Case Studies / olakala

€69,264.44 WhatsApp revenue during Black Week – OLAKALA® case study

61,5x

Return on WhatsApp Spend

€136,35

Average Order Value

4,7%

Conversion Rate

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Written by Johannes Mansbart

CEO & Co-Founder, chatarmin.com

Last updated at: January 22, 2026

Clothing

OLAKALA® didn’t rely on one big discount message during Black Week. Instead, the brand ran multiple targeted WhatsApp campaigns, perfectly timed along the peak shopping phase. The result: measurable revenue, an exceptionally high ROI, and a channel that clearly performed while others were completely overcrowded.

The challenge: Black Week = peak attention overload

For most e-commerce brands, Black Week means one thing above all: overfilled inboxes and rising ad costs.

OLAKALA® faced the challenge of standing out despite massive promotional noise, without getting dragged into endless discount battles or diluting the brand. The solution: WhatsApp as a direct, personal sales channel – strategically orchestrated and technically scalable.

The strategy: Multiple campaigns instead of one big shot

Rather than putting everything into a single message, OLAKALA® opted for several WhatsApp campaigns throughout the entire Black Week.

The focus was on:

  • clear messaging per campaign
  • high relevance for subscribers
  • a frictionless customer experience chatarmin provided the technical foundation: intelligent sending logic, GDPR-compliant opt-ins, clean tracking, and stable performance – even at high sending volumes.

The results: When relevance meets reach

The numbers speak for themselves:

Olakala_CaseStudy

  • €69,264.44 WhatsApp revenue
  • €1,125.83 WhatsApp costs
  • 61.5x return on WhatsApp spend
  • €136.35 average order value
  • 14.2% click rate ## Why this worked

This success was no coincidence, but the result of three key factors:

1. Permission over push Every recipient had actively opted in. No wasted reach, no annoyed users.

2. Channel-first, not copy-paste The campaigns were written specifically for WhatsApp – short, clear, and highly relevant.

3. The right platform behind the scenes chatarmin ensured perfect timing, deliverability, and precise tracking. This turned WhatsApp from a communication channel into a true revenue driver.

Conclusion: Black Week can be highly profitable – with the right channel

OLAKALA® proved that WhatsApp is not just an add-on, but a strategic sales channel that truly shines during peak shopping periods.

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The right partner makes all the difference

Setting up WhatsApp marketing properly is complex. With chatarmin, it becomes a competitive advantage that directly translates into revenue.

About chatarmin.com chatarmin is the leading WhatsApp marketing platform for e-commerce brands in the DACH region. With a strong focus on GDPR compliance, performance, and user experience, chatarmin enables brands to turn WhatsApp into a profitable sales channel – without technical complexity.