Black Week 2025: Performance Across Sello

Black Week 2025 has concluded, and this year’s results show clear growth for the brands connected through Sello. During the full period from November 25 through December 1, covering both Black Week and Cyber Monday, sales and order volumes increased significantly year over year.

Total sales processed through Sello reached €15,052,960, an increase of 26 percent compared to the previous year. Order volume rose from 248,101 to 271,225, a 9 percent increase.

Top-selling product

The strongest-performing product category was a sweatshirt, with more than 8,500 units sold across various sizes and variations. Fashion continues to demonstrate strong marketplace performance during peak periods.

Top-performing marketplaces in the EU (among Sello-connected brands)

1. Zalando
2. Allegro
3. Manor

Top marketplaces in the Nordics (based on Sello custoemr performance)

1. CDON
2. Tradera
3. Amazon

Several patterns stood out this year. Brands with automated workflows, real-time stock syncing and a broad marketplace presence experienced the most stable performance, even during the highest-traffic days. Efficient integrations enabled smooth scaling without added operational strain.

These results highlight the continued importance of marketplaces as a growth channel for e-commerce brands across Europe. With the right integration strategy, brands can expand their reach and handle peak demand without increasing manual workload.

Christoffer Andersson, CEO & Founder