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Passendo is the leading European platform commercializing newsletter inventory. Founded in 2016 by two digital advertising pioneers, our award-winning email ad server and SSP provide value for publishers and advertisers worldwide, with over 4000 premium publishing house newsletter inventories across the world.

Partnering with some of the world’s largest media publishers, we help them activate new incremental revenues in an existing and untapped media channel, reaching new audiences that unlock new opportunities.

Our email ad server reduces manual work by up to 80 percent, helping clients improve and optimize their workflows, booking their own sold campaigns across their own inventory while continuing to build trust and understanding towards their subscribers. 

Passendo works with in-email inventory - we make email relevant again for tomorrow’s ad formats. One of the key advantages with this is that the users opt-in to receive newsletters from a specific publisher or brand - they are expecting to hear from them - so are very loyal to them. Within this, you have the luxury of dedicated time, alongside serious editorial content, with none of the distractions you face with other channels.

  Our unique inventory, delivered in real-time, results in higher click rates, higher conversion rates and higher time on site (TOS) in newsletters.