The portfolio of product review and tech sites turned off most of its header bidders last month and moved to server-to-server integrations with the same partners.

Industrywide, server-to-server is considered a logical next step after header bidding. Amazon is moving server-to-server, and Google’s exchange bidding product is building server-to-server connections with partners.

“What’s great about header bidding is that it adds more demand sources and competition,” said Purch CTO John Potter. “What’s not good about it is that the entire process takes place on the user’s browser. Moving server-to-server, we get rid of all that back-and-forth on the client side and remove a lot of clutter and latency from the user’s page.”

To create its server-to-server connections, Purch used its own team of engineers to work with its ad tech partners on developing server-to-server connections.

Once Purch switched to server-to-server connections, it saw latency decrease by at least half a second. Revenue held steady, maintaining the gains Purch saw when it switched to header bidding.

While Purch rolled out server-to-server, Potter kept its header bidding partners live, but he soon turned those off.

“As we added more demand sources [server-to-server], we found the header bidders weren’t winning enough inventory to make it worthwhile,” Potter said.

With its custom solution, Purch is including not just banner ad demand sources server-side, but partners bidding on video ads or native placements. It works with 21 partners via server-to-server integrations.

Those partners see Purch’s inventory more reliably, because fewer of their bids time out, Potter said. Ads serve faster, improving viewability and wasted bids.