Case Studies / Vetain

How VETAIN Achieved a 75.3x ROWAS with a Single WhatsApp Campaign

€6,4K

WhatsApp Revenue

€85

WhatsApp Spend

75.3x

ROWAS

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Written by Johannes Mansbart

CEO & Co-Founder, chatarmin.com

Last updated at: September 29, 2025

FMCG

Context

Veganuary is a crucial revenue driver for plant-based brands like VETAIN.
But in the middle of countless promotions and discounts from other providers, the team had to find a way to capture their audience’s attention quickly and effectively.

The Challenge

Traditional email campaigns often achieve open rates of just 15–25%.
For a time-sensitive campaign like Veganuary, this wasn’t enough. VETAIN needed a channel that:

  • grabs attention almost instantly,
  • delivers high engagement rates, and
  • maximizes ROI with minimal ad spend.

The Solution: WhatsApp with Chatarmin

Together with Philipp Riedl and the Chatarmin team, VETAIN launched a targeted WhatsApp campaign.

The setup was lean, the execution fast – and the impact enormous:

  • 70.6% open rate (in reality closer to ~85% due to grey tick non-tracking)
  • 22.1% click rate – far above industry standards
  • personalized messages that immediately sparked conversations

VETAIN_WhatsApp_Campaign.png

Results

The numbers speak for themselves:

  • €6,402.72 revenue from WhatsApp
  • €85.04 ad spend
  • 75.3x Return on WhatsApp Spend (ROWAS)

With just one campaign, VETAIN achieved a return that email or social ads could hardly match.

VETAIN_WhatsApp_KPIs.png

Conclusion

With WhatsApp and Chatarmin, VETAIN has established a highly profitable direct channel that:

  • generates revenue with almost no risk,
  • strengthens community engagement, and
  • becomes a growth driver during peak moments like Veganuary.