Header bidding vs Open Bidding: key differences explained

• Header bidding and Open Bidding can increase publisher revenue. Both solutions allow you to create an auction in which multiple demand partners simultaneously compete for the same inventory.

• Open Bidding is a solution provided by Google. Using it enables competition between external bidders and Google’s own demand.

• Client-side header bidding implementations can provide greater transparency.

• Both server-side header bidding and Open Bidding can reduce latency at the cost of trade visibility.

• You can run both solutions simultaneously for even greater competition. However, this adds operational complexity through managing yield across two auction paths and preventing bid duplication.

Choosing between header bidding and Open Bidding is a natural challenge for every publisher who has moved beyond the basic capabilities of programmatic monetization. These solutions are similar, but in one case, you do everything yourself, while in the other, you hand the steering wheel to Google.

Publishers using header bidding earn, on average, 30–40% more ad revenue than in single-SSP waterfall setups, according to Prebid.org. Open Bidding also increases publisher revenue but has several limitations.

We're here to help you figure out which solution is right for your business. In this article, you'll find a detailed comparison of both approaches from experienced programmatic experts.

What is header bidding?

Header bidding flips the old waterfall model on its head. This mechanism allows all your demand partners to bid simultaneously before the ad server makes the final selection. The result? Publishers typically see their yield jump compared to the sequential waterfall approach, where the first buyer who met your floor could win without any other buyers getting a shot at bidding.

Simplified diagram of how a header bidding auction works

What is Open Bidding (Exchange Bidding)?

Open Bidding is a server-side auction mechanism within Google Ad Manager that enables third-party SSPs and exchanges to compete with Google demand for publisher inventory in real-time ad auctions. Previously, this technology was called Exchange Bidding (EBDA), but don’t let the names confuse you — we’re always talking about the same thing. 

The main difference from header bidding is that Open Bidding is built into Google Ad Manager. Only approved demand partners can participate — publishers cannot add partners independently as they can with header bidding. 

Header bidding vs Open Bidding

Let's break down how Open Bidding and header bidding actually differ when you're monetizing inventory:

On the one hand, header bidding offers much-valued flexibility, but on the other, it requires technical expertise. Google’s solution is technically simple — you can use it within your GAM account. However, Open Bidding has limitations on all sides: this is the price you pay for using a vendor’s ready-made solution.

Pros and cons of header bidding

In the next two sections, we will take a detailed look at header bidding vs Exchange Bidding, highlighting the advantages and disadvantages of each approach. First, we will examine header bidding — it is more complex but potentially more profitable than Google’s solution.

Pros:

• Maximum revenue potential. Multiple buyers competing at once usually drives CPMs up by 30-40% compared to outdated waterfall models.

• Complete auction control. Publishers set floor prices, configure timeout parameters, prioritize demand partners, and customize auction logic to match their inventory strategy.

• Transparency. Client-side header bidding provides better bid-level visibility and partner performance metrics than Open Bidding's aggregated reporting. However, server-side implementation and individual SSP policies can limit the granularity of available data.

• Platform independence. Works with any ad server, eliminating vendor lock-in.

• Unlimited demand partners. Connect as many SSPs, ad exchanges, DSPs, ad networks, and direct buyers as needed without approval requirements or artificial restrictions.

• Comprehensive format support. Handles display, video, and native across all environments.

• Direct relationships. Publishers negotiate directly with demand partners, maintaining control over terms, fees, and partnership conditions.

Cons:

• Technical complexity. You'll need to set up and maintain a wrapper like Prebid.js, manage partner connections, track performance, and resolve issues as they arise.

• Increased latency (client-side only). The client-side version adds load time while waiting for bids, which can hurt UX. Running it server-side (Prebid Server) can reduce that delay.

• Ad blocker vulnerability (client-side only). Client-side code runs in the browser, where ad blockers can potentially reduce bid participation. Server-side header bidding bypasses this issue by processing auctions on servers that ad blockers cannot reach.

• Resource requirements. Demands dedicated technical resources for setup, ongoing optimization, and partner relationship management.

• Timeout optimization challenges. Balancing auction duration against page speed requires constant adjustment: the longer you set the duration time, the more bids you can process. The flip side of this is users waiting for pages to load.

• Browser compatibility issues. Different browsers may handle header bidding code differently, requiring testing and adjustments across environments.

Both solutions — header bidding and Exchange Bidding — are powerful tools for increasing revenue. And while header bidding may seem like the more suitable option at first glance, it’s also worth considering the alternative in the form of Google’s solution.

Pros and cons of Open Bidding

When comparing Open Bidding vs header bidding, Google's server-side solution offers distinct trade-offs that publishers should carefully evaluate. Here's how Open Bidding performs from a publisher perspective:

Many advanced publishers run both Open Bidding and header bidding simultaneously. This requires managing yield across dual-auction paths and preventing bid duplication, adding operational complexity. Publishers with dedicated AdOps teams use this approach to maximize demand competition.

Which should you choose?

The choice between header bidding and Exchange Bidding comes down to your tech team's skills, how much you prioritize revenue, and what infrastructure you already have.

Choose header bidding when:

• Independence from Google matters.

• Maximum demand access is the priority.

• Video or mobile inventory is significant.

• Revenue optimization justifies technical investment.

Choose Open Bidding when:

• You're already using Google Ad Manager. 

• Simplicity outweighs maximum control. 

• Technical resources are limited. 

• Page speed is the absolute priority. 

The hybrid approach: many publishers do not consider Open Bidding vs header bidding — they opt for a combination of both in a single stack. This maximizes competition and revenue while requiring careful management and significant technical resources.

How TeqBlaze can help

For publishers and monetization companies looking to build their own SSP infrastructure with header bidding support (Prebid.js and Prebid Server) under their branding, TeqBlaze offers a solution that is not tied to Google Ad Manager. 

We invite you to launch a white-label SSP that gives you the benefits of your own infrastructure while letting our team handle the technical issues. In addition to the core functionality of the advertising platform, you’ll have access to curated deals without the need for curators, ML-driven optimization models, a built-in AI assistant for the AdOps team, and many other advanced programmatic features.

We also offer the launch of white-label ad exchanges, DSPs, ad servers, and custom programmatic solutions. Book a demo to see how our solutions work in practice, or check our client reviews and opinions to learn what publishers say about our technologies.

Final thoughts

There's no one-size-fits-all answer for the header bidding vs Exchange Bidding comparison. What works depends on your specific setup — the kind of traffic you're monetizing, whether you've got a team that can handle technical complexity, and what your revenue goals look like. Plus, programmatic's not static. Buyer behavior shifts, new demand sources pop up, and regulations change. What's optimal now might need tweaking down the road. 

The whole "versus" framing might be the wrong way to think about it anyway. We see tons of publishers who don't choose — they run both header bidding and Open Bidding. Header bidding gives them unlimited partner access, and Open Bidding keeps their Google relationships smooth. Managing both takes effort, but that dual-path approach often makes sense. That's where white-label infrastructure becomes valuable — it gives you the control to run whatever setup fits your business without rebuilding the wheel.  

FAQ

What is the difference between header bidding and Open Bidding?

Both are mechanisms that allow multiple demand sources to compete for the same inventory; however, header bidding works with any ad server, while Open Bidding is built into Google Ad Manager.

Is Open Bidding the same as Exchange Bidding?

Yes, these are two names for the exact same solution. The confusion arises because the historical name, Exchange Bidding, was later changed to Open Bidding.

Does header bidding increase ad revenue?

Generally — yes. On average, we’re talking about a 30–40% increase in publishers’ revenue, though in practice the increase can be even higher. The revenue growth stems from a competitive environment in which the highest bid wins.

Can I use header bidding without Google Ad Manager?

You can use any ad server for header bidding: Google Ad Manager is the most common, but white-label solutions like those provided by TeqBlaze also work. Nevertheless, GAM remains the dominant option on the market.

What is Prebid, and how does it relate to header bidding?

Prebid is the header bidding framework maintained by the Prebid.org open-source community. TeqBlaze partners with Prebid.org as a Managed Service Provider, which means our white-label SSP already includes Prebid.