Clinical research

How clinical research company Palleos holds a 29% open rate month after month

Palleos is a contract research organisation headquartered in Wiesbaden, Germany. Pharma, biotech and medical device companies hire it to run their clinical trials: study design, regulatory work, trial management, data and biostatistics, and drug safety. The company goes back to 2005, when OCT Clinical was founded and has merged with palleos healthcare under Palleos brand in 2024. It has run trials in 29 therapeutic areas and enrolled more than 70,000 patients.

Industry
clinical research
Where they operate
Europe
List size
more than 35,000 contacts
Using
campaigns, lists, campaign reports
With Selzy since
2021

Palleos builds its base out of separate lists. Contacts from each industry forum get a list of their own. So do the people from each webinar and each batch of LinkedIn leads. Lists are split by language too, and some are made for a single job, such as a survey. More than 250 of them sit in one Selzy account.

In many accounts, one big list gets cut into segments before a send. At Palleos the groups are kept apart from the start. Each campaign is written for the lists it goes to, in their language and with its own offer. Selzy sends it to a single list or to several at once.

The emails go out month after month. Selzy’s campaign report shows what happened to every send: delivered, opened, clicked, unsubscribed, marked as spam. The monthly view puts those numbers side by side, so a weaker month stands out as soon as it ends. In that view, the Palleos open rate has not dropped below 25% in any month since September 2025. January and late summer run highest.

Amalia Iljasova, Director of Marketing and PR at Palleos

With Selzy, our email work has become much more structured. We keep separate lists for each event, webinar, conference announcement, LinkedIn batch, and language, depending on the audience’s market. This makes it much easier and faster to send the right message to the right audience.

The feature we rely on most is campaign reports. They show delivered, opened, clicked, unsubscribed, and spam-complaint rates side by side, so we can quickly spot a weaker month and react. We also use the reader behavior map to better understand how our audience engages with each email.

I would recommend Selzy to B2B companies that manage multiple audiences and languages and need clear, reliable reporting without a complicated setup.

Amalia IljasovaDirector of Marketing and PR at Palleos

Overall, 29% of the people who get a Palleos email open it. Selzy shows that rate next to its own benchmark: the average is 14.8%. Gmail asks bulk senders to keep spam complaints under 0.1%. Palleos runs at 0.009%.

Selzy puts its benchmark next to your campaigns too, so you see where your open rate stands from the first send.

Palleos email campaign created and sent with Selzy
Publication date 07 Oct 2026