Mark King Online

What Mark King Online does

Mark King Online is a full-service online marketing agency operating under legal entity 356 Holding B.V. and headquartered in Vlissingen, Zeeland, the Netherlands. The firm is privately held and founder-led by Thomas Siahaya, with a team of approximately five to six people delivering strategy, web development (primarily WordPress), SEO, Google Ads, social media advertising, content creation, email marketing, analytics, and ongoing WordPress maintenance to small and mid-sized businesses. Its service mix combines one-off project work (websites, campaigns, content) with limited recurring revenue from tiered WordPress Maintenance subscriptions priced at €799/year (Basis) and €999-€1,199/year (Pro).

The agency's go-to-market is regional-first, anchored in Zeeland and explicitly targeted at the Zeelandic market with Dutch-language content, regional client references such as Omroep Zeeland and Fortis Korfbal, and a "Go-to-Gele" regional positioning. Beyond the Dutch home market it has executed engagements referenced in South Africa and Australia, indicating cross-border delivery capability without a formal international entity or local hires. Its published methodology draws on Simon Sinek's Golden Circle (Why/How/What) framework, and case studies span sports clubs, government-adjacent regional broadcasters, and SMBs across multiple verticals, indicating a deliberately diversified client base rather than a single anchor vertical.

Commercially, Mark King Online monetizes primarily through project-based fees, monthly SEO/ads retainers, and a small but growing maintenance subscription book. There are no publicly disclosed funding rounds, acquisitions, leadership changes beyond the founder, or revenue figures; pricing is kept at SMB-accessible levels. The firm competes against other regional Dutch digital agencies and freelance specialists rather than global network agencies, and its operating base, language mix, and pricing signal a localized service business rather than a scalable platform play.

Name

Mark King Online

Legal name

356 Holding B.V.

Website

https://markking.nl

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

1–10 employees

Short description

Mark King Online is a founder-led, full-service online marketing agency in Vlissingen, Zeeland (Netherlands), delivering WordPress development, SEO, Google Ads, content, and maintenance subscriptions to small and mid-sized businesses, with regional depth and select cross-border engagements.

Ownership category

akta.pro rank

Product category

Digital Marketing Services

NAICS

Advertising Agencies (541810), Advertising, Public Relations, and Related Services (5418)

SIC

Services-Advertising (7310), Services-Advertising Agencies (7311)

akta.pro primary industry

Marketing Automation & Campaign Management CRM (HDAEAFAB)

akta.pro secondary industries

Product & Brand PR (Consumer & B2B) (BPAFADAH), Reputation Management & Online PR (BPAFADAN)

Keywords

• Digital marketing services
• Online strategy consulting
• WordPress web development
• Search engine optimization
• Content creation services

Headquarters

HQ city

Vlissingen

HQ country

Netherlands

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Online Strategie & Consulting: Strategy sessions and advisory services to help businesses translate company vision into online strategy using the Golden Circle framework.
2. Website Development & Webhosting: Design, development, and hosting of websites and webshops using WordPress CMS. Includes domain registration, technical management, and ongoing site management.
3. Online Marketing Services (SEO, SEA, Social Media): Digital marketing services including SEO optimization, Google Ads (SEA), social media advertising and management. Revenue based on project fees or retainer arrangements with budget passed through for ad spend.
4. Content Creation: Creation of videos, photos, texts and other content for online platforms and marketing campaigns.
5. E-mail Marketing: Setup and management of email newsletters and campaigns using MailChimp and similar platforms, including template design and campaign execution.
6. WordPress Maintenance Packages: Annual subscription-based maintenance packages for WordPress sites including security updates, backups, speed optimization, and ranking improvements. Two tiers: Uitstekend (€799/year) and Uitstekend + Ranking (€999/year first year, €1199/year thereafter).

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels9 records

Core offering

Mark King Online is a full-service online marketing bureau (agency) based in Vlissingen, Zeeland, Netherlands. The company delivers integrated digital marketing services including online strategy consulting, custom WordPress website and webshop development, SEO optimization, Google Ads (SEA) campaign management, social media marketing, content creation (video, photography, copywriting), and email marketing via MailChimp. The agency also offers recurring WordPress maintenance packages and serves primarily SMB clients across Zeeland with select international projects.

Product overview

Mark King Online is a full-service online marketing agency offering an integrated portfolio of digital marketing services and solutions. The core offerings include Online Strategie (online strategy consulting), Online Marketing (multi-channel campaigns), Website Bouwen (custom web development), SEO Optimalisatie, Google Ads management, E-mail Marketing, Content Creatie, and Analytics services. The company operates primarily on WordPress CMS and offers two WordPress maintenance packages: Uitstekend (€799/year) and Uitstekend + Ranking (€999-1199/year). Additional service offerings include a Gratis Site Check for free website audits. All services are delivered through a team of specialists covering strategy, Google Ads/Analytics, copywriting, web development, and app development, unified under the 'Samen Online Succesvol' (Together Online Successful) approach.

Differentiator

Problem solved

Functional benefit

Products and services

• Online Strategie (Online Strategy Consulting) Strategic consulting service that helps businesses and institutions translate their company vision into an online strategy through structured Online Strategie Sessies, using Simon Sinek's Golden Circle framework to define WHY, HOW, and WHAT.
• Website Bouwen (WordPress Web Development) Custom website and webshop design, development, and hosting using WordPress CMS, focused on usability, customer journey, searchability, activation, and relevant content (video, text, photo, illustration).
• SEO Optimalisatie (Search Engine Optimization) Comprehensive SEO services including site scanning, technical optimization, keyword selection, copywriting, and ongoing search engine visibility improvements to help websites rank in Google.
• Adverteren op Google (Google Ads Management)
• Online Marketing (Multi-Channel Campaign Management) Comprehensive online marketing services including social media marketing, content marketing, and multi-channel campaign management across platforms such as Instagram, Facebook, LinkedIn, and Snapchat, including retargeting campaigns.
• Content Creatie (Content Creation) Content creation services including video production, photography, copywriting, and visual design for online platforms, social media, and marketing campaigns, following the philosophy 'Content is King. And Video is the Content Kings Crown.'
• E-mail Marketing Email marketing services including newsletter setup, template design, campaign creation, personalization, and integration with social media retargeting for maximum effectiveness, using MailChimp and similar platforms.
• Analyseren (Analytics & Reporting) Statistical analysis of website and social media performance using Google Analytics, providing actionable insights, readable reports, and data-driven optimization recommendations to measure successes and identify problem areas.
• WordPress Onderhoudspakket Uitstekend Annual WordPress maintenance package at €799/year covering weekly management, WordPress core/plugin/theme updates, weekly backups, 24/7 uptime monitoring, and 30 minutes monthly phone support.
• WordPress Onderhoudspakket Uitstekend + Ranking Enhanced annual WordPress maintenance package at €999-1,199/year adding monthly speed optimizations, dead link checks, and email statistics reporting on top of the Uitstekend package.
• Gratis Site Check (Free Website Audit) Free website audit service providing evaluation of current site performance, identification of improvement opportunities, and recommendations for online success through a video call consultation.

Quantifiable outcome

• Achieved #1 ranking on Google for 'adverteren in Zeeland' for Omroep Zeeland
• +3 more outcomes

Named customers9 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration10 records

AI capability8 records

Feature5 records

Partnerships

One partnership is on record.

• WordPresscoreTechnology or IntegrationWordPress is the primary CMS platform used for all client website builds and the agency's own site. Mark King specializes in WordPress development, maintenance, and security management. The agency offers WordPress maintenance packages.

Scale indicators4 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Greenhouse Group: Greenhouse Group is a Dutch digital agency network with expertise in performance marketing, SEO, content, and technology. Comparable as a Benelux peer operating the same multi-channel digital marketing model at slightly larger scale.
• Adwise: Adwise is a Dutch performance-marketing agency specializing in Google Ads, SEO, social advertising and data-driven campaigns for mid-market clients. It is a direct comparable in service mix, channel expertise, and Dutch SMB/mid-market positioning.
• Buro90: Buro90 is a Dutch creative/digital agency combining branding, web development, and online marketing for SMB clients. It is a direct peer in size, geography, and service composition to Mark King Online's Zeeland-focused offering.

Broad incumbents

• Dept Agency: Dept is a large, globally operating Dutch-headquartered digital agency offering strategy, creative, web development, and performance marketing across enterprise clients. Relevant as the broader Dutch incumbent whose service portfolio closely mirrors Mark King Online's stack but at vastly greater scale.
• WPP (Wunderman Thompson / VML): WPP's digital and data agencies (VML, Wunderman Thompson) provide advertising, CRM, content, and technology services globally. Relevant as a broad incumbent demonstrating the large-scale end of the same services Mark King Online delivers locally.
• iO (formerly Intracto): iO is a Belgium/Netherlands-headquartered full-service digital agency combining strategy, technology, content, and marketing. Comparable as a broader Benelux incumbent offering the same end-to-end online marketing, web development and content stack Mark King Online provides.

Others

• Mailchimp: Mailchimp (Intuit) is a leading email marketing and marketing automation platform that Mark King Online uses to deliver client campaigns. Relevant as an ecosystem enabler whose self-serve tools increasingly disintermediate agency email-marketing services.
• Semrush: Semrush is a leading SEO and marketing analytics platform whose tools are widely used by agencies like Mark King Online. Relevant as an enabling/thematic player whose productization of SEO workflows is both a tool for and a competitive threat to traditional SEO service lines.

Regional players

• Yoast: Yoast is a Dutch-headquartered WordPress SEO plugin vendor used broadly by WordPress-focused agencies. Relevant as a regional (Netherlands) ecosystem peer whose tooling directly supports Mark King Online's WordPress-centric delivery model and SEO practice.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/markkingonline
• Facebookfacebook.com/markkingonline
• LinkedInlinkedin.com/company/markking

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Mark King Online