Company lists · Data refreshed September 2026

Top 25 Conversion funnel optimization firms based in the Netherlands

RevenueBase identified 146 conversion funnel optimization firms headquartered in the Netherlands as of September 2026 and tracks 678 professional contacts across them, including 270 with verified work emails. Amsterdam is the largest hub.

This list covers conversion funnel optimization firms headquartered in the Netherlands, 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 19, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review
146Companies
678Contacts tracked
270Verified emails
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The 25 largest conversion funnel optimization firms based in the Netherlands

Ranked by team size
Top 25 of 146 conversion funnel optimization firms based in the Netherlands, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to conversion funnel optimization firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceBreda, NetherlandsHQ checked Sep 19, 202651-200109 contacts →

Indirect evidence

“Grizzly New Marketing is een gespecialiseerd SEO marketingbureau in Nederland (Breda en Rotterdam), België (Antwerpen-Berchem) en de Verenigde Staten (New York).”

Source: RevenueBase Database · checked Sep 19, 2026
2Indirect evidenceHaarlem, NetherlandsHQ checked Sep 19, 202651-20045 contacts →

Indirect evidence

“Blauwe Monsters is an ambitious and innovative online marketing agency.”

Source: RevenueBase Database · checked Sep 19, 2026
3Strong evidenceZwolle, NetherlandsHQ checked Sep 19, 202611-5034 contacts →

Strong evidence

“Tweakwise is the specialist and market leader in the Benelux in the field of conversion optimization in e-commerce.”

Source: RevenueBase Database · checked Sep 19, 2026
4Indirect evidenceAmsterdam, NetherlandsHQ checked Sep 19, 20261-1026 contacts →

Indirect evidence

“We’re The Fellas Ads – a performance marketing agency based in the center of Amsterdam.”

Source: RevenueBase Database · checked Sep 19, 2026
5Indirect evidenceAlkmaar, NetherlandsHQ checked Sep 19, 202611-5024 contacts →

Indirect evidence

“Wij zijn PaperDigits.”

Source: RevenueBase Database · checked Sep 19, 2026
6Partial evidenceUtrecht, NetherlandsHQ checked Sep 19, 202611-5019 contacts →

Partial evidence

“Online Dialogue is known as a frontrunner in the field of optimization and experimentation since 2009.”

Source: RevenueBase Database · checked Sep 19, 2026
7Strong evidenceAmsterdam, NetherlandsHQ checked Sep 19, 202651-20018 contacts →

Strong evidence

“ClickValue is an Amsterdam based Conversion Optimization Agency fully focused on sustainable online growth.”

Source: RevenueBase Database · checked Sep 19, 2026
8Indirect evidenceVeenendaal, NetherlandsHQ checked Sep 19, 202611-5018 contacts →

Indirect evidence

“Bij MarketingConcurrent helpen wij bedrijven meer rendement uit hun marketing te halen, met volledige ontzorging van A tot Z.”

Source: RevenueBase Database · checked Sep 19, 2026
9Indirect evidenceZwaag, NetherlandsHQ checked Sep 19, 202611-5014 contacts →

Indirect evidence

“We geloven dat succesvolle performance marketing meer is dan alleen betaald adverteren en e-mailen.”

Source: RevenueBase Database · checked Sep 19, 2026
10Indirect evidenceAmsterdam, NetherlandsHQ checked Sep 19, 202611-5013 contacts →

Indirect evidence

“We generate customers for brands with our unique mix of marketing, sales and best in class technology.”

Source: RevenueBase Database · checked Sep 19, 2026
11Indirect evidenceAmsterdam, NetherlandsHQ checked Sep 19, 202651-20012 contacts →

Indirect evidence

“We are FRST Media, a global leader in Performance Marketing and Lead Generation.”

Source: RevenueBase Database · checked Sep 19, 2026
12Indirect evidenceRotterdam, NetherlandsHQ checked Sep 19, 202611-5011 contacts →

Indirect evidence

“Performance based marketing voor e-commerce bedrijven.”

Source: RevenueBase Database · checked Sep 19, 2026
13Indirect evidenceMierlo, NetherlandsHQ checked Sep 19, 20261-109 contacts →

Indirect evidence

“In de afgelopen jaren hebben wij ons meermaals bewezen in de praktijk, dit heeft geresulteerd in een mooi trackrecord.”

Source: RevenueBase Database · checked Sep 19, 2026
14Indirect evidenceTilburg, NetherlandsHQ checked Sep 19, 20261-109 contacts →

Indirect evidence

“Caramelo is een gedreven, creatief en veelzijdig (full service) online marketing bureau die streeft naar een optimale samenwerking met haar klanten.”

Source: RevenueBase Database · checked Sep 19, 2026
15Indirect evidenceAmsterdam, NetherlandsHQ checked Sep 19, 20261-109 contacts →

Indirect evidence

“Wij zijn een groeigericht & ROI-gedreven online marketing bureau.”

Source: RevenueBase Database · checked Sep 19, 2026
16Indirect evidenceAmsterdam, NetherlandsHQ checked Sep 19, 202611-509 contacts →

Indirect evidence

“E-commerce brands invest heavily in growth, but too much of it gets lost in misaligned strategies and short-term tactics.”

Source: RevenueBase Database · checked Sep 19, 2026
17Partial evidenceAmsterdam, NetherlandsHQ checked Sep 19, 202611-509 contacts →

Partial evidence

Conversion Company is an Amsterdam based Digital accelerator for leading companies.”

Source: RevenueBase Database · checked Sep 19, 2026
18Indirect evidenceDeventer, NetherlandsHQ checked Sep 19, 202611-508 contacts →

Indirect evidence

“Online groei start hier”

Source: RevenueBase Database · checked Sep 19, 2026
19Indirect evidenceVeenendaal, NetherlandsHQ checked Sep 19, 202611-508 contacts →

Indirect evidence

“Als online marketingbureau begrijpen we dat het hebben van een mooie website niet voldoende is.”

Source: RevenueBase Database · checked Sep 19, 2026
20Partial evidenceZwolle, NetherlandsHQ checked Sep 19, 20261-107 contacts →

Partial evidence

“Wij zijn Funnel Optimizers, online marketingbureau gespecialiseerd in performance marketing, website optimalisatie en audits & advies op basis van analyse.”

Source: RevenueBase Database · checked Sep 19, 2026
21Partial evidenceGouda, NetherlandsHQ checked Sep 19, 20261-107 contacts →

Partial evidence

“Re:publish is een dynamisch en groeiend Conversie Marketing Netwerk.”

Source: RevenueBase Database · checked Sep 19, 2026
22Indirect evidenceHalfweg, NetherlandsHQ checked Sep 19, 20261-107 contacts →

Indirect evidence

“CutTheWeb is an online marketing company.”

Source: RevenueBase Database · checked Sep 19, 2026
23Partial evidence’s-hertogenbosch, NetherlandsHQ checked Sep 19, 20261-106 contacts →

Partial evidence

“Douro Media is een online marketing bureau, gespecialiseerd in zoekmachine adverteren, zoekmachine optimalisatie, e-mailmarketing, conversie optimalisatie en het geven van…”

Source: RevenueBase Database · checked Sep 19, 2026
24Indirect evidenceGroningen, NetherlandsHQ checked Sep 19, 20261-106 contacts →

Indirect evidence

“Wij helpen bedrijven aan meer leads en sales uit internet!”

Source: RevenueBase Database · checked Sep 19, 2026
25Partial evidenceAmsterdam, NetherlandsHQ checked Sep 19, 20261-106 contacts →

Partial evidence

“Symblings is uw digitale marketing specialist en biedt conversies diensten op het gebied van Marketing, IT en Sales.”

Source: RevenueBase Database · checked Sep 19, 2026

Showing 25 of 146 conversion funnel optimization firms based in the Netherlands

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Conversion funnel optimization firms based in the Netherlands at a glance

As of Sep 19, 2026
39.8%Verified-email coverage
4.6Average contacts per company
1-10Median size (employees)
15.1%Largest-city concentration · Amsterdam
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
118
11-50
23
51-200
5

Email recency for this list is measured worldwide rather than for Netherlands, so it is reported there. Company counts and contact totals on this page are exact for Netherlands, over 146 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 conversion funnel optimization firms, 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 the Netherlands whose own description of what they do matches “conversion funnel optimization firms”. 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 conversion funnel optimization firms), 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 conversion funnel optimization firms, and records with no verified work email. Companies headquartered outside Netherlands 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, 270 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 19, 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

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 conversion funnel optimization firms, 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 conversion funnel optimization firms are there based in the Netherlands?

RevenueBase identified 146 conversion funnel optimization firms headquartered in the Netherlands 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?

Grizzly NEW Marketing, headquartered in Ng, tops this list with the largest team on record.

Which city has the most conversion funnel optimization firms?

Amsterdam leads with 22 headquartered companies, followed by Groningen (6) and Rotterdam (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 270 verified decision-maker contacts tracked across these 146 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 19, 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.