Guide

Ad server vs ad network: what's the difference?

One is technology and one is a business. Here's how they differ and how they fit together.

The short answer

An ad server is technology. An ad network is a business. The ad server delivers and tracks ads. The ad network buys inventory from many publishers and sells it to advertisers, and it runs on an ad server to do that.

Side by side

Ad serverAd network
What it isSoftware that decides, delivers and tracks adsA company that aggregates inventory and sells it to advertisers
Main usersPublishers, advertisers, agencies, networksAdvertisers buying reach; publishers selling inventory
How it earnsLicense or usage feesMargin between what advertisers pay and publishers earn
ExamplesDJAX AdServer, Google Ad Manager, Revive AdserverNetworks for display, mobile, gaming or performance traffic

How they work together

An ad network uses an ad server to onboard publishers, create advertiser campaigns, decide which ad serves where, and calculate what everyone earns and owes. Publishers may also run their own ad server and use the network as one source of demand among several.

Starting your own ad network

To launch an ad network you need publishers with inventory, advertisers with budgets, and an ad server with white-label portals, billing and fraud protection. See how ad networks run on DJAX AdServer.

Frequently asked questions

Is an ad network the same as an ad exchange?

No. An ad network buys and resells inventory, usually setting prices itself. An ad exchange is a marketplace where buyers and sellers trade impressions in real-time auctions.

Can a publisher use both an ad server and ad networks?

Yes. Most publishers run their own ad server and plug in several ad networks and exchanges as demand sources.

What do I need to start an ad network?

Publisher supply, advertiser demand, and an ad server that handles multi-party campaigns, reporting, billing and fraud filtering.

Written by the DJAX AdServer team. Updated September 2026.

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