Company lists · Data verified August 2026

Top 25 Advertising consulting firms based in Oslo, Norway

Name: Advertising consulting firms based in Oslo, Norway
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 79 companies tracked

There are 79 advertising consulting firms headquartered in Oslo, Norway (RevenueBase, August 2026). RevenueBase tracks 903 professional contacts across them, including 227 with verified work emails and 41 with mobile numbers. Oslo is the largest hub.

This list covers advertising consulting firms headquartered in Oslo, Norway, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

79Companies

903Contacts tracked

227Verified emails

41Mobile numbers

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The 25 largest advertising consulting firms based in Oslo, Norway

Ranked by team size

Top 25 of 79 advertising consulting firms based in Oslo, Norway, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	WAL	Oslo	51-200	124	58
2	BLOOM	Oslo	51-200	78	21
3	The Oslo Company	Oslo	11-50	54	17
4	Anorak NOA	Oslo	11-50	38	25
5	Spoon Norge PPP	Oslo	11-50	26	16
6	Semway	Oslo	11-50	18	8
7	MMM Agency	Oslo	11-50	17	12
8	RE Media AS	Oslo	11-50	17	9
9	Flokk Media AS	Oslo	1-10	13	8
10	Media Performance	Oslo	1-10	12	5
11	SDG Tbwa	Oslo	11-50	9	3
12	Ahead Group Norway	Oslo	51-200	8	3
13	In Sight AS	Oslo	11-50	6	3
14	Batera Nordic	Oslo	1-10	5	4
15	Initiative Norge	Oslo	11-50	5	3
16	Papaya Design & Marketing	Oslo	1-10	5	3
17	ARCH	Oslo	1-10	5	3
18	ROI Division Oslo	Oslo	1-10	5	3
19	Molte AS	Oslo	1-10	4	1
20	Isipisi	Oslo	1-10	3	3
21	Rabalder Reklame AS	Oslo	1-10	3	3
22	Reprise Digital Norway	Oslo	11-50	3	2
23	Supernordic	Oslo	1-10	2	2
24	Mint Creatives	Oslo	1-10	2	2
25	Reklamebyrået Ernö	Oslo	11-50	2	1

Showing 25 of 79 advertising consulting firms based in Oslo, Norway

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Advertising consulting firms based in Oslo, Norway at a glance

As of Aug 28, 2026

1-10Median size (employees)

OsloLargest hub · 79 HQs

41Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

5,001-10,000

Advertising consulting firms by metro in Norway

Metro	Companies
Advertising consulting firms in Oslo	79
Advertising consulting firms in Trondheim	10
Advertising consulting firms in Kristiansand	6
Advertising consulting firms in Stavanger	6
Advertising consulting firms in Tonsberg	6
Advertising consulting firms in Bergen	5
Advertising consulting firms in Fredrikstad Viken	3

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “advertising consulting firms”, with match quality audited by blind human judging, and headquartered in Oslo, Norway.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many advertising consulting firms are there based in Oslo, Norway?

There are 79 advertising consulting firms headquartered in Oslo, Norway as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most advertising consulting firms?

Oslo leads with 79 headquartered companies, followed by Trondheim (10) and Kristiansand (6).

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 227 verified decision-maker contacts tracked across these 79 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 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.