PropellerAds: Deliverability restored and clicks boosted by 92% with Brevo
By migrating to Brevo, advertising platform PropellerAds restored its domain reputation, doubling its open rate, before increasing clicks by 92% using A/B testing.
About PropellerAds
Founded in 2011, PropellerAds is a multisource advertising platform providing access to unique traffic sources and AI-based ad-serving and optimization tools for media buyers, agencies, brands, and affiliate marketers. The company was an early leader in Popunder advertising, and has since expanded into native and display formats, including Push Notifications. Today, PropellerAds delivers over 15 billion ad impressions a day across 195+ GEOs. With a database of hundreds of thousands of contacts, email communication is a critical strategic pillar to engage, retain, and reactivate their international audience.
Restoring domain reputation and unlocking engagement
Following their migration from Emarsys, PropellerAds initially faced significant challenges related to their domain reputation. In January 2026, their open rates were dangerously stagnant (around 5 to 6%). The team's objective was twofold: urgently restore optimal deliverability to regain their audience's attention, and then find the perfect email structure to drastically boost engagement and clicks.
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Rebuilding reputation and discovering the perfect email formula
To address these challenges, PropellerAds relied on the Brevo platform and its strategic support:- Deliverability restoration<strong>:</strong> PropellerAds rigorously followed Brevo's deliverability recommendations. For 1.5 months, they sent campaigns only to contacts who had opened within a defined recent period, gradually widening that window as engagement improved. This strict sending hygiene strategy paid off: their reputation on Google Postmaster Tools went from "Low" to "High", and their open rates more than doubled.<br><br>
- Optimization via A/B Testing<strong>:</strong> To skyrocket engagement, the team deployed Brevo's A/B Testing tool. They ran 5 rigorous tests comparing their usual emails to much shorter formats (a strong hook, minimalist text, a single CTA). The short format won every single test, generating an average click increase of 92%.
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