
15	Trio Regnskap ASIndirect evidence “Trio Regnskap AS tilbyr de fleste tjenester innenfor regnskap, økonomi og rådgivning.” Source: company website · checked Aug 30, 2026	Oslo, Norway	1-10	1	1

Showing 15 of 35 accounting outsourcing companies based in Oslo, Norway

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Accounting outsourcing companies based in Oslo, Norway at a glance

As of Aug 30, 2026

1-10Median size (employees)

OsloLargest hub · 35 HQs

5Contacts with mobile numbers

Aug 30, 2026Data refreshed

Companies by employee count

1-10

11-50

501-1,000

1,001-5,000

Accounting outsourcing companies by metro in Norway

Metro	Companies
Accounting outsourcing companies in Oslo	35
Accounting outsourcing companies in Trondheim	7
Accounting outsourcing companies in Alesund	4
Accounting outsourcing companies in Drammen	3
Accounting outsourcing companies in Bergen	3
Accounting outsourcing companies in Lorenskog	3
Accounting outsourcing companies in Sandefjord	3

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 accounting outsourcing companies, 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: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
What qualifies: Companies headquartered in Oslo, Norway whose own description of what they do matches “accounting outsourcing companies”. 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 accounting outsourcing companies, and records with no verified work email. Companies headquartered outside Oslo 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.
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, 34 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 August 30, 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.

Frequently asked

How many accounting outsourcing companies are there based in Oslo, Norway?

There are 35 accounting outsourcing companies headquartered in Oslo, Norway as of August 2026 (RevenueBase).

What is the largest company on this list?

Amon Regnskap Oslo AS, headquartered in Oslo, tops this list with the largest team on record.

Which city has the most accounting outsourcing companies?

Oslo leads with 35 headquartered companies, followed by Trondheim (7) and Alesund (4).

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 34 verified decision-maker contacts tracked across these 35 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 30, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.