We are Wecker.
We help sellers 

Amazon and other online marketplaces.
Maximize profit, not revenue.

Software made specifically for sellers by actual experts from the field

Discover new ways to do business on Amazon with SELIN

Maximize your profits and find new opportunities. Software tailored to the needs of Amazon sellers just like you.

Learn more

Inventory analysis

Predicts the profitability of your items based on accurate market estimates.

Sales analysis

Unveils the exact profit made from your sales including all fees, refunds, and cost of goods.

Product returns tracking

Identifies problematic products, return rate, reason for return, refunds, and associated fees.

Product pricing

Flags uncompetitive products and provides a recommended price to beat your competitors

“For the past seven years, I've been helping sellers grow. At the moment my partners achieve a revenue of around 10,000,000 EUR annually. In my time as an online marketplace specialist I've learned an important note: it's not revenue that matters, it's profit. With that in mind, I've assembled a team of experts and with our combined knowledge, utilizing deep data analysis and my many years of experience in the field, we created SELIN.”

Jakub Petřek Co-founder

Ready to get started?

Don't miss out on the opportunity to grow your business with us.


Get in touch with us for any questions or feedback. We will get back to you as soon as possible.


In our work we abide the following


We are transparent in our work and communication. No hiding behind the bush, no secrets. We communicate things as they are.


Our main goal is maximilizing profits. Every step we take is with this goal in mind.


We don't compromise on quality.


Your feedback is very important

Amazon Profit Calculator

Calculate your profits from selling on Amazon.

Amazon Referral Fee (15%)EUR 0.00
Amazon Shipping Fee (15%)EUR 0.00
VAT (19%)EUR 0.00
Total CostEUR 0.00
ProfitEUR 0.00
Profit Margin0.00%

We help you make data-driven business decisions.

We help you maximize your profits.