Case Studies / ONNI® Products GmbH

How ONNI® Products GmbH Achieved a 30.1X ROWAS with WhatsApp During Black Week

> €10,5K

WhatsApp Revenue

€349.86

WhatsApp Spend

30.1x

ROWAS

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Written by Johannes Mansbart

CEO & Co-Founder, chatarmin.com

Last updated at: October 02, 2025

Lifestyle

Initial Situation

ONNI® Products GmbH, a German company known for premium lifestyle and consumer products, planned a special campaign for Black Week.
The goal: maximize revenue and leverage WhatsApp as a direct conversion channel – without relying on expensive ads or crowded email inboxes.

Solution: Black Week Campaign with Chatarmin 🖤

With Chatarmin, ONNI® executed a WhatsApp campaign built on relevance, personalization, and cost efficiency:

  • Shopify integration for precise product recommendations and automated tracking.
  • High reach and engagement thanks to WhatsApp messages with outstanding open rates.
  • Efficiency: no markup on Meta costs and full transparency on ROI.

Results

The Black Week campaign exceeded all expectations:

ONNI® Products  Black Week Special WA Campaign

  • €10,527.99 revenue via WhatsApp 💰
  • €349.86 WhatsApp costs
  • 30.1X ROWAS 🚀
  • 72.2% open rate 📬
  • €104.24 AOV 📦
  • €3.21 revenue per recipient 👥

Conclusion

The ONNI® Black Week campaign demonstrates that WhatsApp is one of the most efficient and profitable channels for sales campaigns.
Thanks to Chatarmin, ONNI® achieved record-breaking revenue with minimal costs, maximum reach, and a 30.1X Return on WhatsApp Spend.

👉 Want to see how your brand can use WhatsApp as a revenue driver?
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