Start successful international sales with Selium!

Get international marketplaces with us: Amazon, eBay, Kaufland, Cdiscount and Aliexpress!

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We are one of the first agencies specializing in selling on Amazon, eBay, Real, Cdiscount and Aliexpress. For many years, we have been successfully training, advising and developing businesses on international sales platforms.


We will train you and your team. 100% of practical knowledge collected over the years. We will help you develop your business.


We comprehensively support sales on platforms. We support sales on major portals in 5 languages.

Account security
Account security

We will protect your account against competition and ensure a secure connection.


Take your business to a new level and save time and money with BaseLinker - the comprehensive order manager.


Based on our experience, we will indicate both the weaknesses and strengths of your activities on marketplaces.


Over the years of practice, we have developed the best and cheapest shipping methods to EU countries.


Prowadzą sprzedaż dla naszych Partnerów biznesowych zostaliśmy docenieni prze największe portale i nagrodzeni certyfikatami potwierdzającymi jakość naszych usług.

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Sell globally!

Are you a manufacturer or distributor?

  • You don't want to allocate your company's resources for sale on Amazon or eBay only in the core of your business?

  • Do you want international customer service to be carried out professionally and in accordance with the guidelines of Amazon or eBay?

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Automation of procurement processes

As one of the few companies in Poland, we are an AUTHORIZED BASELINKER PARTNER.
Thanks to my own experience and working with clients, I know how to dress all repetitive activities in automatic processes, which will save your company time and costs.

Process optimization
  • Thanks to BaseLinker

  • you have access to over 200 integrations for use in your company.

  • BaseLinker implementations ensure the maximum level of use of the program's capabilities from the first day of its operation.


Accounts established


Satisfied customers


Trained people


Unlocked accounts


Check how other customers rate employees from the Selium group.

Margaret Starska

I recommend! When you optimize your eBay account, you see increased sales fairly quickly. Thank you for your help!

Anna Płuska

I recommend training on ebay and amazon sales at Mateusz to everyone who is just planning to start selling, as well as to those who want to learn. First of all, it is an amazing dose of knowledge that cannot be read on the Internet, practical exercises and all this in a great atmosphere. I recommend!

Adrian Pakulski

Express help, even after completing the training! The company is definitely worth recommending!

Marek Zieba

Each new platform is a challenge. I recommend eBay implementation training, everything is clear and concrete, thanks to which we saved a lot of time in the company.

Michał Makowiecki

Professionalism, quick solution. Cool approach - above all to the point.

Companies we work with.

Increase your sales!

Want to start or expand your sales in international markets via eBay and Amazon? Do you need advice or are you looking for a platform to exchange experiences? So you've come to the perfect place! Join the ranks of my satisfied customers now! Subscribe to the newsletter to stay up to date!

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