Generated +$50M for +73 E-com brands & Info Products in 12 countries

World class marketing team for ambitious E-commerce & Info-Product businesses

In a world of quick-fixes and shallow advertising strategies, we help our clients build real brands and scaleable businesses through a long-term approach to growth

Free Performance Analysis

Official partners of leading platforms:

Our services

+5 years of experience and one E-com brand exit.

Paid advertising

We're a lean team of 3 full-time paid advertising specialists with experience of handling accounts spending +$1M/month.

Creative execution

We take care of your content management from A-Z. We craft the perfect content mix consisting of static ads, GIF ads, UGC & Professional video ads.

Funnel & strategy

We craft strategies and funnels designed to take potential customers from a complete unaware stage to being an educated buyer.

Success cases

We don’t just drive short-term wins — and we're proud to say that our average retention is 19.7 months. (Updated May 2025)

Trusted by Thousands of Travelers

Owayy (now campanyon)

XXX% Revenue Increase

Opened up +4 markets

+1.5 year retention

Europe’s #1 Dog Owner Apparel Brand

DogCoach

+XX% revenue growth

X markets opened

+3 years retention

From Local Boutique to Scandinavian Icon

Åberg Copenhagen

+2.000% revenue growth in 3 years

From DK to Scandinavian fashion brand

+3 years retention

Sweden's Biggest Fitness Influencer

Hampus Botvid

XX% CPA Decrease

XX% Qualified Lead Ratio Increase

Scandinavia’s #1 Soil Delivery Service

Svedberga

XX% CPA Decrease

XX% Qualified Lead Ratio Increase

Premium Plus-Size Fashion

Curved

XXX% Revenue Increase

XXX% ROAS Increase

+3 year retention

Results-Driven Health Reset

Louise Bruun

XXX% Revenue Increase

XXX% ROAS Increase

+2 year retention

Effortless Style, Remarkable Growth

The Shirt

XXX% Revenue Increase

XXX% Spend Increase

+3 year retention

Europe's #1 Glamping Booking Site

Owayy (now campanyon)

+437% Revenue Increase

Opened up +4 markets

+1.5 year retention

Europe’s #1 Dog Owner Apparel Brand

DogCoach

+120% revenue growth

Opened up +4 markets

+3 years retention

From Local Boutique to Scandinavian Icon

Åberg Copenhagen

+2.000% revenue growth in 3 years

From Local to Scandinavian Fashion Brand

+3 years retention

Sweden's Biggest Fitness Coach

Hampus Botvid

40% Cheaper Conversions

41% Cheaper Leads

Scandinavia’s #1 Soil Delivery Service

Svedberga

142% Revenue Growth in 2024

93% AOV Increase

+15 months retention

Denmark's #1 Plus Size Fashion Store

Curved

From $578K/year to $1.9M in 24 months

63% ROAS Increase

+4 year retention

#1 Health & Fitness Course in Denmark

Louise Bruun

Increased ROAS from 5.2x to 6.1x

22% Revenue Growth YoY

+3 year retention

Effortless Style, Remarkable Growth

The Shirt

From $15K/month to $81K in 16 months

275% ROAS Increase

+4.2 year retention

Trusted by Thousands of Travelers

Owayy (now campanyon)

XXX% Revenue Increase

Opened up +4 markets

+1.5 year retention

Europe’s #1 Dog Owner Apparel Brand

DogCoach

+XX% revenue growth

X markets opened

+3 years retention

From Local Boutique to Scandinavian Icon

Åberg Copenhagen

+2.000% revenue growth in 3 years

From DK to Scandinavian fashion brand

+3 years retention

Sweden's Biggest Fitness Influencer

Hampus Botvid

XX% CPA Decrease

XX% Qualified Lead Ratio Increase

Scandinavia’s #1 Soil Delivery Service

Svedberga

XX% CPA Decrease

XX% Qualified Lead Ratio Increase

Premium Plus-Size Fashion

Curved

XXX% Revenue Increase

XXX% ROAS Increase

+3 year retention

Results-Driven Health Reset

Louise Bruun

XXX% Revenue Increase

XXX% ROAS Increase

+2 year retention

Effortless Style, Remarkable Growth

The Shirt

XXX% Revenue Increase

XXX% Spend Increase

+3 year retention

Watch All Success Cases

Who do we work with?

We’re an incredibly lean team of 4 people helping E-commerce brands grow through paid advertising in +12 countries. We work with established companies that have a deep understanding of their internal business metrics and success KPI’s.

Our clients understand the value of retention and are looking for long-term growth, and we deliver that in form of hardcore conversions that drives growth and profitability at the same time

Yes

Established E-commerce brands that knows their key metrics

Wants a long-term partnership

Wants to invest in the best marketing team

Can handle aggressive growth

Does not have a deep understanding of key metrics

Cares more about the price than the results

Success is based on short-term fixes / results

+XX%Thinks a marketing team will run the entire businessrevenue growth

Apply for a free performance review by Lucas

Lucas

Sign up today to get a taste of how we operate and how we can help you scale. We will analyze your entire marketing setup and show you exactly where you need to optimize to increase your revenue and profit. This includes a review of your ad accounts, website/webshop, content, and ad copies.

Analysis of your digital presence & growth potential.

A complete growth strategy to take your advertising to the next level.

We will analyse your ad accounts, copywriting, ad creatives, website / landing pages and email marketing automation.

Analysis of your best performing markets & how to expand into new markets.

30-minute live walkthrough of all our findings with our CMO.

BONUS: Customer journey analysis to show you how to increase profit by up to 80%. (9/10 businesses are missing out on this)

We require you to be able to spend $3.000 or above on your monthly advertising to qualify for our performance review.

Start the conversation with us today, by applying for a free review of your digital presence and growth potential.

Full name ^*

Email ^*

Phone number (include country code) ^*

Company ^*

Link to website / webshop ^*

How much do you want to spend on advertising on a monthly basis?

Additional information about your company

Submit application

Schedule your free Performance Review call.

Thanks for applying! For us to give you a comprehensive Performance Review, please schedule your 15-30 minute call by clicking the call below. This is required for us to continue with your application.

We will analyze your entire marketing setup and show you exactly where you need to optimize to increase your revenue and profit. This includes a review of your ad accounts, website/webshop, content, and ad copies.

The call is perfect for:

Businesses who seek to understand which improvements can be made to their current marketing strategy.

Businesses that are ready for massive growth.

Businesses looking for a proactive partner with 5+ years of E-commerce experience to make their business a priority.

Official partners of leading platforms:

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Our clients wants the best of the best

Hear what our customers say about their experience with us.

Trusted by:

Linn Radsted

Can only recommend Marcus from Complex Solution, super service minded, problem solver, creative and fast. Marcus is always available and always ready to try out new ideas. He provides weekly updates, constantly keeps an eye on conversions, ROAS, ad spend etc. We at Åberg Copenhagen look forward to a long and good collaboration, which we are very excited about so far.  Regards Needa Violaaurora CEO & founder Åberg Copenhagen

Needa from Åberg Copenhagen

We at DogCoach have had the pleasure of collaborating with Marcus & Complex Solution since 2022. During this period, DogCoach has both expanded into new markets and significantly grown the company in B2C sales. Unlike larger agencies, we experience a tremendous effort put into both understanding the brand and the company, as well as working proactively and committedly. Furthermore, Marcus always participates actively and is adept at considering the company as a whole. Here you get a comitted wingman who thinks independently and where reporting and data are done on a high level. Marcus & Team get my absolute highest recommendations.

Linn from DogCoach

Huge recommendation from here! Marcus has been managing our Facebook Ads for about 3 months now and has created impressive results throughout. We are running with a ROAS 13 on average and have made an additional revenue of 500.000kr. in the short time we have worked with him. Marcus is self-thinking and proactive and works insanely hard to create the best possible results for his clients!

Anton from Companyon

I highly recommend both Marcus and the team. We at Curved.dk have now been using them for over a year. We grow every single month, they are always ready to help and do a fantastic job. They are 100% honest and easy to talk to, so I can vouch for them at all times.  Thank you Marcus and team for the time so far, looking forward to many more months with you.

Lone from Curved

Have worked with Marcus for about a year, and it has been a very pleasant experience. Marcus always delivers on time and replies immediately. I have worked with different larger teams before, where I got a new account manager constantly, and with that, had to spend a lot of time troubleshooting. With Marcus it's nice to know that won't happen, and it saves me a lot of time. My best recommendations ⭐️⭐️⭐️⭐️⭐️

Ditte from Mondokaos

I am extremely impressed with the results. The company's communication and dedication to our campaign has been top-notch. Every week, they provide us with a video update explaining the progress and strategies being implemented to improve our results.  One of the things that I appreciate the most about Complex Solutions is their dedication to constantly improving our website to get better results with our Facebook-Ads. They have provided us with valuable feedback and suggestions on how to optimize our website for conversions, which has significantly increased our click-through rates.  Moreover, the team has been very receptive to our suggestions and ideas, and they have always been quick to implement any changes or adjustments that we have requested. This level of flexibility and willingness to listen to their clients' needs is what sets this Complex Solutions apart from others in the industry.  I highly recommend Complex Solutions for anyone looking to set up and manage their Facebook-Ads.

Maurice from Hello Floor

I had the pleasure of working with them for 3 months and in this short period of time they really exceeded all my expectations. Marcus knows what he talks about and all the communication went very smoothly. 10/10 Recommend

Benjamin from TBG

I have been working with Complex Solution for a year now, and I can confidently say it has been a fantastic experience. We have successfully built numerous brands, and the ROAS has been outstanding. I highly recommend them!

Henry from Ecoawear

We have been working with Marcus for 6 months now and are really impressed with the results he creates and the way he is able to challenge our business strategically. Marcus has been a very important resource in our expansion to other countries in Europe, where he has taken responsibility for opening and growing the different markets. Despite the fact that we work with complex products with many restrictions, we have experienced throughout the collaboration that Marcus adapts and finds the right solutions that benefit our business. We are especially pleased with the execution power we experience. A big recommendation from here!

Mads from Matetea

We had the pleasure of working with Mads and Marcus from Complex Solutions to create a beautiful webshop for our Forest Tea brand, and the experience was nothing short of outstanding. Their dedication, expertise, and commitment to our project were truly remarkable.

Brian from Forest Tea

Marcus and the rest of the team are without a doubt among the brightest minds in the industry.
We have turned to the team several times when we needed knowledge about paid advertising, digital presence and E-commerce.
A huge recommendation!

Jeppe from Advancelab

Marcus and Mads have been a pleasure to work with over the past 3 months. Our small webshop got our Facebook and Instagram ads optimized and structured - and got a much better return on investment! The thorough Monday updates helped give us a thorough insight into things and created a sense of security in the process.

Andreas from Eclipsis

Free Performance Analysis

This is how we grow your E-commerce business

New customers & retention

We see the big picture and understand the relationship between new customers and long-term growth. Too often do we see that the success criteria is a ROAS or POAS goal, which is good in the short-term until you realise you aren’t attracting nearly enough new customers. We help you understand and utilise the relationship between new customers and maximising their value.

The ROAS or gross profit on your first purchase might not matter as much as you think, which keeps you from scaling faster.

This is only possible by taking a deep dive into your current business metrics and KPI’s making sure we’re all aligned.

Awareness stages

Stagnating sales for E-commerce companies usually happens because the current marketing manager or agency doesn’t have the expertise or know-how to target all 5 awareness stages and inspire/educate the complete unaware segment and turn them into a loyal customer. This means that your company is only able to convert the 3% of the market that is looking to buy right now - when that segment hits a ceiling you will have a hard time scaling past it profitably.

Our approach to advertising builds on a deep understanding of the awareness stages your customers find themselves in without them even knowing.

We build marketing strategies that helps you grow past the ready-to-buy customers, and therefor reaches people you haven’t been able to target before.

Free Performance Analysis

Our approach to advertising builds on a deep understanding of the awareness stages your customers find themselves in without them even knowing.

We build marketing strategies that helps you grow past the ready-to-buy customers, and therefor reaches people you haven’t been able to target before.

Free Performance Analysis

In-house graphic designer

In-house growth partner for E-commerce businesses

In-house growth partner for established E-commerce businesses

What is our approach?

The foundation

Too many businesses forget to build & maintain the foundation, even the fastest growing ones. We need to know exactly what you can afford to pay for one new customer, how much that customer is worth, how many times they come back and the profitability on each purchase. This gives us a clear picture on when we are actually able to increase budgets & scale.

The execution

There's no magic in our approach, but we're the in-house team, that actually gets the tasks done and delivers results. We set the foundation, the goals and the direction and then we work backwards. What needs to happen before we're able to achieve those goals? Once we've answered that question, we get to work.

We partner with our clients for years

We're proud to have an average retention of 19.7 months which also means that some of our clients have been with us for over 4 years at this point. There's a reason for this. We've been on the other site of the table, built, owned and sold an E-commerce business. This gives us the ability to act as a growth partner that truly understands the business you are running, and can support or give advice on areas that isn't directly correlated with advertising.

Free Performance Analysis

Our clients

80k

followers

Scandinavia's fastest growing boheme fashion brand.

314k

followers

#1 Worldwide brand for toe spacers & foot health education.

80k

followers

DogCoach is Europe's #1 Dog Owner Clothing Brand

followers

Scandinavia's fastest growing soil & plant webshop.

4.9k

followers

#1 Online tech school with over 21.000 students worldwide, focusing on diversity.

43k

followers

The Beautiful Game is one of Netherlands' fastest growing football webshop & community.

18.9k

followers

Eclat is Netherlands #1 Webshop for Collagen supplements.

10k

followers

Deplay is Netherlands #1 fastest growing tablet for kids.

28.2k

followers

Louise Bruun is known for the biggest education platform in Denmark teaching about anti inflammatory foods.

20k

followers

Short Form Society has helped over 1.000 people in Europe start their own business online.

20k

followers

Swedens #1 online course for starting an E-commerce business.

9.2k

followers

Denmarks fastest growing fashion brand for plus sized women.

7.2k

followers

#1 Rental Service in Norway for photobooths.

168k

followers

Hampus is the #1 fitness coach in Sweden with over +160.000 followers.

77k

followers

KM Community is the #1 community in Netherlands, helping people start their own E-commerce business.

96k

followers

The Airbnb business of glamping experiences in Europe.

80k

followers

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314k

followers

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80k

followers

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followers

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4.9k

followers

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43k

followers

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18.9k

followers

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10k

followers

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28.2k

followers

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20k

followers

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20k

followers

This is a temporary text used to demonstrate the layout and design.

9.2k

followers

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7.2k

followers

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168k

followers

This is a temporary text used to demonstrate the layout and design.

77k

followers

This is a temporary text used to demonstrate the layout and design.

96k

followers

This is a temporary text used to demonstrate the layout and design.

80k

followers

Scandinavia's fastest growing boheme fashion brand.

314k

followers

#1 Worldwide brand for toe spacers & foot health education.

80k

followers

DogCoach is Europe's #1 Dog Owner Clothing Brand

followers

Scandinavia's fastest growing soil & plant webshop.

4.9k

followers

#1 Online tech school with over 21.000 students worldwide, focusing on diversity.

43k

followers

The Beautiful Game is one of Netherlands' fastest growing football webshop & community.

18.9k

followers

Eclat is Netherlands #1 Webshop for Collagen supplements.

10k

followers

Deplay is Netherlands #1 fastest growing tablet for kids.

28.2k

followers

Louise Bruun is known for the biggest education platform in Denmark teaching about anti inflammatory foods.

20k

followers

Short Form Society has helped over 1.000 people in Europe start their own business online.

20k

followers

Swedens #1 online course for starting an E-commerce business.

7.2k

followers

#1 Rental Service in Norway for photobooths.

9.2k

followers

Denmarks fastest growing fashion brand for plus sized women.

77k

followers

KM Community is the #1 community in Netherlands, helping people start their own E-commerce business.

96k

followers

The Airbnb business of glamping experiences in Europe.

80k

followers

This is a temporary text used to demonstrate the layout and design.

314k

followers

This is a temporary text used to demonstrate the layout and design.

80k

followers

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followers

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4.9k

followers

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43k

followers

This is a temporary text used to demonstrate the layout and design.

18.9k

followers

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10k

followers

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28.2k

followers

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20k

followers

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20k

followers

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9.2k

followers

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7.2k

followers

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168k

followers

This is a temporary text used to demonstrate the layout and design.

77k

followers

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96k

followers

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