Home Platforms PubMatic Is Suing Google For Monopolistic Behavior, The Second Such SSP Case

PubMatic Is Suing Google For Monopolistic Behavior, The Second Such SSP Case

SHARE:
A comic depicting Judge Leonie Brinkema's view of the her courtroom where the DOJ vs. Google ad tech antitrust trial is about to begin. (Comic: Court Is In Session)

For Google’s ad tech division, it’s lawsuits all the way down.

On Monday, PubMatic became the second sell-side platform to file a follow-on antitrust lawsuit against Google. It accuses the massive corporation of illegally monopolizing the ad tech market, which was decided in a suit earlier this year, as well as specifically impeding PubMatic’s ability to compete on a level playing field.

Although PubMatic’s filing is a few pages shorter than the lawsuit filed by OpenX in early August, it similarly requests a jury trial to decide on compensatory financial damages, which it anticipates will “reach into the billions.”

Both lawsuits were filed to the same Virginia court that found Google guilty of monopolistic business practices in two Department of Justice (DOJ) antitrust cases, regarding the search advertising and publisher ad tech markets, respectively.

Losing independence

PubMatic’s argument is familiar to those who followed the DOJ’s initial complaint against Google’s sell-side ad tech monopoly, which Judge Leonie Brinkema decided in April.

Among other things, the SSP alleges that Google bought its way “into markets that PubMatic helped create” by quickly acquiring competitors and partners, namely DoubleClick, Admeld and Invite Media (which, with PubMatic, conducted the first real-time bidding transaction in 2008).

Google’s anticompetitive tactics and subsequent market dominance led to higher costs for advertisers, reduced ad revenue for publishers and “fewer independent voices online,” PubMatic alleges.

“We’ve been competing on a tilted playing field where greed superseded innovation and coercion blocked transparency,” PubMatic Co-Founder and CEO Rajeev Goel wrote in a blog post on Monday. “These practices have diverted billions in ad revenue away from independent platforms like ours and the publishers we support.”

PubMatic did not provide additional comment beyond pointing AdExchanger to its press release, Q+A website and Goel’s blog post.

Subscribe

AdExchanger Daily

Get our editors’ roundup delivered to your inbox every weekday.

More to come? 

The timing of PubMatic’s lawsuit is also interesting, given that one remedies phase for a Google monopoly case just ended and another is set to begin.

As part of the upcoming remedies phase for Judge Brinkema’s April decision, the Department of Justice has recommended punishments ranging from Google giving its AdX bid data to competitors to completely spinning off or selling its publisher ad tech unit.

In the meantime, expect other SSP competitors to (literally) follow suit with more litigation.

On the heels of OpenX’s announcement, Magnite hinted in its latest earnings call that it, too, might take legal action against Google. And while not an SSP per se, the publisher People Inc. also filed a lawsuit against Google at the end of August.

And yes, People Inc. is requesting a jury trial, too.

Must Read

Monopoly Man looks on at the DOJ vs. Google ad tech antitrust trial (comic).

2025: The Year Google Lost In Court And Won Anyway

From afar, it looks like Google had a rough year in antitrust court. But zoom in a bit and it becomes clear that the past year went about as well as Google could have hoped for.

Why 2025 Marked The End Of The Data Clean Room Era

A few years ago, “data clean rooms” were all the ad tech trades could talk about. Fast-forward to 2026, and maybe advertisers don’t need to know what a data clean room is after all.

The AI Search Reckoning Is Dismantling Open Web Traffic – And Publishers May Never Recover

Publishers have been losing 20%, 30% and in some cases even as much as 90% of their traffic and revenue over the past year due to the rise of zero-click AI search.

Privacy! Commerce! Connected TV! Read all about it. Subscribe to AdExchanger Newsletters

No Waiting for May – CES Is Where The TV Upfront Season Starts 

If any single event can be considered the jumping-off point for TV upfronts, it’s the Consumer Electronics Showcase (CES), which kicks off this week in Las Vegas, Nevada.

Comic: This Is Our Year

Comic: This Is Our Year

It’s been 15 years since this comic first ran in January 2011, and there’s something both quaint and timeless about it. Here’s to more (and more) transparency in 2026, and happy New Year!

From AI To SPO: The Top 10 AdExchanger Guest Columns Of 2025

The generative AI trend generated endless hot takes this year, but the ad industry also had plenty to say about growing competition between DSPs and SSPs. Here are AdExchanger’s top 10 most popular guest columns of 2025 and why they resonated.