Customize the email ad unit

Since the ads are requested server-side, you can take the JSON response and insert it into the email as you compile it, enabling the ad unit to take on any form.


Incorporate user-level targeting

Use Adzerk's UserDB to store first-party user data, and then include targeting rules when requesting ads to ensure that each ad is relevant to that particular user.


Ad decisions handled for you

We can take tens of thousands of email ads and choose the best one in milliseconds based on targeting, revenue goals, and more. Building this in-house could take years.

Email ad example

email ads
API Docs

Multiple APIs provide the flexibility to build the exact email ad server you want, in 90% less time than starting from scratch

Think of Adzerk like a box of Legos: our infrastructure tools let you build, test, and tweak any email ad server - with flexibility around pricing, look/feel, targeting, pacing, and much more.

Test the API
Adzerk Benefits

Built for developers. Trusted by enterprises.

Keep building an awesome core business while staying confident Adzerk can support your email ad server.

99.99% API Uptime

We’ve been doing this for a decade - we know how to keep the system running

Fast Response Times

APIs and flexible server locations ensure fast response times and minimal latency

Dev Support On Deck

You’ll be teamed with support engineers, software engineers, and account managers

GDPR Compliance

We have the tools to block EU PII and collect and honor consent

Enterprise Security

We've got SOC 1 (SSAE 16) certifications, VPCs, and more

From Our Customers
Adzerk's Decision Engine is scalable, fast, and always picks the right promotion to show. It's easily the leading solution in the market.
David Han, VP of Product, Ticketmaster
Get Started

Learn how Adzerk can help you build your own ad server in weeks, not years

Sign-up and start building