Case Studies / COSLINE Cosmetics GmbH

How COSLINE Cosmetics Generated Over €22,000 with a WhatsApp Campaign

€22,805.38

WhatsApp Revenue

€22,805.38

WhatsApp Spend

8.3x

Return on WhatsApp Spend

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Written by Johannes Mansbart

CEO & Co-Founder, chatarmin.com

Last updated at: October 01, 2025

Beauty & Wellness

Challenge

COSLINE Cosmetics GmbH, known for high-quality cosmetic products, was looking for a way to increase the conversion rate of its promotions.
The central idea: a campaign that removes the shipping cost barrier, giving customers an extra incentive to purchase.

Email promotions had shown only limited effectiveness in the past. The goal was to use a more direct channel to achieve greater reach, higher open rates, and clear purchase conversions.

Solution

With Chatarmin, COSLINE Cosmetics launched a WhatsApp sales campaign focused on “free shipping.”

COSLINE Cosmetics_WhatsApp Kampagne_2025.png


The strategy:

  1. Simple value proposition – free delivery as a clear purchase incentive.
  2. Direct communication – personal messages via WhatsApp instead of crowded inboxes.
  3. Seamless checkout – direct links to the shop to make the buying process as smooth as possible.

This reduced the barrier to purchase, and the message reached the audience without detours.

Results

The campaign delivered strong results:

COSLINE Cosmetics_WhatsApp_Campaign_Results.png


  • WhatsApp revenue: €22,805.38
  • WhatsApp costs: €2,742.54
  • Return on WhatsApp Spend (ROWS): 8.3x
  • Conversion rate: 2.1%
  • Average Order Value (AOV): €43.36

Conclusion

The COSLINE Cosmetics case shows that WhatsApp campaigns with a clear value proposition such as “free shipping” can be powerful revenue drivers.

With a single action, the brand generated over €22,000 in revenue and achieved an 8.3x ROI – clear proof that WhatsApp is a highly effective performance channel in the cosmetics industry.