GRO Marketing
GRO Marketing is a UK-based full-service digital marketing agency in Hessle, East Yorkshire, offering website design, SEO, social media, PPC, email marketing, and hosting to enterprise and SMB clients across the UK.
- Company typePrivate
- Founded2016
- HeadquartersHessle, United Kingdom
- Headcount11–50
- GTM typeB2B
- OfferingServices
What GRO Marketing does
GRO Marketing Limited is a UK-based, full-service digital marketing agency headquartered in Hessle, East Yorkshire, operating since 2016 as a subsidiary of Harlen Ltd. The company delivers website design and development (with mobile-first responsive builds across WordPress, WooCommerce, Shopify, and Magento), search engine optimization (organic, technical, and local), social media management and paid social, pay-per-click advertising, email marketing, app development, and website hosting bundled with security, CDN, and backup services. Its primary geographic focus is Hull and East Yorkshire with national UK reach. GRO serves a horizontal mix of enterprise and SMB clients across manufacturing, retail, e-commerce, facilities management, and industrial sectors, with named anchors including Starrett, British Garden Centres, Bradbury Group, Service Works Global, Dortek, DKL Metals, and Grosvenor Group.
The company operates a project- and retainer-based professional services revenue model with quote-based, non-public pricing. Two proprietary tools — GRO Web Leads (visitor company identification analytics) and GROSofi (white-labelled website management technology) — provide modest productization of agency IP. The agency's go-to-market is sales-led and direct: clients are acquired through website forms, phone (01482 333833), email, and organic search visibility on terms like "SEO Agency Hull" and "Website Design Hull." In January 2026, GRO was acquired by OuterBox, a portfolio company of WILsquare Capital, extending coverage into the US multifamily, student housing, and senior living residential community vertical.
GRO Marketing is regionally recognized, including Top 3 Marketing Agency in East Riding (Three Best Rated, 2023), Northern Enterprise Awards winner, and The Drum Recommends Digital Awards finalist (2020, 2021). The company operates as a private limited company (registration 10257553) with no disclosed venture or private equity investment prior to the OuterBox acquisition.
GRO Marketing firmographics
Firmographics- Name
- GRO Marketing
- Legal name
- GRO Marketing Limited
- Website
- https://gro-marketing.co.uk
- Company type
- Private
- Founded year
- 2016
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- GRO Marketing is a UK-based full-service digital marketing agency in Hessle, East Yorkshire, offering website design, SEO, social media, PPC, email marketing, and hosting to enterprise and SMB clients across the UK.
- Ownership category
- akta.pro rank
GRO Marketing industry classification
Industry- Product category
- Digital Marketing Services
- NAICS
- Advertising Agencies (54181), Advertising Agencies (541810), Advertising, Public Relations, and Related Services (5418)
- SIC
- Services-Advertising Agencies (7311), Services-Advertising (7310)
- akta.pro primary industry
- Search Engine Marketing (SEM) / Paid Search (PPC) (BPAFACAA)
- akta.pro secondary industry
- Search Engine Marketing (SEM) / Paid Search (PPC) Management (MPAAACAB)
Keywords
Where GRO Marketing is headquartered
LocationHeadquarters
- HQ city
- Hessle
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
GRO Marketing business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Technology or R&D
Revenue model
- Digital Marketing Services: Revenue generated from providing digital marketing services including website design, SEO, social media management, PPC advertising, email marketing, and app development. Services are typically project-based or retainer arrangements.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Monthly | Custom project-based pricing tailored to client requirements |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels5 records
GRO Marketing product offering
Product offeringCore offering
GRO Marketing is a full-service digital marketing agency that designs, builds, and promotes websites for UK businesses. Its core deliverables span website design, SEO, social media management, PPC, email marketing, app development, website hosting, and e-commerce builds, supplemented by its proprietary GRO Web Leads and GROSofi platforms. Engagements are sold as project-based and retainer services to local and regional businesses seeking an end-to-end marketing partner.
Product overview
GRO Marketing is a full-service digital marketing agency based in Hull, UK. The company operates as a unified service offering rather than a platform-plus-modules architecture, providing integrated digital marketing services including Website Design (bespoke, responsive web development), SEO Services (organic, technical, local), Social Media Services (organic and paid), Web Leads (visitor analytics), App Development, Email Marketing, PPC Advertising, and Website Hosting. The agency also specializes in eCommerce solutions using WooCommerce, Shopify, and Magento platforms. Services are designed to work together as a comprehensive digital marketing solution, though the company was acquired by OuterBox/WILsquare Capital in January 2026.
Differentiator
Problem solved
Functional benefit
Products and services
- Website Design Custom website design service for UK businesses needing responsive, mobile-first sites that align with brand and conversion goals.
- SEO Services Search engine optimization service including on-page, off-page, technical SEO, and content strategy to improve organic rankings and traffic.
- Social Media Services Social media management, content creation, and community engagement service for UK business brands across major platforms.
- PPC (Pay-Per-Click) Services Paid search and display advertising management service covering campaign setup, bidding, creative, and ongoing optimization.
- Email Marketing Email campaign design, automation, and management service to nurture audiences and drive conversions for clients.
- GRO Web Leads Proprietary lead-intelligence and online-lead generation platform used to source and qualify business enquiries for clients.
- App Development Mobile and web application design and development service for clients needing custom app functionality alongside their website.
- Website Hosting Managed website hosting service backed by a 99.99% uptime SLA, Cloudflare CDN, and associated security infrastructure.
- eCommerce Solutions End-to-end e-commerce design and build service for online retailers, executed on WooCommerce, Shopify, and Magento platforms and integrated with hosting.
Quantifiable outcome
- DKL Metals ranked #1 on page 1 of Google for 'Solder Bar Manufacturer UK'
- +2 more outcomes
Companies that use GRO Marketing
Customer profileNamed customers7 records
Segments3 records
Ideal customer profiles2 records
GRO Marketing technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration1 record
Feature2 records
GRO Marketing partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Harlen LtdparentHarlen Ltd is the parent company of GRO Marketing Ltd. GRO Marketing is part of the Harlen Ltd corporate group, with company registration number 06595622.
Scale indicators1 record
Recent moves5 records
Expansion highlights4 records
GRO Marketing competitors and assessment
Company assessmentDirect peers
- Vertical Leap: UK SEO and digital marketing agency with strong emphasis on SEO and content — closely comparable to GRO's organic search and content marketing offering.
- Evoluted: Sheffield-based UK digital agency offering web design, development, SEO, and digital marketing — directly comparable in mid-market UK digital agency positioning.
- Klood Digital: UK-based full-service digital agency covering web design, SEO, PPC, and social media — directly comparable service mix and SMB-to-mid-market client base.
- Hallam Internet: Nottingham-based UK full-service digital marketing agency offering SEO, PPC, web development, and content strategy. Closest UK-based full-service peer with comparable mid-market client focus.
- OuterBox: Acquirer of GRO Marketing and a US-based digital marketing agency specialising in e-commerce, SEO, PPC, and web design. Direct overlap in core services (SEO, PPC, web design) and now corporate parent.
- Click Consult: UK digital agency specialising in SEO, PPC, and digital PR for mid-market and enterprise clients — comparable on paid search and organic search capabilities.
- Kaizen: UK digital marketing agency focused on SEO, content, and paid media for enterprise clients — comparable service stack and UK market presence.
Emerging players
- Blue Array: UK SEO-focused agency with adjacent digital marketing services — strong overlap with GRO's organic search offering though narrower in scope.
- Pole Star Digital: UK digital agency specialising in SEO, content, and digital PR — overlapping with GRO's SEO and content capabilities, primarily mid-market focus.
Regional players
- Receptional: UK digital marketing agency offering SEO, PPC, and web design — comparable service mix and UK regional orientation, similar mid-market client base.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat3 records
Key risks6 records
Key highlights6 records
Customer concentration
GRO Marketing social profiles
Digital presenceGRO Marketing financial estimates
Financial estimateRevenue estimate
Valuation estimate
GRO Marketing leadership team
Management profileNumber of profiles
GRO Marketing funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
GRO Marketing M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about GRO Marketing
What does GRO Marketing do?
GRO Marketing is a full-service digital marketing agency that designs, builds, and promotes websites for UK businesses. Its core deliverables span website design, SEO, social media management, PPC, email marketing, app development, website hosting, and e-commerce builds, supplemented by its proprietary GRO Web Leads and GROSofi platforms. Engagements are sold as project-based and retainer services to local and regional businesses seeking an end-to-end marketing partner.
Is GRO Marketing a public or private company?
GRO Marketing is a private company. It is classified as private equity controlled and is currently operating.
When was GRO Marketing founded?
GRO Marketing was founded in 2016. It employs 11 to 50 people.
Where is GRO Marketing based?
GRO Marketing is headquartered in Hessle, United Kingdom, in the Europe region.
How does GRO Marketing make money?
One revenue line is on record: digital Marketing Services.
Who are GRO Marketing's main competitors?
Direct peers on record are Vertical Leap, Evoluted, Klood Digital, Hallam Internet, OuterBox, Click Consult and Kaizen. Emerging players are Blue Array and Pole Star Digital. Receptional is listed as a regional player.
Does GRO Marketing have an API?
No public API is recorded for GRO Marketing.
What industry is GRO Marketing in?
GRO Marketing's product category is Digital Marketing Services. Its primary akta.pro industry code is BPAFACAA, Search Engine Marketing (SEM) / Paid Search (PPC), with a secondary code of MPAAACAB, Search Engine Marketing (SEM) / Paid Search (PPC) Management. Its NAICS code is 54181 and its SIC code is 7311.