Wilco de Kreij – GrowOS

Here’s What You Get:

Wilco de Kreij – GrowOS is an AI-powered marketing automation system created by Wilco de Kreij, designed to function like a complete AI marketing department for entrepreneurs, creators, agencies, and small businesses. It runs through Claude Code and combines pre-built marketing workflows with training, customization, and integrations.

Overview

GrowOS is built around the idea of moving from using AI through individual prompts to operating a connected marketing system. The system can research a market, create content, develop ads and sales pages, edit videos, and prepare or publish marketing assets while maintaining a consistent brand voice.

What’s Included

1. 30+ Expert Marketing Workflows

• Newsletter creation
• Twitter/X, LinkedIn and Facebook content
• Facebook ads and AI-generated ad images
• Landing pages and sales pages
• Video editing with subtitles, cuts and animations
• Carousels
• YouTube thumbnails
• Competitor research
• Content strategy and planning
• Marketing campaign development

The workflows share a voice profile and can use feedback to improve future outputs.

2. Run the System Training
Step-by-step training showing how to install and operate GrowOS, from understanding Claude and the workflows through to creating and publishing marketing assets.

3. Automate Anything Training
Teaches users how to create their own AI workflows for repetitive business tasks using plain English, without needing to code or rely on platforms such as Zapier or Make.

4. Expert Upgrade
Allows GrowOS to be trained on a specific industry by incorporating competitor content, expert material, market research and other niche-specific information.

5. Connection Kit
Connects the system to existing business tools such as email platforms, social schedulers and advertising accounts so workflows can move beyond content generation into publishing and scheduling.

6. Team Operations
Training for using GrowOS with VAs, assistants or business partners, including permissions and workflow handoffs.

Key Concept

The major distinction of GrowOS is systemization.

Instead of: Prompt → AI response → manually fix → manually publish

the intended workflow is closer to:

Research → strategy → creation → quality check → improvement → publishing

The system can also be scheduled to perform recurring tasks, such as preparing social posts or newsletters automatically.

Who Is It For?

GrowOS is particularly suited to:

• Entrepreneurs and online business owners
• Marketing agencies
• Content creators
• Coaches and consultants
• E-commerce businesses
• Small marketing teams
• Freelancers
• Businesses producing content across multiple channels

It is especially useful for people who already know what they want their marketing to accomplish but don’t have the time or staff to execute every repetitive task manually.

Creator

Wilco de Kreij says he has built and sold three companies, served more than 50,000 customers across 150+ countries, and has 22 years of marketing experience. He developed GrowOS initially for his own business before turning the system into a product.

Overall

Wilco de Kreij – GrowOS is best categorized as an AI Marketing / Claude Code / Marketing Automation program. Its main value is not simply a collection of prompts, but a connected set of 30+ marketing workflows designed to turn AI into an ongoing marketing operation.