SEO Agencies in Belgium

10 SEO agencies are listed in Belgium. 10 have been assessed on the Agency List Score as of September 2026; the highest-ranked is Blue2purple at 97.2.

Ranked · 8 of 10 assessed

Ordered by Agency List Score
#1 of 10 assessed
Blue2purple
97

Empowering clients with data-driven media buying and creative marketing.

Content MarketingSearch Engine OptimizationSocial Media Management (SMM)
#2 of 10 assessed
Semopti
96

Website design, SEO, and Google Ads built around data analysis

Search Engine OptimizationWebsite Optimization
#3 of 10 assessed
Universem
95

Data-driven digital marketing with AI-enhanced strategies

Marketing AutomationSearch Engine OptimizationWebsite Optimization
#4 of 10 assessed
Plant a Flag
91

Marketing strategies for SMEs and non-profits with impactful ideas

Ads ManagementAnalytics & ReportingContent Marketing
#5 of 10 assessed
User Growth
78

SEO and content marketing for small businesses and SAAS

Content MarketingConversion Rate OptimizationEmail Marketing
#6 of 10 assessed
Clicktrust
73

SEO and PPC services for inbound lead capture and search visibility

Search Engine OptimizationWebsite Optimization
#7 of 10 assessed
DauntlessDonkey
73

Digital strategy, SEO, and paid campaigns for biotech and pharmaceutical companies

Analytics & ReportingLead GenerationMarketing Automation
#8 of 10 assessed
Co-carré
73

Visual identity, brochures, and print materials from a Brussels design studio

Ads ManagementAnalytics & ReportingContent Marketing

Also in Belgium · 2 not ranked here

0 have not yet been assessed on the Agency List Score. Alphabetical.

About this ranking

What this page ranks

This page ranks 8 of the 10 assessed SEO agencies in Belgium — the ones carrying a published score — out of 10 listed.

The score measures how well an agency documents its own work in public — named clients, quantified outcomes, and whether those outcomes are attributed to the agency rather than described as the client's own results. It does not measure client satisfaction, price, or availability.

Cohorts and awards

Agencies are compared within a cohort — here, SEO in Belgium. A cohort must be large enough to express the band being awarded: at least 8 assessed agencies for a top 25% award, 20 for top 10%, 40 for top 5%, and 300 for top 1%. This one holds 10, so the strongest award available here is top 25%.

A further 2 were assessed and no published evidence of their work was found, so no score is shown for them.

Read the full methodology

Paid placement

Partner agencies can buy a labelled placement block above the ranking on this page. It is always marked as paid and is never mixed into the ranked list.

Placement is paid; it does not affect the ranking, cohort membership, or any agency's score. Ranking position, cohort membership and the score itself are not for sale.

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Questions

How many SEO agencies are in Belgium?
10 are listed on Agency List in Belgium. 10 of them have been assessed on the Agency List Score as of September 2026, and 8 of those carry a published score.
Which SEO agency in Belgium is ranked highest?
Blue2purple, with an Agency List Score of 97.2, ranks #1 of 10 assessed agencies in SEO in Belgium.
Why are 2 SEO agencies listed here but not ranked?
0 of the 10 listed have not yet been assessed on the Agency List Score. A further 2 were assessed and no published evidence of their work was found, so no score is shown for them. They each have a profile and are listed below the ranking, alphabetically, rather than being hidden or mixed into it.
How is the ranking determined?
By Agency List Score, within the SEO in Belgium cohort of 10 assessed agencies. The score is computed from evidence published on each agency's own website: named clients, quantified outcomes, and whether the outcome is attributed to the agency. Paid placement does not affect it.